{"id":51979,"date":"2024-12-03T11:29:58","date_gmt":"2024-12-03T03:29:58","guid":{"rendered":"https:\/\/fwq.ai\/blog\/51979\/"},"modified":"2024-12-03T11:29:58","modified_gmt":"2024-12-03T03:29:58","slug":"linux%e4%b8%ad%e7%9a%84%e7%89%b9%e6%ae%8a%e5%ad%97%e7%ac%a6%e5%8f%8a%e5%90%ab%e4%b9%89%e6%98%af%e4%bb%80%e4%b9%88","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/51979\/","title":{"rendered":"linux\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u53ca\u542b\u4e49\u662f\u4ec0\u4e48"},"content":{"rendered":"

<\/b> <\/p>\n

linux\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u53ca\u542b\u4e49\u662f\u4ec0\u4e48<\/h1>\n

\u4eb2\u7231\u7684\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5982\u679c\u4f60\u70b9\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u8bf4\u660e\u4f60\u5bf9\u300alinux\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u53ca\u542b\u4e49\u662f\u4ec0\u4e48\u300b\u5f88\u611f\u5174\u8da3\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u7ed9\u5927\u5bb6\u8be6\u7ec6\u89e3\u6790\u4e00\u4e0b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u6240\u6709\u8ba4\u771f\u8bfb\u5b8c\u7684\u7ae5\u978b\u4eec\uff0c\u90fd\u6709\u5b9e\u8d28\u6027\u7684\u63d0\u9ad8\u3002<\/p>\n<\/p>\n

\n

linux\u7684\u7279\u6b8a\u5b57\u7b26\uff1a1\u3001\u201c#\u201d\u6ce8\u91ca\u5b57\u7b26\uff1b2\u3001\u201c~\u201d\uff0c\u4ee3\u8868\u7528\u6237\u7684home\u76ee\u5f55\uff1b3\u3001\u201c;\u201d\uff0c\u662f\u62c5\u4efb\u201c\u8fde\u7eed\u6307\u4ee4\u201d\u529f\u80fd\u7684\u7b26\u53f7\uff1b4\u3001\u201c\/\u201d\uff0c\u8def\u5f84\u76ee\u5f55\u5206\u9694\u7b26\uff1b5\u3001\u201c\\\u201d\uff0c\u8f6c\u4e49\u7b26\uff1b6\u3001\u201c|\u201d\uff0c\u7ba1\u9053\u7b26\uff1b7\u3001\u201c.\u201d\uff0c\u4ee3\u8868\u5f53\u524d\u76ee\u5f55\uff1b8\u3001\u201c..\u201d\uff0c\u4ee3\u8868\u7236\u76ee\u5f55\uff0c\u4e5f\u5c31\u662f\u5f53\u524d\u76ee\u5f55\u7684\u4e0a\u4e00\u7ea7\u76ee\u5f55\uff1b9\u3001\u201c?\u201d\uff0c\u6307\u7684\u662f\u5355\u5b57\u7b26\u901a\u914d\u7b26\uff0c\u4ee3\u8868\u6587\u4ef6\u540d\u4e2d\u4efb\u610f\u4e00\u4e2a\u5b57\u7b26\u7684\u5339\u914d\uff1b10\u3001\u201c*\u201d\uff0c\u4ee3\u8868\u4efb\u610f\u5b57\u7b26\u5e8f\u5217\uff0c\u5339\u914d\u4efb\u610f\u5b57\u7b26\u7b49\u3002<\/p>\n<\/blockquote>\n

linux\u7279\u6b8a\u7b26\u53f7\u4f7f\u7528\u53ca\u542b\u4e49<\/strong><\/h3>\n

#\uff1a<\/strong><\/p>\n

\u4ee5 # \u5f00\u5934\uff0c\u4ee3\u8868\u8fd9\u53e5\u8bdd\u662f\u6ce8\u91ca\u3002<\/p>\n

#\uff01\/bin\/bash \u5e38\u51fa\u73b0\u5728\u547d\u4ee4\u4e4b\u524d\uff0c\u6216\u8005\u547d\u4ee4\u4e4b\u540e\uff0c\u540e\u9762\u662f\u6ce8\u91ca\u6587\u5b57\uff0c\u4e0d\u4f1a\u88ab\u6267\u884c\n#\u5f53\u8f93\u5165\u7684\u547d\u4ee4\u4e0d\u60f3\u88ab\u6267\u884c\u65f6\u8f93\u5165\uff08#\uff09\u5c31\u884c\u4e86\n#This line is comments.\uff08\u8fd9\u662f\u4e00\u884c\u6ce8\u91ca\uff09<\/pre>\n
\u867d\u7136\u4e0a\u9762\u90a3\u6bb5\u8bdd\u5c31\u88ab\u5ffd\u7565\u4e86\uff0c\u4f46\u5b83\u8fd8\u662f\u4f1a\u6dfb\u52a0\u5230\u60a8\u7684\u547d\u4ee4\u5386\u53f2\u8bb0\u5f55\u4e2d\u3002<\/p>\n
\u66f4\u5389\u5bb3\u7684\u505a\u6cd5\u5982\u4e0b\uff1a<\/p>\n
\u5148\u5b9a\u4e49\u4e00\u4e2a\u53d8\u91cf\u5e76\u7ed9\u5b83\u8d4b\u503c\u5b57\u7b26\u4e32 \u201camazing alvin\u201d<\/p>\n
this_string=\"amazing alvin\"<\/pre>\n
\"linux\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u53ca\u542b\u4e49\u662f\u4ec0\u4e48\u63d2\u56fe\"<\/p>\n
${this_string#amazing} \u8fd4\u56de\u7684\u662f\u88ab\u6ce8\u91ca\u6389 amazing \u7684 this_string \u5b57\u7b26\u4e32\u53d8\u91cf\uff0c\u53ef\u4ee5 echo \u8f93\u51fa\u770b\u4e0b\u7ed3\u679c\uff1a<\/p>\n
echo awsome ${this_string#amazing}<\/pre>\n
amazing \u53ea\u662f\u88ab\u6ce8\u91ca\u6389\u800c\u5df2\uff0c\u5b83\u5e76\u672a\u88ab\u5220\u9664\uff0c\u53bb\u6389\u6ce8\u91ca\u5b83\u5c31\u56de\u6765\u4e86\uff1a<\/p>\n
echo $this_string<\/pre>\n
\"linux\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u53ca\u542b\u4e49\u662f\u4ec0\u4e48\u63d2\u56fe1\"<\/p>\n
~<\/strong><\/p>\n
~ \u4ee3\u8868\u7528\u6237\u7684home\u76ee\u5f55\uff0c\u6307\u7684\u662f\u4e3b\u76ee\u5f55\uff0c\u4e5f\u5c31\u662f\u6211\u4eec\u7528\u6237\u7684\u4e2a\u4eba\u76ee\u5f55\uff0c\u65e0\u8bba\u4f60\u8eab\u5728\u4f55\u65b9\uff0c\u8f93\u5165 cd ~ \u5b83\u5c06\u5e26\u4f60\u56de\u5bb6\uff01<\/p>\n
cd ~<\/pre>\n
\"linux\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u53ca\u542b\u4e49\u662f\u4ec0\u4e48\u63d2\u56fe2\"<\/p>\n
\u66f4\u9ad8\u7aef\u7684\u73a9\u6cd5\u5c31\u662f\u5728\u5b83\u540e\u9762\u52a0\u4e0a\u5177\u4f53\u7684\u8def\u5f84\uff0c\u76f4\u63a5\u5b9a\u4f4d\u5230\u5bb6\u76ee\u5f55\u4e2d\u7684\u6307\u5b9a\u4f4d\u7f6e\uff0c\u662f\u4e0d\u662f\u5f88\u65b9\u4fbf\u5462\uff1f<\/p>\n
cd ~\/work\/archive<\/pre>\n
\"linux\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u53ca\u542b\u4e49\u662f\u4ec0\u4e48\u63d2\u56fe3\"<\/p>\n
\uff1b\u5206\u53f7<\/strong><\/p>\n
\u5728 shell \u4e2d\uff0c\u62c5\u4efb”\u8fde\u7eed\u6307\u4ee4”\u529f\u80fd\u7684\u7b26\u53f7\u5c31\u662f”\u5206\u53f7”\u3002<\/p>\n
\u8fd9\u8ddf\u6211\u4eec\u65e5\u5e38\u4f7f\u7528\u7684 “;” \u5dee\u4e0d\u591a\uff0c\u5c31\u4e0d\u7ec6\u8bf4\u4e86\uff0c\u4e3b\u8981\u662f\u7528\u6765\u5206\u9694\u547d\u4ee4\u7684\u3002<\/p>\n
ls > count.txt; wc -l count.txt; rm count.txt<\/pre>\n
\"linux\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u53ca\u542b\u4e49\u662f\u4ec0\u4e48\u63d2\u56fe4\"<\/p>\n
\u8fd9\u91cc\u6ce8\u610f\uff0c\u7528 ; \u5206\u9694\u547d\u4ee4\u65f6\uff0c\u5373\u4f7f\u7b2c\u4e00\u4e2a\u547d\u4ee4\u5931\u8d25\uff0c\u7b2c\u4e8c\u4e2a\u547d\u4ee4\u4e5f\u4f1a\u8fd0\u884c\uff0c\u5373\u4f7f\u7b2c\u4e8c\u4e2a\u547d\u4ee4\u5931\u8d25\uff0c\u7b2c\u4e09\u4e2a\u547d\u4ee4\u4e5f\u4f1a\u8fd0\u884c\uff0c\u4f9d\u6b64\u7c7b\u63a8\u3002<\/p>\n
\u5982\u679c\u8981\u5728\u4e00\u4e2a\u547d\u4ee4\u5931\u8d25\u7684\u60c5\u51b5\u4e0b\u5c31\u505c\u6b62\uff0c\u8bf7\u4f7f\u7528 “&&” \uff0c\u5982\u4e0b\uff1a<\/p>\n
cd .\/doesntexist && cp ~\/Documents\/reports\/* .<\/pre>\n
\"linux\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u53ca\u542b\u4e49\u662f\u4ec0\u4e48\u63d2\u56fe5\"<\/p>\n
\uff1b\uff1b\u8fde\u7eed\u5206\u53f7 (Terminator)<\/strong><\/p>\n
\u4e13\u7528\u5728 case \u7684\u9009\u9879\uff0c\u62c5\u4efb Terminator \u7684\u89d2\u8272\u3002<\/p>\n
case \"$fop\" inhelp) echo \"Usage: Command -help -version filename\";;version) echo \"version 0.1\" ;;esac<\/pre>\n
. dot<\/strong><\/p>\n
\u5728 shell \u4e2d\uff0c\u4f7f\u7528\u8005\u5e94\u8be5\u90fd\u6e05\u695a\uff0c\u4e00\u4e2a .<\/code> \u4ee3\u8868\u5f53\u524d\u76ee\u5f55\uff0c\u4e24\u4e2a ..<\/code> \u4ee3\u8868\u4e0a\u5c42\u76ee\u5f55<\/p>\n
\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u5f53\u524d\u76ee\u5f55\u4e0b\u7684\u5168\u90e8\u6587\u4ef6\uff1a<\/p>\n
ls -al<\/pre>\n
\"linux\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u53ca\u542b\u4e49\u662f\u4ec0\u4e48\u63d2\u56fe6\"<\/p>\n
\u7ea2\u5708\u91cc\u7684 . \u5c31\u662f\u6307\u5f53\u524d\u76ee\u5f55\uff0c\u4e0d\u8fc7\u8fd9\u6ca1\u4ec0\u4e48\u610f\u4e49\uff0c\u6211\u4eec\u66f4\u591a\u7684\u662f\u5728\u547d\u4ee4\u4e2d\u4f7f\u7528\u5b83\uff0c\u5982\u4e0b\uff1a<\/p>\n
.\/script.sh<\/pre>\n
\u8fd9\u6837\u505a\u662f\u5728\u544a\u8bc9 bash \u53ea\u8981\u5728\u5f53\u524d\u76ee\u5f55\u4e2d\u67e5\u627e\u5e76\u6267\u884c script.sh \u6587\u4ef6\u5c31\u597d\u4e86\uff0c\u4e0d\u7528\u5728\u8def\u5f84\u4e2d\u627e\u4e86\u3002<\/p>\n
\"linux\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u53ca\u542b\u4e49\u662f\u4ec0\u4e48\u63d2\u56fe7\"<\/p>\n
\u5047\u8bbe\u6211\u4eec\u8981\u56de\u5230\u4e0a\u4e00\u7ea7\u76ee\u5f55\uff1a<\/p>\n
cd ..<\/pre>\n
\"linux\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u53ca\u542b\u4e49\u662f\u4ec0\u4e48\u63d2\u56fe8\"<\/p>\n
\u8ddf\u524d\u9762\u4e00\u6837\uff0c\u4f60\u53ef\u4ee5\u5728\u5b83\u540e\u9762\u52a0\u5177\u4f53\u7684\u76ee\u5f55\uff0c\u8fd9\u91cc\u7684\u610f\u601d\u5c31\u662f\u5b9a\u4f4d\u5230\u4e0e\u5f53\u524d\u76ee\u5f55\u540c\u7ea7\u7684\u5176\u5b83\u76ee\u5f55\uff1a<\/p>\n
cd ..\/projects\/<\/pre>\n
\"linux\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u53ca\u542b\u4e49\u662f\u4ec0\u4e48\u63d2\u56fe9\"<\/p>\n
\u2018string\u2019 \u5355\u5f15\u53f7 (\u5b57\u7b26\u4e32\u5355\u5f15\u53f7\uff09<\/strong><\/p>\n
\u88ab\u5355\u5f15\u53f7\u7528\u62ec\u4f4f\u7684\u5185\u5bb9\uff0c\u5c06\u88ab\u89c6\u4e3a\u5355\u4e00\u5b57\u4e32\u3002\u5728\u5f15\u53f7\u5185\u7684\u4ee3\u8868\u53d8\u6570\u7684$\u7b26\u53f7\uff0c\u6ca1\u6709\u4f5c\u7528\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u4ed6\u88ab\u89c6\u4e3a\u4e00\u822c\u7b26\u53f7\u5904\u7406\uff0c\u9632\u6b62\u4efb\u4f55\u53d8\u91cf\u66ff\u6362\u3002<\/p>\n
hello world=hello world echo '$hello world' # We get $hello world<\/pre>\n
\u201cstring\u201d \u53cc\u5f15\u53f7 (\u5b57\u7b26\u4e32\u53cc\u5f15\u53f7)<\/strong><\/p>\n
\u88ab\u53cc\u5f15\u53f7\u7528\u62ec\u4f4f\u7684\u5185\u5bb9\uff0c\u5c06\u88ab\u89c6\u4e3a\u5355\u4e00\u5b57\u4e32\u3002\u5b83\u9632\u6b62\u901a\u914d\u7b26\u6269\u5c55\uff0c\u4f46\u5141\u8bb8\u53d8\u91cf\u6269\u5c55\u3002\u8fd9\u70b9\u4e0e\u5355\u5f15\u6570\u7684\u5904\u7406\u65b9\u5f0f\u4e0d\u540c<\/p>\n
heyyou=homeecho \"$heyyou\" # We get home<\/pre>\n
command\uff08\u547d\u4ee4\uff09<\/code> \u5012\u5f15\u53f7 (\u53cd\u5f15\u53f7)<\/strong><\/p>\n
\u5728\u524d\u9762\u7684\u5355\u53cc\u5f15\u53f7\uff0c\u62ec\u4f4f\u7684\u662f\u5b57\u4e32\uff0c\u4f46\u5982\u679c\u8be5\u5b57\u4e32\u662f\u4e00\u5217\u547d\u4ee4\u5217\uff0c\u4f1a\u600e\u6837\uff1f\u7b54\u6848\u662f\u4e0d\u4f1a\u6267\u884c\u3002\u8981\u5904\u7406\u8fd9\u79cd\u60c5\u51b5\uff0c\u6211\u4eec\u5f97\u7528\u5012\u5355\u5f15\u53f7\u6765\u505a\u3002<\/p>\n
fdv=`date +%F`echo \"Today $fdv\"<\/pre>\n
\u5728\u5012\u5f15\u53f7\u5185\u7684 date +%F \u4f1a\u88ab\u89c6\u4e3a\u6307\u4ee4\uff0c\u6267\u884c\u7684\u7ed3\u679c\u4f1a\u5e26\u5165 fdv \u53d8\u6570\u4e2d\u3002<\/p>\n
, \u9017\u70b9 (comma\uff0c\u6807\u70b9\u4e2d\u7684\u9017\u53f7)<\/strong><\/p>\n
\u8fd9\u4e2a\u7b26\u53f7\u5e38\u8fd0\u7528\u5728\u8fd0\u7b97\u5f53\u4e2d\u5f53\u505a\"\u533a\u9694\"\u7528\u9014\u3002\u4f8btouch f{1,2,3}<\/pre>\n
\/ \u659c\u7ebf (forward slash)\uff1a<\/strong><\/p>\n
\u5728\u8def\u5f84\u8868\u793a\u65f6\uff0c\u4ee3\u8868\u76ee\u5f55\u3002\u901a\u5e38\u5355\u4e00\u7684 \/ \u4ee3\u8868 root \u6839\u76ee\u5f55\u7684\u610f\u601d<\/p>\n
\u659c\u6760 “\/” \u6307\u7684\u662f\u8def\u5f84\u76ee\u5f55\u5206\u9694\u7b26\uff0c\u8fd9\u91cc\u6ca1\u4ec0\u4e48\u597d\u8bf4\u7684\u3002<\/p>\n
ls ~\/work\/tests\/<\/pre>\n
\"linux\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u53ca\u542b\u4e49\u662f\u4ec0\u4e48\u63d2\u56fe10\"<\/p>\n
\u4f46\u662f\uff0c\u6709\u610f\u601d\u7684\u662f\uff0c\u5982\u679c \/ \u8def\u5f84\u76ee\u5f55\u5206\u9694\u7b26\u524d\u9762\u6ca1\u6709\u4e1c\u897f\u7684\u8bdd\uff0c\u662f\u4e0d\u662f\u5c31\u662f\u610f\u5473\u7740\u8fd9\u662f\u6700\u4e0a\u7ea7\u7684\u76ee\u5f55\u4e86\uff1f\u7531\u4e8e Linux \u7cfb\u7edf\u7684\u76ee\u5f55\u6811\u5747\u59cb\u4e8e \/ \uff0c\u6240\u4ee5\u4ec5\u4ec5\u4e00\u4e2a \/ \u4ee3\u8868\u4e86\u6211\u4eec\u5e38\u8bf4\u7684\u7cfb\u7edf\u6839\u76ee\u5f55\u3002<\/p>\n
cd \/<\/pre>\n
\"linux\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u53ca\u542b\u4e49\u662f\u4ec0\u4e48\u63d2\u56fe11\"<\/p>\n
\\ \u5012\u659c\u7ebf(\u8f6c\u4e49\u7b26)<\/strong><\/p>\n
\u5728\u4ea4\u4e92\u6a21\u5f0f\u4e0b\u7684escape \u5b57\u5143\uff0c\u6709\u51e0\u4e2a\u4f5c\u7528\uff1b\u653e\u5728\u6307\u4ee4\u524d\uff0c\u6709\u53d6\u6d88 aliases\u7684\u4f5c\u7528\uff1b\u653e\u5728\u7279\u6b8a\u7b26\u53f7\u524d\uff0c\u5219\u8be5\u7279\u6b8a\u7b26\u53f7\u7684\u4f5c\u7528\u6d88\u5931\uff1b\u653e\u5728\u6307\u4ee4\u7684\u6700\u672b\u7aef\uff0c\u8868\u793a\u6307\u4ee4\u8fde\u63a5\u4e0b\u4e00\u884c\u3002<\/p>\n
# type rmrm is aliased to `rm -i'# \\rm .\/*.log<\/pre>\n
\u4e0a\u4f8b\uff0c\u6211\u5728 rm \u6307\u4ee4\u524d\u52a0\u4e0a escape \u5b57\u5143\uff0c\u4f5c\u7528\u662f\u6682\u65f6\u53d6\u6d88\u522b\u540d\u7684\u529f\u80fd\uff0c\u5c06 rm \u6307\u4ee4\u8fd8\u539f\u3002<\/p>\n
# bkdir=\/home# echo \"Backup dir, \\$bkdir = $bkdir\"Backup dir,$bkdir = \/home<\/pre>\n
\u4e0a\u4f8b echo \u5185\u7684 \\$bkdir\uff0cescape \u5c06 $ \u53d8\u6570\u7684\u529f\u80fd\u53d6\u6d88\u4e86\uff0c\u56e0\u6b64\uff0c\u4f1a\u8f93\u51fa $bkdir\uff0c\u800c\u7b2c\u4e8c\u4e2a $bkdir\u5219\u4f1a\u8f93\u51fa\u53d8\u6570\u7684\u5185\u5bb9 \/home\u3002<\/p>\n
| \u7ba1\u9053 (pipeline)<\/strong><\/p>\n
pipeline \u662f UNIX \u7cfb\u7edf\uff0c\u57fa\u7840\u4e14\u91cd\u8981\u7684\u89c2\u5ff5\u3002\u8fde\u7ed3\u4e0a\u4e2a\u6307\u4ee4\u7684\u6807\u51c6\u8f93\u51fa\uff0c\u505a\u4e3a\u4e0b\u4e2a\u6307\u4ee4\u7684\u6807\u51c6\u8f93\u5165\u3002<\/p>\n
who | wc -l<\/pre>\n
\u5584\u7528\u8fd9\u4e2a\u89c2\u5ff5\uff0c\u5bf9\u7cbe\u7b80 script\uff08\u811a\u672c\uff09 \u6709\u76f8\u5f53\u7684\u5e2e\u52a9<\/p>\n
! \u611f\u53f9\u53f7(negate or reverse)<\/strong><\/p>\n
\u901a\u5e38\u4ee3\u8868\u53cd\u903b\u8f91\u7684\u4f5c\u7528\uff0c\u6bd4\u5982\u6761\u4ef6\u4fa6\u6d4b\u4e2d\u7528\uff0c!= \u6765\u4ee3\u8868”\u4e0d\u7b49\u4e8e”<\/p>\n
ls f[!1-9]\u4ee3\u8868\u663e\u793a\u9664\u4e86f0, f1 …. f9 \u8fd9\u51e0\u4e2a\u6587\u4ef6\u7684\u5176\u4ed6\u6587\u4ef6<\/p>\n
:\u5192\u53f7<\/strong><\/p>\n
\u5728 bash \u4e2d\uff0c\u8fd9\u662f\u4e00\u4e2a\u5185\u5efa\u6307\u4ee4\uff1a”\u4ec0\u4e48\u4e8b\u90fd\u4e0d\u5e72”\uff0c\u4f46\u8fd4\u56de\u72b6\u6001\u503c 0<\/p>\n
echo $? # \u56de\u5e94\u4e3a 0\n: > f.$$<\/pre>\n
\u4e0a\u9762\u8fd9\u4e00\u884c\uff0c\u76f8\u5f53\u4e8e cat \/dev\/null >f.$$\u3002\u4e0d\u4ec5\u5199\u6cd5\u7b80\u77ed\u4e86\uff0c\u800c\u4e14\u6267\u884c\u6548\u7387\u4e5f\u597d\u4e0a\u8bb8\u591a\u3002<\/p>\n
\u6709\u65f6\uff0c\u4e5f\u4f1a\u51fa\u73b0\u4ee5\u4e0b\u8fd9\u7c7b\u7684\u7528\u6cd5<\/p>\n
: ${HOSTNAME?} ${USER?} ${MAIL?}<\/pre>\n
\u8fd9\u884c\u7684\u4f5c\u7528\u662f\uff0c\u68c0\u67e5\u8fd9\u4e9b\u73af\u5883\u53d8\u6570\u662f\u5426\u5df2\u8bbe\u7f6e\uff0c\u6ca1\u6709\u8bbe\u7f6e\u7684\u5c06\u4f1a\u4ee5\u6807\u51c6\u9519\u8bef\u663e\u793a\u9519\u8bef\u8baf\u606f\u3002\u50cf\u8fd9\u79cd\u68c0\u67e5\u5982\u679c\u4f7f\u7528\u7c7b\u4f3c test \u6216 if\u8fd9\u7c7b\u7684\u505a\u6cd5\uff0c\u57fa\u672c\u4e0a\u4e5f\u53ef\u4ee5\u5904\u7406\uff0c\u4f46\u90fd\u6bd4\u4e0d\u4e0a\u4e0a\u4f8b\u7684\u7b80\u6d01\u4e0e\u6548\u7387\u3002<\/p>\n
\u9664\u4e86\u4e0a\u8ff0\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e2a\u5730\u65b9\u5fc5\u987b\u4f7f\u7528\u5192\u53f7<\/p>\n
PATH=$PATH:$HOME\/fbin:$HOME\/fperl:\/usr\/local\/mozilla<\/pre>\n
\u5728\u4f7f\u7528\u8005\u81ea\u5df1\u7684HOME \u76ee\u5f55\u4e0b\u7684 .bash_profile\u6216\u4efb\u4f55\u529f\u80fd\u76f8\u4f3c\u7684\u6863\u6848\u4e2d\uff0c\u8bbe\u5b9a\u5173\u4e8e”\u8def\u5f84”\u7684\u573a\u5408\u4e2d\uff0c\u6211\u4eec\u90fd\u4f7f\u7528\u5192\u53f7\uff0c\u6765\u505a\u533a\u9694\u3002<\/p>\n
? \u95ee\u53f7 (wild card)<\/strong><\/p>\n
\u5728\u6587\u4ef6\u540d\u6269\u5c55(Filename expansion)\u4e0a\u626e\u6f14\u7684\u89d2\u8272\u662f\u5339\u914d\u4e00\u4e2a\u4efb\u610f\u7684\u5b57\u5143\uff0c\u4f46\u4e0d\u5305\u542b null \u5b57\u5143\u3002<\/p>\n
# ls a?a1<\/pre>\n
\u661f\u53f7 (wild card)<\/strong><\/p>\n
\u76f8\u5f53\u5e38\u7528\u7684\u7b26\u53f7\u3002\u5728\u6587\u4ef6\u540d\u6269\u5c55(Filename expansion)\u4e0a\uff0c\u5979\u7528\u6765\u4ee3\u8868\u4efb\u4f55\u5b57\u5143\uff0c\u5305\u542b null \u5b57\u5143\u3002<\/p>\n
# ls a*a a1 access_log<\/pre>\n
\u5728\u8fd0\u7b97\u65f6\uff0c\u5b83\u5219\u4ee3\u8868 “\u4e58\u6cd5”\u3002<\/p>\n
let \"fmult=2*3\"<\/pre>\n
\u9664\u4e86\u5185\u5efa\u6307\u4ee4 let\uff0c\u8fd8\u6709\u4e00\u4e2a\u5173\u4e8e\u8fd0\u7b97\u7684\u6307\u4ee4expr\uff0c\u661f\u53f7\u5728\u8fd9\u91cc\u4e5f\u62c5\u4efb”\u4e58\u6cd5”\u7684\u89d2\u8272\u3002\u4e0d\u8fc7\u5728\u4f7f\u7528\u4e0a\u5f97\u5c0f\u5fc3\uff0c\u4ed6\u7684\u524d\u9762\u5fc5\u987b\u52a0\u4e0aescape \u5b57\u5143\u3002<\/p>\n
** \u6b21\u65b9\u8fd0\u7b97<\/strong><\/p>\n
\u4e24\u4e2a\u661f\u53f7\u5728\u8fd0\u7b97\u65f6\u4ee3\u8868 “\u6b21\u65b9” \u7684\u610f\u601d\u3002<\/p>\n
let \"sus=2**3\"echo \"sus = $sus\" # sus = 8<\/pre>\n
$ \u7f8e\u5143<\/strong><\/p>\n
\u53d8\u91cf\u66ff\u6362(Variable Substitution)\u7684\u4ee3\u8868\u7b26\u53f7\u3002<\/p>\n
vrs=123echo \"vrs = $vrs\" # vrs = 123<\/pre>\n
\u53e6\u5916\uff0c\u5728 Regular Expressions \u91cc\u88ab\u5b9a\u4e49\u4e3a “\u884c” \u7684\u6700\u672b\u7aef (end-of-line)\u3002\u8fd9\u4e2a\u5e38\u7528\u5728grep\u3001sed\u3001awk \u4ee5\u53ca vim(vi) \u5f53\u4e2d\u3002<\/p>\n
${} \u53d8\u91cf\u7684\u6b63\u89c4\u8868\u8fbe\u5f0f<\/strong><\/p>\n
bash \u5bf9 ${} \u5b9a\u4e49\u4e86\u4e0d\u5c11\u7528\u6cd5\u3002\u4ee5\u4e0b\u662f\u53d6\u81ea\u7ebf\u4e0a\u8bf4\u660e\u7684\u8868\u5217   <\/p>\n
${parameter:-word}   ${parameter:=word}   ${parameter:?word}   ${parameter:+word}   ${parameter:offset}   ${parameter:offset:length}   ${!prefix*}   ${#parameter}   ${parameter#word}   ${parameter##word}   ${parameter%word}   ${parameter%%word}   ${parameter\/pattern\/string}   ${parameter\/\/pattern\/string}<\/pre>\n
$*<\/strong><\/p>\n
$* \u5f15\u7528script\u7684\u6267\u884c\u5f15\u7528\u53d8\u91cf\uff0c\u5f15\u7528\u53c2\u6570\u7684\u7b97\u6cd5\u4e0e\u4e00\u822c\u6307\u4ee4\u76f8\u540c\uff0c\u6307\u4ee4\u672c\u8eab\u4e3a0\uff0c\u5176\u540e\u4e3a1\uff0c\u7136\u540e\u4f9d\u6b64\u7c7b\u63a8\u3002\u5f15\u7528\u53d8\u91cf\u7684\u4ee3\u8868\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n
$0, $1, $2, $3, $4, $5, $6, $7, $8, $9, ${10}, ${11}.....<\/pre>\n
\u4e2a\u4f4d\u6570\u7684\uff0c\u53ef\u76f4\u63a5\u4f7f\u7528\u6570\u5b57\uff0c\u4f46\u4e24\u4f4d\u6570\u4ee5\u4e0a\uff0c\u5219\u5fc5\u987b\u4f7f\u7528 {} \u7b26\u53f7\u6765\u62ec\u4f4f<\/p>\n
$* \u5219\u662f\u4ee3\u8868\u6240\u6709\u5f15\u7528\u53d8\u91cf\u7684\u7b26\u53f7\u3002\u4f7f\u7528\u65f6\uff0c\u5f97\u89c6\u60c5\u51b5\u52a0\u4e0a\u53cc\u5f15\u53f7\u3002<\/p>\n
echo \"$*\"<\/pre>\n
\u8fd8\u6709\u4e00\u4e2a\u4e0e $* \u5177\u6709\u76f8\u540c\u4f5c\u7528\u7684\u7b26\u53f7\uff0c\u4f46\u6548\u7528\u4e0e\u5904\u7406\u65b9\u5f0f\u7565\u4e3a\u4e0d\u540c\u7684\u7b26\u53f7<\/p>\n
\uffe5@<\/strong><\/p>\n
$@ \u4e0e $* \u5177\u6709\u76f8\u540c\u4f5c\u7528\u7684\u7b26\u53f7\uff0c\u4e0d\u8fc7\u5979\u4eec\u4e24\u8005\u6709\u4e00\u4e2a\u4e0d\u540c\u70b9\u3002<\/p>\n
\u7b26\u53f7 $* \u5c06\u6240\u6709\u7684\u5f15\u7528\u53d8\u91cf\u89c6\u4e3a\u4e00\u4e2a\u6574\u4f53\u3002<\/p>\n
\u4f46\u7b26\u53f7 $@ \u5219\u4ecd\u65e7\u4fdd\u7559\u6bcf\u4e2a\u5f15\u7528\u53d8\u91cf\u7684\u533a\u6bb5\u89c2\u5ff5\u3002<\/p>\n
$#<\/strong><\/p>\n
\u8fd9\u4e5f\u662f\u4e0e\u5f15\u7528\u53d8\u91cf\u76f8\u5173\u7684\u7b26\u53f7\uff0c\u5979\u7684\u4f5c\u7528\u662f\u544a\u8bc9\u4f60\uff0c\u5f15\u7528\u53d8\u91cf\u7684\u603b\u6570\u91cf\u662f\u591a\u5c11\u3002<\/p>\n
echo \"$#\"<\/pre>\n
$? \u72b6\u6001\u503c (status variable)<\/strong><\/p>\n
\u4e00\u822c\u6765\u8bf4\uff0cUNIX(linux) \u7cfb\u7edf\u7684\u8fdb\u7a0b\u4ee5\u6267\u884c\u7cfb\u7edf\u8c03\u7528exit()\u6765\u7ed3\u675f\u7684\u3002\u8fd9\u4e2a\u56de\u4f20\u503c\u5c31\u662fstatus\u503c\u3002\u56de\u4f20\u7ed9\u7236\u8fdb\u7a0b\uff0c\u7528\u6765\u68c0\u67e5\u5b50\u8fdb\u7a0b\u7684\u6267\u884c\u72b6\u6001\u3002<\/p>\n
\u4e00\u822c\u6307\u4ee4\u7a0b\u5e8f\u5018\u82e5\u6267\u884c\u6210\u529f\uff0c\u5176\u56de\u4f20\u503c\u4e3a 0\uff1b\u5931\u8d25\u4e3a 1\u3002<\/p>\n
tar cvfz dfbackup.tar.gz \/home\/user > \/dev\/nullecho\"$?\"$$<\/pre>\n
\u7531\u4e8e\u8fdb\u7a0b\u7684ID\u662f\u552f\u4e00\u7684\uff0c\u6240\u4ee5\u5728\u540c\u4e00\u4e2a\u65f6\u95f4\uff0c\u4e0d\u53ef\u80fd\u6709\u91cd\u590d\u6027\u7684 PID\u3002\u6709\u65f6\uff0cscript\u4f1a\u9700\u8981\u4ea7\u751f\u4e34\u65f6\u6587\u4ef6\uff0c\u7528\u6765\u5b58\u653e\u5fc5\u8981\u7684\u8d44\u6599\u3002\u800c\u6b64script\u4ea6\u6709\u53ef\u80fd\u5728\u540c\u4e00\u65f6\u95f4\u88ab\u4f7f\u7528\u8005\u4eec\u4f7f\u7528\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u56fa\u5b9a\u6587\u4ef6\u540d\u5728\u5199\u6cd5\u4e0a\u5c31\u663e\u7684\u4e0d\u53ef\u9760\u3002\u552f\u6709\u4ea7\u751f\u52a8\u6001\u6587\u4ef6\u540d\uff0c\u624d\u80fd\u7b26\u5408\u9700\u8981\u3002\u7b26\u53f7$$\u6216\u8bb8\u53ef\u4ee5\u7b26\u5408\u8fd9\u79cd\u9700\u6c42\u3002\u5b83\u4ee3\u8868\u5f53\u524dshell \u7684 PID\u3002<\/p>\n
echo \"$HOSTNAME, $USER, $MAIL\" > ftmp.$$<\/pre>\n
\u4f7f\u7528\u5b83\u6765\u4f5c\u4e3a\u6587\u4ef6\u540d\u7684\u4e00\u90e8\u4efd\uff0c\u53ef\u4ee5\u907f\u514d\u5728\u540c\u4e00\u65f6\u95f4\uff0c\u4ea7\u751f\u76f8\u540c\u6587\u4ef6\u540d\u7684\u8986\u76d6\u73b0\u8c61\u3002<\/p>\n
ps: \u57fa\u672c\u4e0a\uff0c\u7cfb\u7edf\u4f1a\u56de\u6536\u6267\u884c\u5b8c\u6bd5\u7684 PID\uff0c\u7136\u540e\u518d\u6b21\u4f9d\u9700\u8981\u5206\u914d\u4f7f\u7528\u3002\u6240\u4ee5 script \u5373\u4f7f\u4e34\u65f6\u6587\u4ef6\u662f\u4f7f\u7528\u52a8\u6001\u6863\u540d\u7684\u5199\u6cd5\uff0c\u5982\u679cscript \u6267\u884c\u5b8c\u6bd5\u540e\u4ecd\u4e0d\u52a0\u4ee5\u6e05\u9664\uff0c\u4f1a\u4ea7\u751f\u5176\u4ed6\u95ee\u9898\u3002<\/p>\n
( ) \u6307\u4ee4\u7fa4\u7ec4 (command group)<\/strong><\/p>\n
\u7528\u62ec\u53f7\u5c06\u4e00\u4e32\u8fde\u7eed\u6307\u4ee4\u62ec\u8d77\u6765\uff0c\u8fd9\u79cd\u7528\u6cd5\u5bf9 shell \u6765\u8bf4\uff0c\u79f0\u4e3a\u6307\u4ee4\u7fa4\u7ec4\u3002\u5982\u4e0b\u9762\u7684\u4f8b\u5b50\uff1a(cd ~ ; vcgh=`pwd` ;echo $vcgh)\uff0c\u6307\u4ee4\u7fa4\u7ec4\u6709\u4e00\u4e2a\u7279\u6027\uff0cshell\u4f1a\u4ee5\u4ea7\u751f subshell\u6765\u6267\u884c\u8fd9\u7ec4\u6307\u4ee4\u3002\u56e0\u6b64\uff0c\u5728\u5176\u4e2d\u6240\u5b9a\u4e49\u7684\u53d8\u6570\uff0c\u4ec5\u4f5c\u7528\u4e8e\u6307\u4ee4\u7fa4\u7ec4\u672c\u8eab\u3002\u6211\u4eec\u6765\u770b\u4e2a\u4f8b\u5b50<\/p>\n
# cat ftmp-01#!\/bin\/basha=fsh(a=incg ; echo -e \"\\n $a \\n\")echo $a#.\/ftmp-01incgfsh<\/pre>\n
\u9664\u4e86\u4e0a\u8ff0\u7684\u6307\u4ee4\u7fa4\u7ec4\uff0c\u62ec\u53f7\u4e5f\u7528\u5728 array \u53d8\u6570\u7684\u5b9a\u4e49\u4e0a\uff1b\u53e6\u5916\u4e5f\u5e94\u7528\u5728\u5176\u4ed6\u53ef\u80fd\u9700\u8981\u52a0\u4e0aescape\u5b57\u5143\u624d\u80fd\u4f7f\u7528\u7684\u573a\u5408\uff0c\u5982\u8fd0\u7b97\u5f0f\u3002<\/p>\n
(( ))<\/strong><\/p>\n
\u8fd9\u7ec4\u7b26\u53f7\u7684\u4f5c\u7528\u4e0e let \u6307\u4ee4\u76f8\u4f3c\uff0c\u7528\u5728\u7b97\u6570\u8fd0\u7b97\u4e0a\uff0c\u662f bash \u7684\u5185\u5efa\u529f\u80fd\u3002\u6240\u4ee5\uff0c\u5728\u6267\u884c\u6548\u7387\u4e0a\u4f1a\u6bd4\u4f7f\u7528 let\u6307\u4ee4\u8981\u597d\u8bb8\u591a\u3002<\/p>\n
#!\/bin\/bash(( a = 10 ))echo -e \"inital value, a = $a\\n\"(( a++))echo \"after a++, a = $a\"<\/pre>\n
{ } \u5927\u62ec\u53f7 (Block of code)<\/strong><\/p>\n
\u6709\u65f6\u5019 script \u5f53\u4e2d\u4f1a\u51fa\u73b0\uff0c\u5927\u62ec\u53f7\u4e2d\u4f1a\u5939\u7740\u4e00\u6bb5\u6216\u51e0\u6bb5\u4ee5”\u5206\u53f7”\u505a\u7ed3\u5c3e\u7684\u6307\u4ee4\u6216\u53d8\u6570\u8bbe\u5b9a\u3002<\/p>\n
# cat ftmp-02#!\/bin\/basha=fsh{a=inbc ; echo -e \"\\n $a \\n\"}echo $a#.\/ftmp-02inbcinbc<\/pre>\n
\u8fd9\u79cd\u7528\u6cd5\u4e0e\u4e0a\u9762\u4ecb\u7ecd\u7684\u6307\u4ee4\u7fa4\u7ec4\u975e\u5e38\u76f8\u4f3c\uff0c\u4f46\u6709\u4e2a\u4e0d\u540c\u70b9\uff0c\u5b83\u5728\u5f53\u524d\u7684 shell \u6267\u884c\uff0c\u4e0d\u4f1a\u4ea7\u751f subshell\u3002<\/p>\n
\u5927\u62ec\u53f7\u4e5f\u88ab\u8fd0\u7528\u5728 “\u51fd\u6570” \u7684\u529f\u80fd\u4e0a\u3002\u5e7f\u4e49\u5730\u8bf4\uff0c\u5355\u7eaf\u53ea\u4f7f\u7528\u5927\u62ec\u53f7\u65f6\uff0c\u4f5c\u7528\u5c31\u50cf\u662f\u4e2a\u6ca1\u6709\u6307\u5b9a\u540d\u79f0\u7684\u51fd\u6570\u4e00\u822c\u3002\u56e0\u6b64\uff0c\u8fd9\u6837\u5199 script\u4e5f\u662f\u76f8\u5f53\u597d\u7684\u4e00\u4ef6\u4e8b\u3002\u5c24\u5176\u5bf9\u8f93\u51fa\u8f93\u5165\u7684\u91cd\u5bfc\u5411\u4e0a\uff0c\u8fd9\u4e2a\u505a\u6cd5\u53ef\u7cbe\u7b80 script \u7684\u590d\u6742\u5ea6\u3002<\/p>\n
\u6b64\u5916\uff0c\u5927\u62ec\u53f7\u8fd8\u6709\u53e6\u4e00\u79cd\u7528\u6cd5\uff0c\u5982\u4e0b<\/p>\n
{xx,yy,zz,...}<\/pre>\n
\u8fd9\u79cd\u5927\u62ec\u53f7\u7684\u7ec4\u5408\uff0c\u5e38\u7528\u5728\u5b57\u4e32\u7684\u7ec4\u5408\u4e0a\uff0c\u6765\u770b\u4e2a\u4f8b\u5b50<\/p>\n
mkdir {userA,userB,userC}-{home,bin,data}<\/pre>\n
\u6211\u4eec\u5f97\u5230 userA-home, userA-bin, userA-data, userB-home, userB-bin,userB-data, userC-home, userC-bin,userC-data\uff0c\u8fd9\u51e0\u4e2a\u76ee\u5f55\u3002\u8fd9\u7ec4\u7b26\u53f7\u5728\u9002\u7528\u6027\u4e0a\u76f8\u5f53\u5e7f\u6cdb\u3002\u80fd\u52a0\u4ee5\u5584\u7528\u7684\u8bdd\uff0c\u56de\u62a5\u662f\u7cbe\u7b80\u4e0e\u6548\u7387\u3002\u50cf\u4e0b\u9762\u7684\u4f8b\u5b50<\/p>\n
chown root \/usr\/{ucb\/{ex,edit},lib\/{ex?.?*,how_ex}}<\/pre>\n
\u5982\u679c\u4e0d\u662f\u56e0\u4e3a\u652f\u63f4\u8fd9\u79cd\u7528\u6cd5\uff0c\u6211\u4eec\u5f97\u5199\u51e0\u884c\u91cd\u590d\u51e0\u6b21\u5440<\/p>\n
[ ] \u4e2d\u62ec\u53f7<\/strong><\/p>\n
\u5e38\u51fa\u73b0\u5728\u6d41\u7a0b\u63a7\u5236\u4e2d\uff0c\u626e\u6f14\u62ec\u4f4f\u5224\u65ad\u5f0f\u7684\u4f5c\u7528\u3002if [ “$?” != 0 ]thenecho “Executes error”exit1fi<\/p>\n
\u8fd9\u4e2a\u7b26\u53f7\u5728\u6b63\u5219\u8868\u8fbe\u5f0f\u4e2d\u62c5\u4efb\u7c7b\u4f3c “\u8303\u56f4” \u6216 “\u96c6\u5408” \u7684\u89d2\u8272<\/p>\n
rm -r 200[1234]<\/pre>\n
\u4e0a\u4f8b\uff0c\u4ee3\u8868\u5220\u9664 2001, 2002, 2003, 2004 \u7b49\u76ee\u5f55\u7684\u610f\u601d<\/p>\n
[[ ]]<\/strong><\/p>\n
\u8fd9\u7ec4\u7b26\u53f7\u4e0e\u5148\u524d\u7684 [] \u7b26\u53f7\uff0c\u57fa\u672c\u4e0a\u4f5c\u7528\u76f8\u540c\uff0c\u4f46\u5979\u5141\u8bb8\u5728\u5176\u4e2d\u76f4\u63a5\u4f7f\u7528 || \u4e0e&& \u903b\u8f91\u7b49\u7b26\u53f7\u3002<\/p>\n
#!\/bin\/bashread akif [[ $ak > 5 || $ak< 9 ]]thenecho $akfi<\/pre>\n
|| \u903b\u8f91\u7b26\u53f7<\/strong><\/p>\n
\u8fd9\u4e2a\u4f1a\u65f6\u5e38\u770b\u5230\uff0c\u4ee3\u8868 or \u903b\u8f91\u7684\u7b26\u53f7<\/p>\n
&& \u903b\u8f91\u7b26\u53f7<\/strong><\/p>\n
\u8fd9\u4e2a\u4e5f\u4f1a\u5e38\u770b\u5230\uff0c\u4ee3\u8868 and \u903b\u8f91\u7684\u7b26\u53f7<\/p>\n
& \u540e\u53f0\u5de5\u4f5c<\/strong><\/p>\n
\u5355\u4e00\u4e2a& \u7b26\u53f7\uff0c\u4e14\u653e\u5728\u5b8c\u6574\u6307\u4ee4\u5217\u7684\u6700\u540e\u7aef\uff0c\u5373\u8868\u793a\u5c06\u8be5\u6307\u4ee4\u5217\u653e\u5165\u540e\u53f0\u4e2d\u5de5\u4f5c\u3002<\/p>\n
tar cvfz data.tar.gz data > \/dev\/null&<\/pre>\n
<\u2026> \u5355\u5b57\u8fb9\u754c<\/strong><\/p>\n
\u8fd9\u7ec4\u7b26\u53f7\u5728\u89c4\u5219\u8868\u8fbe\u5f0f\u4e2d\uff0c\u88ab\u5b9a\u4e49\u4e3a”\u8fb9\u754c”\u7684\u610f\u601d\u3002\u8b6c\u5982\uff0c\u5f53\u6211\u4eec\u60f3\u627e\u5bfb the \u8fd9\u4e2a\u5355\u5b57\u65f6\uff0c\u5982\u679c\u6211\u4eec\u7528<\/p>\n
grep the FileA<\/pre>\n
\u4f60\u5c06\u4f1a\u53d1\u73b0\uff0c\u50cf there \u8fd9\u7c7b\u7684\u5355\u5b57\uff0c\u4e5f\u4f1a\u88ab\u5f53\u6210\u662f\u5339\u914d\u7684\u5355\u5b57\u3002\u56e0\u4e3a the \u6b63\u5de7\u662f there\u7684\u4e00\u90e8\u4efd\u3002\u5982\u679c\u6211\u4eec\u8981\u5fc5\u514d\u8fd9\u79cd\u60c5\u51b5\uff0c\u5c31\u5f97\u52a0\u4e0a “\u8fb9\u754c” \u7684\u7b26\u53f7<\/p>\n
grep '\\' FileA<\/pre>\n
    \n
  • \n
    \u52a0\u53f7 (plus)<\/p>\n<\/li>\n<\/ul>\n
    \u5728\u8fd0\u7b97\u5f0f\u4e2d\uff0c\u5979\u7528\u6765\u8868\u793a \"\u52a0\u6cd5\"\u3002expr 1 + 2 + 3\n\u6b64\u5916\u5728\u89c4\u5219\u8868\u8fbe\u5f0f\u4e2d\uff0c\u7528\u6765\u8868\u793a\"\u5f88\u591a\u4e2a\"\u7684\u524d\u9762\u5b57\u5143\u7684\u610f\u601d\u3002\n# grep '10\\+9' fileB109100910000910000931010009#\u8fd9\u4e2a\u7b26\u53f7\u5728\u4f7f\u7528\u65f6\uff0c\u524d\u9762\u5fc5\u987b\u52a0\u4e0aescape \u5b57\u5143\u3002<\/pre>\n
      \n
    • \n
      \u51cf\u53f7 (dash)<\/p>\n<\/li>\n<\/ul>\n
      \u5728\u8fd0\u7b97\u5f0f\u4e2d\uff0c\u5979\u7528\u6765\u8868\u793a \"\u51cf\u6cd5\"\u3002\nexpr 10 - 2\n\u6b64\u5916\u4e5f\u662f\u7cfb\u7edf\u6307\u4ee4\u7684\u9009\u9879\u7b26\u53f7\u3002\nls -expr 10 - 2\n\u5728 GNU \u6307\u4ee4\u4e2d\uff0c\u5982\u679c\u5355\u72ec\u4f7f\u7528 - \u7b26\u53f7\uff0c\u4e0d\u52a0\u4efb\u4f55\u8be5\u52a0\u7684\u6587\u4ef6\u540d\u79f0\u65f6\uff0c\u4ee3\u8868\"\u6807\u51c6\u8f93\u5165\"\u7684\u610f\u601d\u3002\u8fd9\u662f GNU\u6307\u4ee4\u7684\u5171\u901a\u9009\u9879\u3002\u8b6c\u5982\u4e0b\u4f8b\ntar xpvf -\n\u8fd9\u91cc\u7684 - \u7b26\u53f7\uff0c\u65e2\u4ee3\u8868\u4ece\u6807\u51c6\u8f93\u5165\u8bfb\u53d6\u8d44\u6599\u3002\n\u4e0d\u8fc7\uff0c\u5728 cd \u6307\u4ee4\u4e2d\u5219\u6bd4\u8f83\u7279\u522b\ncd -\n\u8fd9\u4ee3\u8868\u53d8\u66f4\u5de5\u4f5c\u76ee\u5f55\u5230\"\u4e0a\u4e00\u6b21\"\u5de5\u4f5c\u76ee\u5f55\u3002<\/pre>\n
      % \u9664\u6cd5 (Modulo)<\/strong><\/p>\n
      \u5728\u8fd0\u7b97\u5f0f\u4e2d\uff0c\u7528\u6765\u8868\u793a “\u9664\u6cd5”\u3002<\/p>\n
      expr 10 % 2<\/pre>\n
      \u6b64\u5916\uff0c\u4e5f\u88ab\u8fd0\u7528\u5728\u5173\u4e8e\u53d8\u91cf\u7684\u89c4\u5219\u8868\u8fbe\u5f0f\u5f53\u4e2d\u7684\u4e0b\u5217<\/p>\n
      ${parameter%word}${parameter%%word}<\/pre>\n
      \u4e00\u4e2a % \u8868\u793a\u6700\u77ed\u7684 word \u5339\u914d\uff0c\u4e24\u4e2a\u8868\u793a\u6700\u957f\u7684 word \u5339\u914d\u3002<\/p>\n
      = \u7b49\u53f7 (Equals)<\/strong><\/p>\n
      \u5e38\u5728\u8bbe\u5b9a\u53d8\u6570\u65f6\u770b\u5230\u7684\u7b26\u53f7\u3002<\/p>\n
      vara=123echo \" vara = $vara\"<\/pre>\n
      \u6216\u8005\u50cf\u662f PATH \u7684\u8bbe\u5b9a\uff0c\u751a\u81f3\u5e94\u7528\u5728\u8fd0\u7b97\u6216\u5224\u65ad\u5f0f\u7b49\u6b64\u7c7b\u7528\u9014\u4e0a\u3002<\/p>\n
      == \u7b49\u53f7 (Equals)<\/strong><\/p>\n
      \u5e38\u5728\u6761\u4ef6\u5224\u65ad\u5f0f\u4e2d\u770b\u5230\uff0c\u4ee3\u8868 “\u7b49\u4e8e” \u7684\u610f\u601d\u3002<\/p>\n
      if [ $vara == $varb ]...\u4e0b\u7565<\/pre>\n
      != \u4e0d\u7b49\u4e8e<\/strong><\/p>\n
      \u5e38\u5728\u6761\u4ef6\u5224\u65ad\u5f0f\u4e2d\u770b\u5230\uff0c\u4ee3\u8868 “\u4e0d\u7b49\u4e8e” \u7684\u610f\u601d\u3002<\/p>\n
      if [ $vara != $varb ]...\u4e0b\u7565<\/pre>\n
      ^<\/strong><\/p>\n
      \u8fd9\u4e2a\u7b26\u53f7\u5728\u89c4\u5219\u8868\u8fbe\u5f0f\u4e2d\uff0c\u4ee3\u8868\u884c\u7684 “\u5f00\u5934” \u4f4d\u7f6e\uff0c\u5728[]\u4e2d\u4e5f\u4e0e”!”(\u53f9\u53f7)\u4e00\u6837\u8868\u793a\u201c\u975e\u201d<\/p>\n
      \u8f93\u51fa\/\u8f93\u5165\u91cd\u5bfc\u5411<\/strong><\/p>\n
      \n
      >      >>   <   <<   :>   &>   2&>   2<>>&   >&2<\/p>\n<\/blockquote>\n
      \u6587\u4ef6\u63cf\u8ff0\u7b26(File Descriptor)\uff0c\u7528\u4e00\u4e2a\u6570\u5b57\uff08\u901a\u5e38\u4e3a0-9\uff09\u6765\u8868\u793a\u4e00\u4e2a\u6587\u4ef6\u3002<\/p>\n
      \u5e38\u7528\u7684\u6587\u4ef6\u63cf\u8ff0\u7b26\u5982\u4e0b\uff1a<\/p>\n
      \u6587\u4ef6\u63cf\u8ff0\u7b26          \u540d\u79f0         \u5e38\u7528\u7f29\u5199     \u9ed8\u8ba4\u503c\n     0               \u6807\u51c6\u8f93\u5165      stdin            \u952e\u76d8\n     1               \u6807\u51c6\u8f93\u51fa      stdout         \u5c4f\u5e55\n     2            \u6807\u51c6\u9519\u8bef\u8f93\u51fa   stderr          \u5c4f\u5e55<\/pre>\n
      \u6211\u4eec\u5728\u7b80\u5355\u5730\u7528<\u6216>\u65f6\uff0c\u76f8\u5f53\u4e8e\u4f7f\u7528 0< \u6216 1>\uff08\u4e0b\u9762\u4f1a\u8be6\u7ec6\u4ecb\u7ecd\uff09\u3002<\/p>\n
        \n
      • \n
        * cmd > file<\/p>\n
        \u628acmd\u547d\u4ee4\u7684\u8f93\u51fa\u91cd\u5b9a\u5411\u5230\u6587\u4ef6file\u4e2d\u3002\u5982\u679cfile\u5df2\u7ecf\u5b58\u5728\uff0c\u5219\u6e05\u7a7a\u539f\u6709\u6587\u4ef6\uff0c\u4f7f\u7528bash\u7684noclobber\u9009\u9879\u53ef\u4ee5\u9632\u6b62\u590d\u76d6\u539f\u6709\u6587\u4ef6\u3002<\/p>\n<\/li>\n
      • \n
        * cmd >> file<\/p>\n
        \u628acmd\u547d\u4ee4\u7684\u8f93\u51fa\u91cd\u5b9a\u5411\u5230\u6587\u4ef6file\u4e2d\uff0c\u5982\u679cfile\u5df2\u7ecf\u5b58\u5728\uff0c\u5219\u628a\u4fe1\u606f\u52a0\u5728\u539f\u6709\u6587\u4ef6\u5f8c\u9762\u3002<\/p>\n<\/li>\n
      • \n
        * cmd < file<\/p>\n
        \u4f7fcmd\u547d\u4ee4\u4ecefile\u8bfb\u5165<\/p>\n<\/li>\n
      • \n
        * cmd << text<\/p>\n
        \u4ece\u547d\u4ee4\u884c\u8bfb\u53d6\u8f93\u5165\uff0c\u76f4\u5230\u4e00\u4e2a\u4e0etext\u76f8\u540c\u7684\u884c\u7ed3\u675f\u3002\u9664\u975e\u4f7f\u7528\u5f15\u53f7\u628a\u8f93\u5165\u62ec\u8d77\u6765\uff0c\u6b64\u6a21\u5f0f\u5c06\u5bf9\u8f93\u5165\u5185\u5bb9\u8fdb\u884cshell\u53d8\u91cf\u66ff\u6362\u3002\u5982\u679c\u4f7f\u7528<<- \uff0c\u5219\u4f1a\u5ffd\u7565\u63a5\u4e0b\u6765\u8f93\u5165\u884c\u9996\u7684tab\uff0c\u7ed3\u675f\u884c\u4e5f\u53ef\u4ee5\u662f\u4e00\u5806tab\u518d\u52a0\u4e0a\u4e00\u4e2a\u4e0etext\u76f8\u540c\u7684\u5185\u5bb9\uff0c\u53ef\u4ee5\u53c2\u8003\u5f8c\u9762\u7684\u4f8b\u5b50\u3002<\/p>\n<\/li>\n
      • \n
        * cmd <<< word<\/p>\n
        \u628aword\uff08\u800c\u4e0d\u662f\u6587\u4ef6word\uff09\u548c\u5f8c\u9762\u7684\u6362\u884c\u4f5c\u4e3a\u8f93\u5165\u63d0\u4f9b\u7ed9cmd\u3002<\/p>\n<\/li>\n
      • \n
        * cmd <> file<\/p>\n
        \u4ee5\u8bfb\u5199\u6a21\u5f0f\u628a\u6587\u4ef6file\u91cd\u5b9a\u5411\u5230\u8f93\u5165\uff0c\u6587\u4ef6file\u4e0d\u4f1a\u88ab\u7834\u574f\u3002\u4ec5\u5f53\u5e94\u7528\u7a0b\u5e8f\u5229\u7528\u4e86\u8fd9\u4e00\u7279\u6027\u65f6\uff0c\u5b83\u624d\u662f\u6709\u610f\u4e49\u7684\u3002<\/p>\n<\/li>\n
      • \n
        * cmd >| file<\/p>\n
        \u529f\u80fd\u540c>\uff0c\u4f46\u5373\u4fbf\u5728\u8bbe\u7f6e\u4e86noclobber\u65f6\u4e5f\u4f1a\u590d\u76d6file\u6587\u4ef6\uff0c\u6ce8\u610f\u7528\u7684\u662f|\u800c\u975e\u4e00\u4e9b\u4e66\u4e2d\u8bf4\u7684!\uff0c\u76ee\u524d\u4ec5\u5728csh\u4e2d\u4ecd\u6cbf\u7528>!\u5b9e\u73b0\u8fd9\u4e00\u529f\u80fd\u3002<\/p>\n<\/li>\n
      • \n
        : > filename      \u628a\u6587\u4ef6”filename”\u622a\u65ad\u4e3a0\u957f\u5ea6.# \u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728, \u90a3\u4e48\u5c31\u521b\u5efa\u4e00\u4e2a0\u957f\u5ea6\u7684\u6587\u4ef6(\u4e0e’touch’\u7684\u6548\u679c\u76f8\u540c).<\/p>\n<\/li>\n
      • \n
        cmd >&n \u628a\u8f93\u51fa\u9001\u5230\u6587\u4ef6\u63cf\u8ff0\u7b26n<\/p>\n<\/li>\n
      • \n
        cmd m>&n \u628a\u8f93\u51fa \u5230\u6587\u4ef6\u7b26m\u7684\u4fe1\u606f\u91cd\u5b9a\u5411\u5230\u6587\u4ef6\u63cf\u8ff0\u7b26n<\/p>\n<\/li>\n
      • \n
        cmd >&- \u5173\u95ed\u6807\u51c6\u8f93\u51fa<\/p>\n<\/li>\n
      • \n
        cmd <&n \u8f93\u5165\u6765\u81ea\u6587\u4ef6\u63cf\u8ff0\u7b26n<\/p>\n<\/li>\n
      • \n
        cmd m<&n m\u6765\u81ea\u6587\u4ef6\u63cf\u8ff0\u5404\u4e2an<\/p>\n<\/li>\n
      • \n
        cmd <&- \u5173\u95ed\u6807\u51c6\u8f93\u5165<\/p>\n<\/li>\n
      • \n
        cmd <&n- \u79fb\u52a8\u8f93\u5165\u6587\u4ef6\u63cf\u8ff0\u7b26n\u800c\u975e\u590d\u5236\u5b83\u3002\uff08\u9700\u8981\u89e3\u91ca\uff09<\/p>\n<\/li>\n
      • \n
        cmd >&n- \u79fb\u52a8\u8f93\u51fa\u6587\u4ef6\u63cf\u8ff0\u7b26 n\u800c\u975e\u590d\u5236\u5b83\u3002\uff08\u9700\u8981\u89e3\u91ca\uff09<\/p>\n<\/li>\n<\/ul>\n
        \u6ce8\u610f\uff1a >&\u5b9e\u9645\u4e0a\u590d\u5236\u4e86\u6587\u4ef6\u63cf\u8ff0\u7b26\uff0c\u8fd9\u4f7f\u5f97cmd > file 2>&1\u4e0ecmd 2>&1 >file\u7684\u6548\u679c\u4e0d\u4e00\u6837\u3002<\/p>\n
        \u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300alinux\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u53ca\u542b\u4e49\u662f\u4ec0\u4e48\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u7c73\u4e91\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03\u6587\u7ae0\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
        linux\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u53ca\u542b\u4e49\u662f\u4ec0\u4e48 \u4eb2\u7231\u7684\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5982\u679c\u4f60\u70b9\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u8bf4\u660e\u4f60\u5bf9\u300alinux\u4e2d\u7684\u7279\u6b8a\u5b57\u7b26\u53ca\u542b\u4e49\u662f\u4ec0\u4e48\u300b\u5f88\u611f\u5174\u8da3\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u7ed9\u5927\u5bb6\u8be6\u7ec6\u89e3\u6790\u4e00\u4e0b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u6240\u6709\u8ba4\u771f\u8bfb\u5b8c\u7684\u7ae5\u978b\u4eec\uff0c\u90fd\u6709\u5b9e\u8d28\u6027\u7684\u63d0\u9ad8\u3002 linux\u7684\u7279\u6b8a\u5b57\u7b26\uff1a1\u3001\u201c#\u201d\u6ce8\u91ca\u5b57\u7b26\uff1b2\u3001\u201c~\u201d\uff0c\u4ee3\u8868\u7528\u6237\u7684home\u76ee\u5f55\uff1b3\u3001\u201c;\u201d\uff0c\u662f\u62c5\u4efb\u201c\u8fde\u7eed\u6307\u4ee4\u201d\u529f\u80fd\u7684\u7b26\u53f7\uff1b4\u3001\u201c\/\u201d\uff0c\u8def\u5f84\u76ee\u5f55\u5206\u9694\u7b26\uff1b5\u3001\u201c\\\u201d\uff0c\u8f6c\u4e49\u7b26\uff1b6\u3001\u201c|\u201d\uff0c\u7ba1\u9053\u7b26\uff1b7\u3001\u201c.\u201d\uff0c\u4ee3\u8868\u5f53\u524d\u76ee\u5f55\uff1b8\u3001\u201c..\u201d\uff0c\u4ee3\u8868\u7236\u76ee\u5f55\uff0c\u4e5f\u5c31\u662f\u5f53\u524d\u76ee\u5f55\u7684\u4e0a\u4e00\u7ea7\u76ee\u5f55\uff1b9\u3001\u201c?\u201d\uff0c\u6307\u7684\u662f\u5355\u5b57\u7b26\u901a\u914d\u7b26\uff0c\u4ee3\u8868\u6587\u4ef6\u540d\u4e2d\u4efb\u610f\u4e00\u4e2a\u5b57\u7b26\u7684\u5339\u914d\uff1b10\u3001\u201c*\u201d\uff0c\u4ee3\u8868\u4efb\u610f\u5b57\u7b26\u5e8f\u5217\uff0c\u5339\u914d\u4efb\u610f\u5b57\u7b26\u7b49\u3002 linux\u7279\u6b8a\u7b26\u53f7\u4f7f\u7528\u53ca\u542b\u4e49 #\uff1a \u4ee5 # \u5f00\u5934\uff0c\u4ee3\u8868\u8fd9\u53e5\u8bdd\u662f\u6ce8\u91ca\u3002 #\uff01\/bin\/bash \u5e38\u51fa\u73b0\u5728\u547d\u4ee4\u4e4b\u524d\uff0c\u6216\u8005\u547d\u4ee4\u4e4b\u540e\uff0c\u540e\u9762\u662f\u6ce8\u91ca\u6587\u5b57\uff0c\u4e0d\u4f1a\u88ab\u6267\u884c #\u5f53\u8f93\u5165\u7684\u547d\u4ee4\u4e0d\u60f3\u88ab\u6267\u884c\u65f6\u8f93\u5165\uff08#\uff09\u5c31\u884c\u4e86 #This line is comments.\uff08\u8fd9\u662f\u4e00\u884c\u6ce8\u91ca\uff09 \u867d\u7136\u4e0a\u9762\u90a3\u6bb5\u8bdd\u5c31\u88ab\u5ffd\u7565\u4e86\uff0c\u4f46\u5b83\u8fd8\u662f\u4f1a\u6dfb\u52a0\u5230\u60a8\u7684\u547d\u4ee4\u5386\u53f2\u8bb0\u5f55\u4e2d\u3002 \u66f4\u5389\u5bb3\u7684\u505a\u6cd5\u5982\u4e0b\uff1a \u5148\u5b9a\u4e49\u4e00\u4e2a\u53d8\u91cf\u5e76\u7ed9\u5b83\u8d4b\u503c\u5b57\u7b26\u4e32 \u201camazing alvin\u201d this_string=”amazing alvin” ${this_string#amazing} \u8fd4\u56de\u7684\u662f\u88ab\u6ce8\u91ca\u6389 amazing \u7684 this_string \u5b57\u7b26\u4e32\u53d8\u91cf\uff0c\u53ef\u4ee5 echo \u8f93\u51fa\u770b\u4e0b\u7ed3\u679c\uff1a echo awsome ${this_string#amazing} amazing \u53ea\u662f\u88ab\u6ce8\u91ca\u6389\u800c\u5df2\uff0c\u5b83\u5e76\u672a\u88ab\u5220\u9664\uff0c\u53bb\u6389\u6ce8\u91ca\u5b83\u5c31\u56de\u6765\u4e86\uff1a echo $this_string ~ ~ \u4ee3\u8868\u7528\u6237\u7684home\u76ee\u5f55\uff0c\u6307\u7684\u662f\u4e3b\u76ee\u5f55\uff0c\u4e5f\u5c31\u662f\u6211\u4eec\u7528\u6237\u7684\u4e2a\u4eba\u76ee\u5f55\uff0c\u65e0\u8bba\u4f60\u8eab\u5728\u4f55\u65b9\uff0c\u8f93\u5165 cd ~ \u5b83\u5c06\u5e26\u4f60\u56de\u5bb6\uff01 cd ~ \u66f4\u9ad8\u7aef\u7684\u73a9\u6cd5\u5c31\u662f\u5728\u5b83\u540e\u9762\u52a0\u4e0a\u5177\u4f53\u7684\u8def\u5f84\uff0c\u76f4\u63a5\u5b9a\u4f4d\u5230\u5bb6\u76ee\u5f55\u4e2d\u7684\u6307\u5b9a\u4f4d\u7f6e\uff0c\u662f\u4e0d\u662f\u5f88\u65b9\u4fbf\u5462\uff1f cd ~\/work\/archive \uff1b\u5206\u53f7 \u5728 shell \u4e2d\uff0c\u62c5\u4efb”\u8fde\u7eed\u6307\u4ee4”\u529f\u80fd\u7684\u7b26\u53f7\u5c31\u662f”\u5206\u53f7”\u3002 \u8fd9\u8ddf\u6211\u4eec\u65e5\u5e38\u4f7f\u7528\u7684 “;” \u5dee\u4e0d\u591a\uff0c\u5c31\u4e0d\u7ec6\u8bf4\u4e86\uff0c\u4e3b\u8981\u662f\u7528\u6765\u5206\u9694\u547d\u4ee4\u7684\u3002 ls > count.txt; wc -l count.txt; rm count.txt \u8fd9\u91cc\u6ce8\u610f\uff0c\u7528 ; \u5206\u9694\u547d\u4ee4\u65f6\uff0c\u5373\u4f7f\u7b2c\u4e00\u4e2a\u547d\u4ee4\u5931\u8d25\uff0c\u7b2c\u4e8c\u4e2a\u547d\u4ee4\u4e5f\u4f1a\u8fd0\u884c\uff0c\u5373\u4f7f\u7b2c\u4e8c\u4e2a\u547d\u4ee4\u5931\u8d25\uff0c\u7b2c\u4e09\u4e2a\u547d\u4ee4\u4e5f\u4f1a\u8fd0\u884c\uff0c\u4f9d\u6b64\u7c7b\u63a8\u3002 \u5982\u679c\u8981\u5728\u4e00\u4e2a\u547d\u4ee4\u5931\u8d25\u7684\u60c5\u51b5\u4e0b\u5c31\u505c\u6b62\uff0c\u8bf7\u4f7f\u7528 “&&” \uff0c\u5982\u4e0b\uff1a cd .\/doesntexist && cp ~\/Documents\/reports\/* . \uff1b\uff1b\u8fde\u7eed\u5206\u53f7 (Terminator) […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-51979","post","type-post","status-publish","format-standard","hentry","category-os"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/51979","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=51979"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/51979\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=51979"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=51979"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=51979"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}