{"id":192,"date":"2024-05-11T13:48:45","date_gmt":"2024-05-11T05:48:45","guid":{"rendered":"https:\/\/www.xxiaoteng.cn\/?p=192"},"modified":"2026-05-11T18:50:18","modified_gmt":"2026-05-11T10:50:18","slug":"shell%e4%b8%ad%e7%9a%84%e5%88%a4%e6%96%ad%e8%af%ad%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/www.xxiaoteng.cn\/?p=192","title":{"rendered":"Shell\u4e2d\u7684\u5224\u65ad\u8bed\u53e5"},"content":{"rendered":"\n

\u5224\u65ad\u8bed\u53e5\uff1a\u89e3\u51b3\u4e1a\u52a1\u903b\u8f91\u4e2d\u7684\u5224\u65ad\u95ee\u9898<\/p>\n\n\n\n

1.<\/strong> \u57fa\u672c\u8bed\u6cd5<\/h2>\n\n\n\n
\u8bed\u6cd5\u683c\u5f0f\u4e00\uff1a\ntest  \u6761\u4ef6\u8868\u8fbe\u5f0f\n\n\u8bed\u6cd5\u683c\u5f0f\u4e8c\uff1a\n[ \u6761\u4ef6\u8868\u8fbe\u5f0f ]\uff0c\u6ce8\u610f\uff1a\u5224\u65ad\u8bed\u53e5\u4e24\u8fb9\u5fc5\u987b\u4fdd\u7559\u4e00\u4e2a\u7a7a\u683c\n\n\u8bed\u6cd5\u683c\u5f0f\u4e09\uff1a\n[[ \u6761\u4ef6\u8868\u8fbe\u5f0f ]]  \u652f\u6301\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u6ce8\u610f\uff1a\u5224\u65ad\u8bed\u53e5\u4e24\u8fb9\u5fc5\u987b\u4fdd\u7559\u4e00\u4e2a\u7a7a\u683c\n\n\u5f3a\u8c03\uff1a\u4ee5\u4e0a\u5224\u65ad\u8bed\u53e5\uff0c\u5982\u679c\u5224\u65ad\u4e3a\u771f\uff08\u8fd4\u56de\u4e3a0\uff09\uff0c\u53cd\u4e4b\u5219\u8fd4\u56de\uff08\u975e0\uff09<\/code><\/pre>\n\n\n\n
2.<\/strong> \u6587\u4ef6\u5b58\u5728\u4e0e\u5426\u5224\u65ad\uff08\u91cd\u70b9\uff09<\/h2>\n\n\n\n
\u9762\u8bd5\uff1a\u4f60\u719f\u6089Shell\u811a\u672c\uff0c\u5982\u4f55\u5224\u65ad\u4e00\u4e2a\u6587\u4ef6\u662f\u5426\u5b58\u5728\uff1f<\/p>\n\n\n\n
\u7b54\uff1a-e\uff08exist\u5224\u65ad\u662f\u5426\u5b58\u5728\uff09<\/p>\n\n\n\n
-e        exist\uff0c\u662f\u5426\u5b58\u5728  \u4e0d\u7ba1\u662f\u6587\u4ef6\u8fd8\u662f\u76ee\u5f55\uff0c\u53ea\u8981\u5b58\u5728\uff0c\u6761\u4ef6\u5c31\u6210\u7acb-f        file\uff0c\u662f\u5426\u4e3a\u666e\u901a\u6587\u4ef6-d        directory\uff0c\u662f\u5426\u4e3a\u76ee\u5f55\n--------------------------------------------------------------------------------------------------------------------\n-S        socket\uff0c\u662f\u5426\u4e3a\u5957\u63a5\u5b57\u6587\u4ef6 => MySQL => mysql.sock\u8fd9\u4e2a\u6587\u4ef6\u5c31\u662f\u5957\u63a5\u5b57\uff08\u5ba2\u6237\u7aef\u8fde\u63a5\u670d\u52a1\u5668\u7aef\u6865\u6881\uff09\n-c        character\uff0c\u662f\u5426\u4e3a\u5b57\u7b26\u8bbe\u5907\n-b        block\uff0c\u662f\u5426\u4e3a\u5757\u8bbe\u5907\u6587\u4ef6\uff0c\u5982\/dev\/sda\n-L        link\uff0c\u662f\u5426\u4e3a\u8f6f\u94fe\u63a5\u6587\u4ef6\uff08\u5feb\u6377\u65b9\u5f0f\uff09\n\n\u8bb0\u4f4f\uff1a-e\u3001-f\u3001-d\u3001-L<\/code><\/pre>\n\n\n\n
\n
character\u662f\u6307\u76f4\u63a5\u4e0e\u786c\u4ef6\u8bbe\u5907\u8fdb\u884c\u4ea4\u4e92\u7684\u6587\u4ef6\uff0c\u6309\u5b57\u7b26\u6d41\u7684\u65b9\u5f0f\u8bfb\u5199\u6570\u636e\u3002\u5b57\u7b26\u8bbe\u5907\u901a\u5e38\u7528\u4e8e\u8bbf\u95ee\u4e32\u884c\u7aef\u53e3\u3001\u952e\u76d8\u3001\u7ec8\u7aef\u7b49\u8bbe\u5907\uff0c\u5982\/dev\/tty\u7ec8\u7aef\u8bbe\u5907\uff0c\/dev\/null\u7a7a\u8bbe\u5907<\/p>\n<\/blockquote>\n\n\n\n
\u4e09\u79cd\u8bed\u6cd5\u683c\u5f0f\uff1a<\/p>\n\n\n\n
test -e file                        \u53ea\u8981\u6587\u4ef6\u5b58\u5728\u6761\u4ef6\u4e3a\u771f\n[ -d \/shell01\/dir1 ]                \u5224\u65ad\u76ee\u5f55\u662f\u5426\u5b58\u5728\uff0c\u5b58\u5728\u6761\u4ef6\u4e3a\u771f\n[ ! -d \/shell01\/dir1 ]                \u5224\u65ad\u76ee\u5f55\u662f\u5426\u5b58\u5728,\u4e0d\u5b58\u5728\u6761\u4ef6\u4e3a\u771f\n[[ -f \/shell01\/1.sh ]]                \u5224\u65ad\u6587\u4ef6\u662f\u5426\u5b58\u5728\uff0c\u5e76\u4e14\u662f\u4e00\u4e2a\u666e\u901a\u7684\u6587\u4ef6\n\n\u5f3a\u8c03\u5224\u65ad\u8fc7\u7a0b\u4e2d\uff0c\u5982\u679c\u524d\u9762\u6dfb\u52a0\u4e86\u4e00\u4e2a\uff01\u4ee3\u8868\u53d6\u53cd<\/code><\/pre>\n\n\n\n
-s \u5224\u65ad\u6587\u4ef6\u662f\u5426\u6709\u5185\u5bb9\uff08\u5927\u5c0f\uff09\uff0c\u975e\u7a7a\u6587\u4ef6\u6761\u4ef6\u6ee1\u8db3<\/p>\n\n\n\n
\u8bf4\u660e\uff1a-s\u8868\u793a\u975e\u7a7a\uff0c\uff01 -s \u8868\u793a\u7a7a\u6587\u4ef6<\/p>\n\n\n\n
\u8bf4\u660e\uff1a1.sh\u6587\u4ef6\u91cc\u6709\u5185\u5bb9\u7684<\/p>\n\n\n\n
[root@itheima]# test -s 1.sh\n[root@itheima]# echo $?\n0\n[root@itheima]# touch aaa\n[root@itheima]# cat aaa\n[root@itheima]# test -s aaa\n[root@itheima]# echo $?\n1\n[root@itheima]# test ! -s aaa\n[root@itheima]# echo $?\n0\n[root@itheima]# test ! -s 1.sh\n[root@itheima]# echo $?\n1<\/code><\/pre>\n\n\n\n
3.<\/strong> \u6587\u4ef6\u6743\u9650\u5224\u65ad<\/h2>\n\n\n\n
itheima\/readme.txt<\/p>\n\n\n\n
-r        \u5f53\u524d\u7528\u6237\u5bf9\u5176\u662f\u5426\u53ef\u8bfb\n-w        \u5f53\u524d\u7528\u6237\u5bf9\u5176\u662f\u5426\u53ef\u5199\n-x        \u5f53\u524d\u7528\u6237\u5bf9\u5176\u662f\u5426\u53ef\u6267\u884c<\/code><\/pre>\n\n\n\n
\u6848\u4f8b\uff1a<\/p>\n\n\n\n
\u5224\u65ad\u662f\u5426\u6709\u8bfb\u6743\u9650<\/p>\n\n\n\n
test -r \/etc\/passwd<\/code><\/pre>\n\n\n\n
\u5224\u65ad\u662f\u5426\u6709\u5199\u6743\u9650<\/p>\n\n\n\n
test -w \/tmp\/testfile<\/code><\/pre>\n\n\n\n
\u5224\u65ad\u662f\u5426\u6709\u6267\u884c\u6743\u9650<\/p>\n\n\n\n
test -x \/bin\/bash<\/code><\/pre>\n\n\n\n
4.<\/strong> \u4e24\u4e2a\u6587\u4ef6\u65b0\u65e7\u6bd4\u8f83<\/h2>\n\n\n\n
\u65b0\u65e7\uff1a\u6307\u7684\u662f\u6587\u4ef6\u521b\u5efa\u65f6\u95f4<\/p>\n\n\n\n
\u6ce8\u610f\uff1a\u65b0\u65e7\u6bd4\u8f83\u5fc5\u987b\u5b9e\u7528\u7279\u5b9a\u7684\u5b57\u7b26\uff0c\u4e0d\u80fd\u76f4\u63a5\u4f7f\u7528\u5927\u4e8e\u53f7\u6216\u5c0f\u4e8e\u53f7<\/p>\n\n\n\n
file1 -nt  file2        \u6bd4\u8f83file1\u662f\u5426\u6bd4file2\u65b0        \nfile1 -ot  file2         \u6bd4\u8f83file1\u662f\u5426\u6bd4file2\u65e7\nfile1 -ef  file2        \u6bd4\u8f83\u662f\u5426\u4e3a\u540c\u4e00\u4e2a\u6587\u4ef6\uff0c\u6216\u8005\u7528\u4e8e\u5224\u65ad\u786c\u8fde\u63a5\uff0c\u662f\u5426\u6307\u5411\u540c\u4e00\u4e2ainode\n\n-nt\uff1anew than\n-ot\uff1aold than\n-ef\uff1aequal file<\/code><\/pre>\n\n\n\n
\u6848\u4f8b\u6f14\u793a\uff1a<\/p>\n\n\n\n
test file1 -nt file2        \n[ file1 -ot file2 ]<\/code><\/pre>\n\n\n\n
\u5c0f\u7ed3\uff1a<\/p>\n\n\n\n
\u901a\u8fc7\u65b0\u65e7\u6bd4\u8f83\uff0c\u4e86\u89e3\u4e24\u4e2a\u6587\u4ef6\u7684\u521b\u5efa\u4fe1\u606f<\/p>\n\n\n\n
5.<\/strong> \u5927\u5c0f\u6bd4\u8f83\u7b26\u53f7\uff08\u91cd\u70b9\uff09<\/h2>\n\n\n\n
\u8bf4\u660e\uff1a\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cShell\u811a\u672c\u4e2d\uff0c\u4e00\u822c\u4e0d\u80fd\u76f4\u63a5\u4f7f\u7528\u5982>\u3001<\u3001>=\u3001<=\u3001=\u7b49\u4e8e\u7b49\u7b26\u53f7\u7684\uff0c\u4e3a\u4e86\u89e3\u51b3\u4ee5\u4e0a\u95ee\u9898\uff0c\u5f15\u5165\u4e86\u4e00\u7ec4\u7b26\u53f7\uff1a<\/p>\n\n\n\n
\u5728 Shell \u4e2d\uff0c-eq<\/code>\u3001-ne<\/code>\u3001-gt<\/code>\u3001-lt<\/code>\u3001-ge<\/code> \u548c -le<\/code> \u7528\u4e8e\u6570\u503c\u6bd4\u8f83\u3002\u5b83\u4eec\u5e38\u7528\u4e8e\u6d4b\u8bd5\u4e24\u4e2a\u6570\u5b57\u662f\u5426\u76f8\u7b49\u3001\u4e0d\u7b49\u3001\u5927\u5c0f\u5173\u7cfb\u7b49\u3002\u4e0b\u9762\u662f\u8fd9\u4e9b\u64cd\u4f5c\u7b26\u7684\u8be6\u7ec6\u89e3\u91ca\u548c\u4e00\u4e9b\u5b9e\u9645\u6848\u4f8b\u3002<\/p>\n\n\n\n
-eq        (equal)\u76f8\u7b49-ne        (not euqal)\u4e0d\u7b49-gt        (greater than)\u5927\u4e8e-lt        (litter than)\u5c0f\u4e8e-ge        (greater equal)\u5927\u4e8e\u7b49\u4e8e-le        (litter equal)\u5c0f\u4e8e\u7b49\u4e8e<\/code><\/pre>\n\n\n\n
\u6848\u4f8b\uff1a<\/p>\n\n\n\n
a=5\nb=5\ntest $a -eq $b<\/code><\/pre>\n\n\n\n
\u6848\u4f8b\uff1a<\/p>\n\n\n\n
a=8\nb=7\ntest $a -ge $b<\/code><\/pre>\n\n\n\n
\u5c0f\u7ed3\uff1a<\/p>\n\n\n\n
\u7531\u4e8e\u5728Shell\u811a\u672c\u4e2d\uff0c\u5f88\u591a\u6570\u5b66\u7b26\u53f7\u90fd\u6709\u7279\u6b8a\u542b\u4e49\uff0c\u5982\u679c\u8981\u8fdb\u884c\u65e5\u5e38\u6bd4\u8f83\uff0c\u53ea\u80fd\u4f7f\u7528\u5b57\u6bcd\u5f62\u5f0f\u7684\u6bd4\u8f83\u7b26\u53f7\uff01<\/p>\n\n\n\n
6.<\/strong> \u5b57\u7b26\u4e32\u4e4b\u95f4\u7684\u5224\u65ad\uff08\u91cd\u70b9\uff09<\/h2>\n\n\n\n
-z                                                                                     (zero)\u662f\u5426\u4e3a\u7a7a\u5b57\u7b26\u4e32              \u5b57\u7b26\u4e32\u957f\u5ea6\u4e3a0\uff0c\u5c31\u6210\u7acb\n-n                                                                                   (not zero)\u662f\u5426\u4e3a\u975e\u7a7a\u5b57\u7b26\u4e32        \u53ea\u8981\u5b57\u7b26\u4e32\u975e\u7a7a\uff0c\u5c31\u662f\u6210\u7acb\n\nstring1 = string2                           \u662f\u5426\u76f8\u7b49\nstring1 != string2                       \u4e0d\u7b49<\/code><\/pre>\n\n\n\n
\u6848\u4f8b\u6f14\u793a\uff1a<\/p>\n\n\n\n
[root@itheima ~]# AAA=hello\n[root@itheima ~]# BBB=world\n[root@itheima ~]# test -z $AAA\n[root@itheima ~]# echo $?\n1\n\n[root@itheima ~]# test -n $AAA\n[root@itheima ~]# echo $?\n0\n\n[root@itheima ~]# [ $AAA = $BBB ]\n[root@itheima ~]# echo $?\n1\n\n[root@itheima ~]# [ $AAA != $BBB ]\n[root@itheima ~]# echo $?\n0<\/code><\/pre>\n\n\n\n
\u5c0f\u7ed3\uff1a<\/p>\n\n\n\n
-z\u3001-n\u3001=\u3001!=\uff0c\u4e3b\u8981\u7528\u4e8e\u5b57\u7b26\u4e32\u5224\u65ad\u64cd\u4f5c<\/p>\n\n\n\n
\u7591\u95ee\uff1a-eq \u4e0e = \u6709\u4f55\u533a\u522b\uff1f<\/p>\n\n\n\n
\u7b54\uff1a\u5982\u679c\u662f\u6570\u5b57\u6bd4\u8f83\uff0c\u53ea\u80fd\u4f7f\u7528-eq\uff1b\u5982\u679c\u662f\u5b57\u7b26\u4e32\u6bd4\u8f83\uff0c\u53ef\u4ee5\u4f7f\u7528=\u8fdb\u884c\u6bd4\u8f83<\/p>\n\n\n\n
7.<\/strong> \u903b\u8f91\u5224\u65ad\u7b26\u53f7\uff08\u91cd\u70b9\uff09<\/h2>\n\n\n\n
\u903b\u8f91\u5224\u65ad\u7b26\u53f7\uff1a\u903b\u8f91\u4e0e\u3001\u903b\u8f91\u6216\u7b26\u53f7<\/p>\n\n\n\n
\u903b\u8f91\u4e0e\uff1a-a \u6216 &&\uff0cand\u7f29\u5199<\/p>\n\n\n\n
\u903b\u8f91\u6216\uff1a-o \u6216 ||\uff0cor\u7f29\u5199<\/p>\n\n\n\n
\u903b\u8f91\u5224\u65ad\u7b26\u53f7\uff1a<\/p>\n\n\n\n
[ \u8868\u8fbe\u5f0f1 -a \u8868\u8fbe\u5f0f2 ]\uff0c\u4e24\u4e2a\u6761\u4ef6\u540c\u65f6\u6ee1\u8db3\uff0c\u6574\u4e2a\u5927\u6761\u4ef6\u4e3a\u771f<\/p>\n\n\n\n
[ \u8868\u8fbe\u5f0f1 ] && [ \u8868\u8fbe\u5f0f2 ]\uff0c\u4e24\u4e2a\u6761\u4ef6\u540c\u65f6\u6ee1\u8db3\uff0c\u6574\u4e2a\u5927\u6761\u4ef6\u4e3a\u771f<\/p>\n\n\n\n
\u6545\u4e8b\uff1a\u5973\u5b69\u5b50\uff0c\u81ea\u8eab\u6761\u4ef6\u6bd4\u8f83\u597d\uff0c\u8981\u6c42\u7537\u65b9\u5fc5\u987b\u8981\u6709\u8f66 \u4e14 \u6709\u623f\uff0c\u7275\u624b\u6210\u529f<\/p>\n\n\n\n
[ \u6709\u8f66 -a \u6709\u623f ]<\/p>\n\n\n\n
[ \u8868\u8fbe\u5f0f1 -o \u8868\u8fbe\u5f0f2 ]\uff0c\u4e24\u4e2a\u6761\u4ef6\u6ee1\u8db3\u4efb\u610f\u4e00\u4e2a\uff0c\u6574\u4e2a\u5927\u6761\u4ef6\u4e3a\u771f<\/p>\n\n\n\n
[ \u8868\u8fbe\u5f0f1 ] || [ \u8868\u8fbe\u5f0f2 ]\uff0c\u4e24\u4e2a\u6761\u4ef6\u6ee1\u8db3\u4efb\u610f\u4e00\u4e2a\uff0c\u6574\u4e2a\u5927\u6761\u4ef6\u4e3a\u771f<\/p>\n\n\n\n
\u6545\u4e8b\uff1a\u5973\u5b69\u5b50\uff0c\u81ea\u8eab\u6761\u4ef6\u4e00\u822c\uff0c\u8981\u6c42\u7537\u65b9\u5fc5\u987b\u8981\u6709\u8f66 \u6216 \u6709\u623f\uff0c\u7275\u624b\u6210\u529f<\/p>\n\n\n\n
[ \u6709\u8f66 -o \u6709\u623f ]<\/p>\n\n\n\n
 -a  \u548c &&  (and \u903b\u8f91\u4e0e)                 \u4e24\u4e2a\u6761\u4ef6\u540c\u65f6\u6ee1\u8db3\uff0c\u6574\u4e2a\u5927\u6761\u4ef6\u4e3a\u771f\n -o  \u548c  ||           (or \u903b\u8f91\u6216)                          \u4e24\u4e2a\u6761\u4ef6\u6ee1\u8db3\u4efb\u610f\u4e00\u4e2a\uff0c\u6574\u4e2a\u5927\u6761\u4ef6\u4e3a\u771f<\/code><\/pre>\n\n\n\n
\u751f\u4ea7\u5e94\u7528\uff1a\u4ee3\u66ffif...else\u8bed\u53e5\uff08\u4e8c\u9009\u4e00\u7ed3\u6784\uff0cif\u540e\u9762\u8ddf\u6761\u4ef6\uff0c\u5982\u679c\u6761\u4ef6\u662f\u771f\u7684 \uff0c\u5c31\u6267\u884cif\u4ee3\u7801\uff0c\u53cd\u4e4b\u5c31\u6267\u884celse\u4ee3\u7801\uff09<\/p>\n\n\n\n
age=19\nif [ $age -ge 18 ]; then\n     \u5982\u679c\u6761\u4ef6\u6210\u7acb\uff0c\u5c31\u6267\u884c\u4e0b\u65b9\u4ee3\u7801\n     echo "\u5df2\u6210\u5e74\uff0c\u53ef\u4ee5\u4e0a\u7f51"\nelse\n      \u5982\u679c\u6761\u4ef6\u4e0d\u6210\u7acb\uff0c\u5c31\u6267\u884celse\u4e0b\u65b9\u4ee3\u7801\n      echo "\u672a\u6210\u5e74\uff0c\u4e0d\u53ef\u4ee5\u4e0a\u7f51"\nfi<\/code><\/pre>\n\n\n\n
\u7b80\u5316<\/p>\n\n\n\n
\u6761\u4ef6\u8868\u8fbe\u5f0f && \u5982\u679c\u6761\u4ef6\u6210\u7acb\uff0c\u6267\u884c\u6b64\u5185\u5bb9 || \u5982\u679c\u6761\u4ef6\u4e0d\u6210\u7acb\uff0c\u6267\u884c\u6b64\u5185\u5bb9\nage=19\n[ $age -ge 18 ] && echo "\u5df2\u6210\u5e74\uff0c\u53ef\u4ee5\u4e0a\u7f51" || echo "\u672a\u6210\u5e74\uff0c\u4e0d\u53ef\u4ee5\u4e0a\u7f51"\n\n\n\u6267\u884c\u539f\u7406\uff1a\n\u7b2c\u4e00\u6b65\uff1a\u628a\u6761\u4ef6\u8868\u8fbe\u5f0f && \u5982\u679c\u6761\u4ef6\u6210\u7acb\uff0c\u6267\u884c\u6b64\u5185\u5bb9\u5f53\u505a\u4e00\u4e2a\u6574\u4f53\uff0c\u5148\u5224\u65ad\n\u5982 [ 1 -eq 2 ] && echo true\uff0c\u5982\u679c\u5de6\u8fb9\u662f\u771f\u7684\uff0c\u5fc5\u987b\u8981\u5224\u65ad\u53f3\u8fb9\uff08\u6267\u884c\u53f3\u8fb9\uff09\uff0c\u56e0\u4e3a\u4e2d\u95f4&&\uff0c\u5fc5\u987b\u4e24\u8fb9\u540c\u65f6\u4e3a\u771f\uff0c\u540c\u65f6\u6267\u884c\uff1b\u5982\u679c\u5de6\u8fb9\u662f\u5047\u7684\uff0c\u5219\u53f3\u8fb9\u5b8c\u5168\u4e0d\u9700\u8981\u6267\u884c\u4e86\uff0c\u56e0\u4e3a\u903b\u8f91\u4e0e\uff0c\u5fc5\u987b\u4e24\u8fb9\u540c\u65f6\u6210\u7acb\uff0c\u53ea\u8981\u6709\u4e00\u8fb9\u4e3a\u5047\uff0c\u6700\u7ec8\u7ed3\u679c\u80af\u5b9a\u662f\u5047\u7684\u3002\n\n\u7b2c\u4e8c\u6b65\uff1a\u628a\u7b2c\u4e00\u6b65\u5f97\u5230\u7684\u7ed3\u679c \u4e0e \u540e\u9762\u7684\u6761\u4ef6\u7ec4\u5408\ntrue || echo false\uff0c\u7531\u4e8e\u5de6\u8fb9\u662f\u771f\u7684\uff0c\u4e2d\u95f4\u903b\u8f91\u7b26\u53f7\u662f||\uff0c\u5219\u53f3\u8fb9\u80af\u5b9a\u4e0d\u4f1a\u6267\u884c\nfalse || echo false\uff0c\u7531\u4e8e\u5de6\u8fb9\u662f\u5047\u7684\uff0c\u4e2d\u95f4\u903b\u8f91\u7b26\u53f7\u662f||\uff0c\u8981\u60f3\u83b7\u53d6\u6700\u7ec8\u7ed3\u679c\u5fc5\u987b\u6267\u884c\u53f3\u8fb9\u8868\u8fbe\u5f0f\uff0c\u624d\u80fd\u83b7\u53d6\u6700\u7ec8\u7ed3\u679c<\/code><\/pre>\n\n\n\n
\u6848\u4f8b\u6f14\u793a\uff1a<\/p>\n\n\n\n
[ 1 -eq 1 -a 1 -ne 0 ]                                \u6574\u4e2a\u8868\u8fbe\u5f0f\u4e3a\u771f\n[ 1 -eq 1 ] && [ 1 -ne 0 ]                        \n\n[ 1 -eq 1 -o 1 -ne 1 ]                                \u6574\u4e2a\u8868\u8fbe\u5f0f\u4e3a\u771f\n[ 1 -eq 1 ] || [ 1 -ne 1 ]\n\n[root@itheima ~]# [ 1 -eq 0 ] && echo true || echo false\nfalse\n\n[root@ itheima ~]# [ 1 -eq 1 ] && echo true || echo false\ntrue\n\n&&:\u524d\u9762\u7684\u8868\u8fbe\u5f0f\u4e3a\u771f\n||\uff1a\u524d\u9762\u7684\u8868\u8fbe\u5f0f\u4e3a\u5047<\/code><\/pre>\n\n\n\n
\u5c0f\u7ed3\uff1a<\/p>\n\n\n\n
-a \u6216 &&\uff1a\u903b\u8f91\u4e0e\uff0c\u4e24\u4e2a\u6761\u4ef6\u540c\u65f6\u6ee1\u8db3\uff0c\u6574\u4e2a\u5927\u6761\u4ef6\u4e3a\u771f<\/p>\n\n\n\n
-o \u6216 || \uff1a\u903b\u8f91\u6216\uff0c\u4e24\u4e2a\u6761\u4ef6\u6ee1\u8db3\u4efb\u610f\u4e00\u4e2a\uff0c\u6574\u4e2a\u5927\u6761\u4ef6\u4e3a\u771f<\/p>\n\n\n\n
\u6761\u4ef6\u8868\u8fbe\u5f0f && \u6761\u4ef6\u4e3a\u771f\u6267\u884c\u6b64\u8bed\u53e5 || \u6761\u4ef6\u4e3a\u5047\u5219\u6267\u884c\u6b64\u8bed\u53e5<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5224\u65ad\u8bed\u53e5\uff1a\u89e3\u51b3\u4e1a\u52a1\u903b\u8f91\u4e2d\u7684\u5224\u65ad\u95ee\u9898 1. \u57fa\u672c\u8bed\u6cd5 2. \u6587\u4ef6\u5b58\u5728\u4e0e\u5426\u5224\u65ad\uff08\u91cd\u70b9\uff09 \u9762\u8bd5\uff1a\u4f60\u719f\u6089Shell\u811a\u672c […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26,29],"tags":[],"class_list":["post-192","post","type-post","status-publish","format-standard","hentry","category-devops","category-shell"],"_links":{"self":[{"href":"https:\/\/www.xxiaoteng.cn\/index.php?rest_route=\/wp\/v2\/posts\/192","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xxiaoteng.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xxiaoteng.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xxiaoteng.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xxiaoteng.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=192"}],"version-history":[{"count":1,"href":"https:\/\/www.xxiaoteng.cn\/index.php?rest_route=\/wp\/v2\/posts\/192\/revisions"}],"predecessor-version":[{"id":193,"href":"https:\/\/www.xxiaoteng.cn\/index.php?rest_route=\/wp\/v2\/posts\/192\/revisions\/193"}],"wp:attachment":[{"href":"https:\/\/www.xxiaoteng.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=192"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xxiaoteng.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=192"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xxiaoteng.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=192"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}