{"id":59277,"date":"2026-01-13T16:14:08","date_gmt":"2026-01-13T08:14:08","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/59277.html"},"modified":"2026-01-13T16:14:08","modified_gmt":"2026-01-13T08:14:08","slug":"shell%e6%95%99%e7%a8%8b%e4%b9%8bshell%e5%ad%97%e7%ac%a6%e4%b8%b2","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/59277.html","title":{"rendered":"Shell\u6559\u7a0b\u4e4bShell\u5b57\u7b26\u4e32"},"content":{"rendered":"<p>Shell \u5b57\u7b26\u4e32\u00a0<\/p>\n<p>\u5b57\u7b26\u4e32\u662fshell\u7f16\u7a0b\u4e2d\u6700\u5e38\u7528\u6700\u6709\u7528\u7684\u6570\u636e\u7c7b\u578b&#xff08;\u9664\u4e86\u6570\u5b57\u548c\u5b57\u7b26\u4e32&#xff0c;\u4e5f\u6ca1\u5565\u5176\u5b83\u7c7b\u578b\u597d\u7528\u4e86&#xff09;&#xff0c;\u5b57\u7b26\u4e32\u53ef\u4ee5\u7528\u5355\u5f15\u53f7&#xff0c;\u4e5f\u53ef\u4ee5\u7528\u53cc\u5f15\u53f7&#xff0c;\u4e5f\u53ef\u4ee5\u4e0d\u7528\u5f15\u53f7\u3002\u00a0<\/p>\n<p>\u5355\u5f15\u53f7\u00a0<\/p>\n<p>str&#061;&#039;this is a string&#039; \u5355\u5f15\u53f7\u5b57\u7b26\u4e32\u7684\u9650\u5236&#xff1a;<\/p>\n<p>\u00a0\u2022 \u5355\u5f15\u53f7\u91cc\u7684\u4efb\u4f55\u5b57\u7b26\u90fd\u4f1a\u539f\u6837\u8f93\u51fa&#xff0c;\u5355\u5f15\u53f7\u5b57\u7b26\u4e32\u4e2d\u7684\u53d8\u91cf\u662f\u65e0\u6548\u7684&#xff1b;\u00a0<\/p>\n<p>\u2022 \u5355\u5f15\u53f7\u5b57\u4e32\u4e2d\u4e0d\u80fd\u51fa\u73b0\u5355\u72ec\u4e00\u4e2a\u7684\u5355\u5f15\u53f7&#xff08;\u5bf9\u5355\u5f15\u53f7\u4f7f\u7528\u8f6c\u4e49\u7b26\u540e\u4e5f\u4e0d\u884c&#xff09;&#xff0c;\u4f46\u53ef\u6210\u5bf9\u51fa\u73b0&#xff0c;\u4f5c\u4e3a\u5b57\u7b26\u4e32\u62fc\u63a5\u4f7f\u7528\u3002<\/p>\n<\/p>\n<p>\u53cc\u5f15\u53f7<\/p>\n<p>\u00a0your_name&#061;&#039;runoob&#039;\u00a0<\/p>\n<p>str&#061;&#034;Hello, I know you are\u00a0<\/p>\n<p>\\\\&#034;$your_name\\\\&#034;! \\\\n&#034; echo -e $str\u00a0<\/p>\n<p>\u8f93\u51fa\u7ed3\u679c\u4e3a&#xff1a;\u00a0<\/p>\n<p>Hello, I know you are 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!<\/p>\n<\/p>\n<p>\u83b7\u53d6\u5b57\u7b26\u4e32\u957f\u5ea6\u00a0<\/p>\n<p>string&#061;&#034;abcd&#034; echo ${#string}\u00a0<\/p>\n<p>#\u8f93\u51fa 4 \u63d0\u53d6\u5b50\u5b57\u7b26\u4e32<\/p>\n<p>\u00a0\u4ee5\u4e0b\u5b9e\u4f8b\u4ece\u5b57\u7b26\u4e32\u7b2c 2 \u4e2a\u5b57\u7b26\u5f00\u59cb\u622a\u53d6 4 \u4e2a\u5b57\u7b26&#xff1a;<\/p>\n<p>string&#061;&#034;runoob is a great site&#034;<\/p>\n<p>echo ${string:1:4} # \u8f93\u51fa unoo\u00a0<\/p>\n<p>\u6ce8\u610f&#xff1a;\u7b2c\u4e00\u4e2a\u5b57\u7b26\u7684\u7d22\u5f15\u503c\u4e3a 0\u3002<\/p>\n<\/p>\n<p>\u67e5\u627e\u5b50\u5b57\u7b26\u4e32\u00a0<\/p>\n<p>\u67e5\u627e\u5b57\u7b26 i \u6216 o \u7684\u4f4d\u7f6e(\u54ea\u4e2a\u5b57\u6bcd\u5148\u51fa\u73b0\u5c31\u8ba1\u7b97\u54ea\u4e2a)&#xff1a;<\/p>\n<p>string&#061;&#034;runoob is a\u00a0<\/p>\n<p>great site&#034; echo &#096;expr index &#034;$string&#034; io&#096; # \u8f93\u51fa 4<\/p>\n<p>\u6ce8\u610f&#xff1a;\u4ee5\u4e0a\u811a\u672c\u4e2d &#096; 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