Here Document 说明 Here Document也被称为here-document/here-text/heredoc/hereis/here-string/here-script,在Linux/Unix中的shell中被广泛地应用,尤其在于用于传入多行分割参数给执行命令。 除了shell(包含sh/csh/tcsh/ksh/bash/zsh等),这种方式的功能也影响和很多其他语言诸如Perl,PHP以及Ruby等。 这个也被称为...
Any part of the pattern may be quoted to force it to be matched as a string. Substrings matched by parenthesized subexpressions within the regular expression are saved in the array variable BASH_REMATCH. The element of BASH_REMATCH with index 0 is the portion of the string matching the ...
The string to the right of the operator is considered a POSIX extended regular expression and matched accordingly. Be careful, this will not look for an exact match as it uses a shell regex. [me@linux ~]$ myArray=(a b c d) [me@linux ~]$ [[ ${myArray[*]} =~ 'a' ]] && ...
Normally, less will highlight ALL strings which match the last search command. The -g option changes this behavior to highlight only the particular string which was found by the last search command. This can cause less to run somewhat faster than the default. -G or --HILITE-SEARCH The -G...
BASH_REMATCH with index n is the portion of the string matching the nth parenthesized sub‐ expression. Expressions may be combined using the following operators, listed in decreasing order of precedence: ( expression ) Returns the value of expression. This may be used to override the normal ...
!n 执行第n个命令!!执行上一个命令!STRING 执行最近一次以STRING开头的命令## 执行历史命令# !! 运行上一条命令# !88 运行第88条命令# !ca 运行上一个包含ca的命令## 搜索历史命令使用ctrl+r搜索历史中的字符串,重复按ctrl+r可以在历史命令列表中不断的向前搜索包含字符串的命令,回车就会执行查找的命令 ...
test: Match Python's default locale unaware sort in bash setup (c46536a) test: Refactor/improve completion results checking (0d9d375) __parse_options: Avoid non-zero exit status (5ecb9d7) test: Convert remaining _parse_help unit test to pytest+pexpect (a2c9da2) ifstat: New completion ...
The return value is 0 if the string matches the pattern, and 1 otherwise. If the regular expression is syntactically incorrect, the conditional expression's return value is 2. If the shell option nocasematch is enabled, the match is performed without regard to the case of alphabetic ...
When playing media from the command line it is possible to specify a substring with which a partial match can be made. In order to play media, either the full name of the desired media or enough of a substring to uniquely match should be supplied. This applies to playing an album, artis...
BASH_BUILTINS(1) General Commands Manual BASH_BUILTINS(1)23NAME4:, ., [, alias, bg, bind, break, builtin, caller, cd, command, compgen, complete, compopt, continue, declare, dirs, disown,echo,5enable, eval, exec, exit, export,false, fc, fg, getopts, hash, help, history, jobs,...