BASH BUILTIN COMMANDS 内建命令 除非另外说明,这一章介绍的内建命令如果接受-引导的选项,那么它也接受--作为参数,来指示选项的结束 :[arguments] 没有效果;这个命令除了扩展arguments并且作任何指定的重定向之外,不做任何事。退出时返回0。 .filename[arguments] sourcefilename[arguments] 读取并在当前 shell 环境...
BASH BUILTIN COMMANDS 内建命令 除非另外说明,这一章介绍的内建命令如果接受-引导的选项,那么它也接受--作为参数,来指示选项的结束 :[arguments] 没有效果;这个命令除了扩展arguments并且作任何指定的重定向之外,不做任何事。退出时返回0。 .filename[arguments] sourcefilename[arguments] 读取并在当前 shell 环境...
执行man type,有一段就告诉你内置命令都有啥了 BASH BUILTIN COMMANDS Unless otherwise noted, each builtin command documented in this section as accepting options preceded by - accepts -- to signify the end of the options. The :, true, false, and test builtins do not accept options and do ...
内置命令bash built-in commands 很多种 第一种:bash自身带的功能 参见man cd NAME bash, :, ., [, alias, bg, bind, break, builtin, cd, command, compgen, complete, continue, declare, dirs, disown, echo, enable, eval, exec, exit, export, fc, fg, getopts, hash, help, history, jobs, ...
内置命令bash built-in commands 很多种 第一种:bash自身带的功能 参见man cd NAME bash, :, ., [, alias, bg, bind, break, builtin, cd, command, compgen, complete, continue, declare, dirs, disown, echo, enable, eval, exec, exit, export, fc, fg, ...
shell> built-inCommands这样执行时,大部分内部命令也是在subshell中执行。 可见,UNIX at Fermilab认为fork 一个child shell就是subshell, 不管是fork-fork+exec, 还是 fork+exec。 我刚才又去翻了下ABS,定义与我的理解不一样 QUOTE: A subshell is a separate instance of the command processor -- the shell...
Bash has several commands that comes with the shell (i.e built inside the bash shell). When you execute a built-in command, bash shell executes it immediately, without invoking any other program. Bash shell built-in commands are faster than external commands, because external commands usually ...
Fun fact, type is a shell builtin as well. Type type type and hit enter and see more details. help - Lists some shell builtin commands by default. help - Gives more information about info - This is kind of the man page for shell builtins. Its CLI, of course, but it's hyperl...
Bash let builtin command help and information with let examples, syntax, related commands, and how to use the let command from the command line.
shopt_option 是一个 shopt 内建命令可接受的选项 (参见下面的 shell 内建命令(SHELL BUILTIN COMMANDS) 章节)。 如果有 shopt_option,-O 将设置那个选项的取值; +O 取消它。 如果没有给出 shopt_option,shopt 将在标准输出上打印设为允许的选项的名称和值。 如果启动选项是 +O,输出将以一种可以重用为输入...