以下是关于“列出所有Bash Shell内置命令的方法示例”的完整攻略,其中包含两个示例说明。
1. 前言
Bash Shell是Linux系统中最常用的Shell之一,它提供了许多内置命令,这些命令可以帮助我们完成各种任务。本攻略将详细介绍如何列出所有Bash Shell内置命令的方法。
2. 列出所有Bash Shell内置命令的方法
2.1 使用compgen命令
compgen命令可以列出所有Bash Shell内置命令,它的用法如下:
compgen -b
在本示例中,我们使用compgen命令列出所有Bash Shell内置命令,并使用-b
选项过滤出只显示内置命令。
2.2 使用help命令
help命令可以列出所有Bash Shell内置命令的帮助信息,它的用法如下:
help -d
在本示例中,我们使用help命令列出所有Bash Shell内置命令的帮助信息,并使用-d
选项只显示内置命令的帮助信息。
3. 示例说明
以下是两个示例说明,帮助你更好地了解如何列出所有Bash Shell内置命令。
示例一:使用compgen命令列出所有Bash Shell内置命令
compgen -b
在本示例中,我们使用compgen命令列出所有Bash Shell内置命令,并使用-b
选项过滤出只显示内置命令。输出结果如下:
. :
[ alias bg bind break builtin caller cd command compgen complete compopt continue declare dirs disown echo enable eval exec exit export false fc fg getopts hash help history jobs kill let local logout mapfile popd printf pushd pwd read readonly return set shift shopt source suspend test times trap true type typeset ulimit umask unalias unset wait
示例二:使用help命令列出所有Bash Shell内置命令的帮助信息
help -d
在本示例中,我们使用help命令列出所有Bash Shell内置命令的帮助信息,并使用-d
选项只显示内置命令的帮助信息。输出结果如下:
. : .
: :
[ : [
alias : alias [-p] [name[=value] ... ]
bg : bg [job_spec ...]
bind : bind [-lpsvPSVX] [-m keymap] [-f filename] [-q name] [-u name] [-r keyseq] [-x keyseq:shell-command] [keyseq:readline-function or readline-command]
break : break [n]
builtin : builtin [-s] [-v] [-n] [-f filename] [shell-builtin [arg ...]]
caller : caller [expr]
cd : cd [-L|[-P [-e]] [-@]] [dir]
command : command [-pVv] command [arg ...]
compgen : compgen [-abcdefgjksuv] [-o option] [-A action] [-G globpat] [-W wordlist] [-F function] [-C command] [-X filterpat] [-P prefix] [-S suffix] [word]
complete : complete [-abcdefgjksuv] [-pr] [-DE] [-o option] [-A action] [-G globpat] [-W wordlist] [-P prefix] [-S suffix] [-X filterpat] [-F function] [-C command] [name ...]
compopt : compopt [-o|+o option] [-DE] [name ...]
continue : continue [n]
declare : declare [-aAfFgilnrtux] [-p] [name[=value] ...]
dirs : dirs [-clpv] [+N] [-N]
disown : disown [-h] [-ar] [jobspec ...]
echo : echo [-neE] [arg ...]
enable : enable [-a] [-dnps] [-f filename] [name ...]
eval : eval [arg ...]
exec : exec [-cl] [-a name] [command [arguments ...]] [redirection ...]
exit : exit [n]
export : export [-fn] [name[=value] ...] or export -p
false : false
fc : fc [-e ename] [-lnr] [first] [last] or fc -s [pat=rep] [command]
fg : fg [job_spec]
getopts : getopts optstring name [arg]
hash : hash [-lr] [-p pathname] [-dt] [name ...]
help : help [-dms] [pattern ...]
history : history [-c] [-d offset] [n] or history -anrw [filename] or history -ps arg [arg...]
jobs : jobs [-lnprs] [jobspec ...] or jobs -x command [args]
kill : kill [-s sigspec | -n signum | -sigspec] pid | jobspec ... or kill -l [sigspec]
let : let arg [arg ...]
local : local [option] name[=value] ...
logout : logout [n]
mapfile : mapfile [-n count] [-O origin] [-s count] [-t] [-u fd] [-C callback] [-c quantum] [array]
popd : popd [-n] [+N | -N]
printf : printf [-v var] format [arguments]
pushd : pushd [-n] [-q] [+N | -N | dir]
pwd : pwd [-LP]
read : read [-ers] [-a array] [-d delim] [-i text] [-n nchars] [-N nchars] [-p prompt] [-t timeout] [-u fd] [name ...]
readonly : readonly [-aAf] [name[=value] ...] or readonly -p
return : return [n]
set : set [-abefhkmnptuvxBCHP] [-o option-name] [--] [arg ...]
shift : shift [n]
shopt : shopt [-pqsu] [-o] [optname ...]
source : . filename [arguments]
suspend : suspend [-f]
test : test [expr]
times : times
trap : trap [-lp] [[arg] signal_spec ...]
true : true
type : type [-afptP] name [name ...]
typeset : typeset [-aAfFilrtux] [-p] name[=value] ...
ulimit : ulimit [-SHabcdefilmnpqrstuvx] [limit]
umask : umask [-p] [-S] [mode]
unalias : unalias [-a] name [name ...]
unset : unset [-f] [-v] [-n] [name ...]
wait : wait [-n] [id ...]
4. 总结
本攻略详细介绍了如何列出所有Bash Shell内置命令的方法,包括使用compgen命令和help命令。通过学习本攻略,可以更好地掌握Bash Shell的使用和管理。同时,我们还提供了两个示例说明,帮助你更好地了解如何列出所有Bash Shell内置命令。
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