#Bash 的 true 命令

true OPTION

功能

什么也不做，直接返回成功（0），通常用于 if 语句。

类型

Bash 内置命令。

true 也是 coreutils 的一个可执行文件；为了保持 POSIX 标准的兼容性，确保在其他 shell（比如一些极简的或古老的 shell）或者某些特定环境下，命令依然可用。

参数

OPTION 选项：
- --help - 显示帮助
- --version - 显示版本

#示例

if [ true ]; then
    echo 吃饭
else
    echo 睡觉
fi

>>> Establishing WebAssembly Runtime.

>>> Standby.

#相关命令

命令	说明
false	直接返回失败
test	评估表达式的布尔值

#推荐阅读

true(1) — Linux manual page

#手册

TRUE(1)                          User Commands                         TRUE(1)

NAME
       true - do nothing, successfully

SYNOPSIS
       true [ignored command line arguments]
       true OPTION

DESCRIPTION
       Exit with a status code indicating success.

       --help display this help and exit

       --version
              output version information and exit

       NOTE: your shell may have its own version of true, which usually super‐
       sedes  the  version described here.  Please refer to your shell's docu‐
       mentation for details about the options it supports.

AUTHOR
       Written by Jim Meyering.

REPORTING BUGS
       GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
       Report any translation bugs to <https://translationproject.org/team/>

COPYRIGHT
       Copyright © 2023 Free Software Foundation, Inc.   License  GPLv3+:  GNU
       GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
       This  is  free  software:  you  are free to change and redistribute it.
       There is NO WARRANTY, to the extent permitted by law.

SEE ALSO
       Full documentation <https://www.gnu.org/software/coreutils/true>
       or available locally via: info '(coreutils) true invocation'

GNU coreutils 9.4                 April 2024                           TRUE(1)

#Bash 的 true 命令

#示例

#相关命令

#推荐阅读

#手册

显示