每日一个linux命令15-which

1. 命令解析

命令用途：

显示命令的全部路径到标准输出。

命令格式：

which [options] [--] COMMAND [...]

命令参数：

--version, -[vV] Print version and exit successfully.
--help, Print this help and exit successfully.
--skip-dot Skip directories in PATH that start with a dot.
--skip-tilde Skip directories in PATH that start with a tilde.
--show-dot Don't expand a dot to current directory in output.
--show-tilde Output a tilde for HOME directory for non-root.
--tty-only Stop processing options on the right if not on tty.
--all, -a Print all matches in PATH, not just the first
--read-alias, -i Read list of aliases from stdin.
--skip-alias Ignore option --read-alias; don't read stdin.
--read-functions Read shell functions from stdin.
--skip-functions Ignore option --read-functions; don't read stdin.

2. 示例

2.1 显示ls命令的路径

[root@test headTest]# which ls
alias ls='ls --color=auto'
    /usr/bin/ls