1. which(1)
3. which(1)

NAME

which - 显示shell命令的完整路径

综述

which [options] [−−] programname...

描述

which命令的作用是在当前用户环境变量PATH指定的路径中搜索一个或多个系统命 令的位置并为每个命令返回第一个搜索结果.

选项

--all, -a

打印所有匹配该命令的路径.

--read-alias, -i

Read aliases from stdin, reporting matching ones on stdout.

--skip-alias

Ignore option --read-alias´, if any. This is useful to explicity search for normal binaries, while using the --read-alias´ option in an alias or function for which.

--read-functions

Read shell function definitions from stdin, reporting matching ones on stdout.

--skip-functions

Ignore option `--read-functions´, if any.

--skip-dot

Skip directories in PATH that start with a dot.

--skip-tilde

Skip directories in PATH that start with a tilde and executables which reside in the HOME directory.

--show-dot

If a directory in PATH starts with a dot and a matching executable was found for that path, then print "./programname" rather than the full path.

--show-tilde

Output a tilde when a directory matches the HOME directory. This option is ignored when which is invoked as root.

--tty-only

Stop processing options on the right if not on tty.

--version,-v,-V

Print version information on standard output then exit successfully.

--help

Print usage information on standard output then exit successfully.

2. March 2015
3. which(1)