$path
–
Search Path for Commands
$path defines where the shell searches for commands.
Entries are searched left to right.
When you invoke a command just by name, e.g. man instead of /usr/bin/man, then the executable file is searched in $path.
$PATH is a POSIX variable and contains the same data as a colon-separated value.
Links
BashSupport Pro 是一款支持 path** 的 **Zsh 集成开发环境 - 立即试用！