param

来自「shell是重要的脚本语言和工具 本文件夹中搜集了比较经典的shell入门的代」· 代码 · 共 18 行

#!/bin/sh

unset foo
echo ${foo:-bar} 

foo=fud
echo ${foo:-bar}

foo=/usr/bin/X11/startx
echo ${foo#*/}
echo ${foo##*/}

bar=/usr/local/etc/local/networks
echo ${bar%local*}
echo ${bar%%local*}

exit 0