问题解决了，多谢！！！

dragoncgs

#!/bin/sh
   tar czvf $1.$(date +%Y%m%d%-H%M%S).tgz $1
   exit $?

sunxiaobo

$? means "Expands to the exit status of the most recently executed foreground pipeline".

zhy2111314

$?是指上一条命令的返回值。

ivyharry

if $? returns 0 means the last command was good
if it is something else
mean last command was bad

ccsu

0 则说明成功
非0 则说明失败。