‘’与“”
[root@andon ~]# name='$date'
[root@andon ~]# echo $name
$date [root@andon ~]# name=abc
[root@andon ~]# echoname="$name"
[root@andon ~]# echo $echoname
abc
``(esc下面的按键)与$()
[root@andon ~]# name=`date`
[root@andon ~]# echo $name
Tue Jun 14 15:54:12 CST 2016 [root@andon ~]# name=$(date)
[root@andon ~]# echo $name
Tue Jun 14 15:56:24 CST 2016