grep or 条件

[huangzhibin@localhost ~]$ df -hT |grep  'sda1\|sda3'
/dev/sda3     ext3    225G  162G   52G  76% /
/dev/sda1     ext3    122M   12M  104M  11% /boot


[huangzhibin@localhost ~]$ df -hT |grep -e "sda1" -e "sda3"
/dev/sda3     ext3    225G  162G   52G  76% /
/dev/sda1     ext3    122M   12M  104M  11% /boot