切换用户

[root@localhost ~]# su miaojiang
[miaojiang@localhost root]$ env | egrep "USER|MAIL|PWD|LOGNAME"
USER=miaojiang
MAIL=/var/spool/mail/root
PWD=/root
LOGNAME=miaojiang
[miaojiang@localhost root]$ exit
exit
[root@localhost ~]# su - miaojiang
Last login: Thu Jan  9 21:36:43 CST 2025 on pts/2
[miaojiang@localhost ~]$ env | egrep "USER|MAIL|PWD|LOGNAME"
USER=miaojiang
MAIL=/var/spool/mail/miaojiang
PWD=/home/miaojiang
LOGNAME=miaojiang
[miaojiang@localhost ~]$