1、查看系統版本

????????cat /etc/redhat-release?

????????uname -a

2、查看所有賬號

????????cat /etc/shadow

3、修改 root 密碼

????????passwd

3、查看賬號ID

?????????id jinzhi

4、查看登錄日志

????????lastlog?

5、查看操作日志

????????cat .bash_history
????????sudo cat /home/yunwei/.bash_history

????????sudo grep root /var/log/secure ?# 認證日志（登錄/登出）
????????sudo grep root /var/log/messages ?# 系統事件日志

? ? ? ? sudo dmesg | grep -i "error\|kill"
? ? ? ??sudo grep -i "oom\|kill\|filebeat" /var/log/messages
?

6、查看root進程

????????ps -u root

7、禁用 jinzhi 賬號密碼

?????????sudo passwd -l jinzhi

8、禁用 jinzhi 賬號

?????????sudo usermod -L jinzhi