history 命令添加时间戳

echo 'export HISTTIMEFORMAT="%F %T whoami "' >> /etc/profile

注销，重新登录

993 2017-08-11 05:07:14 root exit

994 2017-08-11 04:47:21 root w

995 2017-08-11 04:47:27 root history

996 2017-08-11 04:50:09 root ls -a

997 2017-08-11 05:02:11 root tail -f .bash_history

998 2017-08-11 05:02:24 root w

999 2017-08-11 05:03:23 root tail -f .bash_history

1000 2017-08-11 05:07:21 root history