CentOS
cat /dev/null > /var/log/wtmp cat /dev/null > /var/log/btmp cat /dev/null > /var/log/lastlog cat /dev/null > /var/log/secure history -cw
Ubuntu
cat /dev/null > /var/log/wtmp cat /dev/null > /var/log/btmp cat /dev/null > /var/log/lastlog cat /dev/null > /var/log/auth.log history -cw
原文：https://www.cnblogs.com/shenjingwa/p/15239815.html