https://www.cyberciti.biz/faq/howto-display-clear-last-login-information/
sudo su && \
>/var/log/lastlog && \
>/var/log/wtmp && \
>/var/log/btmp
lastlog | grep $USER && \
last | grep $USER && \
lastb | grep $USER
https://www.cyberciti.biz/faq/howto-display-clear-last-login-information/
sudo su && \
>/var/log/lastlog && \
>/var/log/wtmp && \
>/var/log/btmp
lastlog | grep $USER && \
last | grep $USER && \
lastb | grep $USER