ls /var/log/
alternatives.log auth.log denyhosts faillog installer/ prime-offload.log syslog.2.gz syslog.7.gz Xorg.0.log.old
apport.log auth.log.1 denyhosts.1 fontconfig.log kern.log prime-supported.log syslog.3.gz unattended-upgrades/ Xorg.1.log
apport.log.1 bootstrap.log dist-upgrade/ fsck/ kern.log.1 speech-dispatcher/ syslog.4.gz upstart/ Xorg.1.log.old
apport.log.2.gz btmp dmesg gpu-manager.log lastlog syslog syslog.5.gz wtmp Xorg.failsafe.log
apt/ cups/ dpkg.log hp/ lightdm/ syslog.1 syslog.6.gz Xorg.0.log Xorg.failsafe.log.old