Introduction Done LS Done MKDIR Done Cd Done Copy, Move, SCP, Rsync Done CAT Done Vi/Vim GREP FIND Locate User management Group Password SUDO permission Permission Spacial permission ACL permission Attributes Date Link TAR (Archive) Systemctl Network Network Teaming< SED AWK CUT Echo Alias NTP/ Cronyd Crontab At SSH Partition LVM SWAP RPM YUM / DNF BootLoader Basic monitoring command SCSI/ISCSI RAID Cockpit Apache Samba NFS FTP PXE Boot KVM DNS DHCP Runlevel Root password break GRUB password Patching