SLES (SUSE Linux Enterprise Server)

Cheat sheet

Quickstart

• Basic commands

# displays system version
cat /etc/os-release

# gets network information
ip a

# displays date
date

# updates date
su -c 'date -s "11 DEC 2022 21:30:00"'

# shuts down the system
su -c 'shutdown now'

• Text editors

# installs vi
zypper install vi

• Time Synchronization with NTP (Network Time Protocol) (docs)

# installs chrony
zypper install chrony

# edits configuration
vi /etc/chrony.conf

# starts and enables chrony service
systemctl start chronyd.service
systemctl enable chronyd.service

• Hostname

# updates hostname
hostnamectl set-hostname <new_name>

# displays hostname (after logout/login)
hostname

• Static IP Address

# edits network interface configuration
vi /etc/sysconfig/network/ifcfg-eth0

# restarts network service
systemctl restart network

# displays routes configuration
more /etc/sysconfig/network/routes

# displays name resolution configuration
more /etc/resolv.conf

• Enable SSH

# switches to root account
su

# installs OpenSSH
zypper install openssh

# starts sshd service and checks status
systemctl start sshd

# checks sshd service status
systemctl status sshd

# enables sshd service
systemctl enable sshd

# adds sshd service in firewall
firewall-cmd --permanent --add-service=ssh

# reloads firewall
firewall-cmd --reload