Techpository

ifconfig
ip link
nmcli

ethtool:

Display NIC firmware:
ethtool -i ethX # Where X=[0|1|2…]

arping -I eth0 192.168.2.1

rm /etc/machine-id
systemd-machine-id-setup

hostnamectl set-hostname name “newname”
hostname name “newname”

find / -user root -perm -4000 -print 2>/dev/null
find / -perm -u=s -type f 2>/dev/null
find / -user root -perm -4000 -exec ls -ldb {} \;