How to disable known host check in ssh temporarily?

ssh -o "UserKnownHostsFile=/dev/null" -o "StrictHostKeyChecking=no" user@host

How to configure static IP on openSUSE?

Configure static ip address

Edit /etc/sysconfig/network/ifcfg-eth0 :

STARTMODE='auto'
BOOTPROTO='static'
IPADDR=10.0.0.99/24
NETMASK=255.255.255.0

Configure the DNS server

Edit /etc/sysconfig/network/config :

NETCONFIG_DNS_STATIC_SERVERS="10.0.0.1"

Configure the default gateway

Create or edit /etc/sysconfig/network/routes :

default 10.0.0.1 - -

Restart the network system

systemctl restart network

Burn ISO file to create bootable USB

dd bs=4M if=/home/ubuntu/ubuntu-21.10-live-server-amd64.iso of=/dev/sdb conv=fdatasync status=progress

Mount a crypto LUKS disk image

Run losetup without parameters to find an available loop device index. Say if loop 0,1,2,3 exist, we can use 4.

• Create the loop device:

  losetup loop4 ./crypto_luks.img

• Open the LUKS drive:

  cryptsetup open /dev/loop4 archive

"archive" is an arbitrary name I selected. After entering the password, your drive should become available to mount:

mount /dev/mapper/archive /mnt