Bash

bash utilities
fish shell

Change default shell to fish

chsh -s /usr/bin/fish

It will then prompt you to enter your password

Change default shell back to bash

chsh -s /bin/bash

Change default visudo editor

sudo update-alternatives --config editor

set ownership of folder to current user

chown -R $(whoami) ~/FOLDER

for loop (foreach doesn't work in almalinux?)

All these assume that there is a txt file called serverips.txt with IPs separated by new lines (enter, \n etc)

for ip in $(cat serverips.txt); do ssh-copy-id root@$ip; done

for ip in $(cat serverips.txt); do ssh root@$ip passwd USER; done

A way to see if all servers are connected (after copying ssh keys)

for ip in $(cat serverips.txt); do ssh root@$ip "hostnamectl"; echo ""; done

Make user sudo without password (has issues with passwords that have special characters)

for ip in $(cat serverips.txt); do ssh USER@$ip 'hostnamectl; echo ""; sudo echo "USER ALL=(ALL) NOPASSWD:ALL" | sudo -S tee -a /etc/sudoers.d/ansible_admin'; done

Change machine-id

In cases where you clone a machine, they would have the same machine-id
Check your machine-id

cat /etc/machine-id

# remove or move
/etc/machine-id

sudo systemd-machine-id-setup

cat /etc/machine-id