Just clone and add to your path.
This script full updates Kali Linux, and checks each directory under /opt. If it's a git directory it will pull, and if there is an update script in that directory it will then run it.
This sets the virtual monitor resolution to 1920x1080 if Kali is being run in a virtual machine. Useful if 1920x1080 isn't in the display options resolution list.
Backup a file by copying it to the same location it is in but with a _backup suffix, and then removing write and execute permissions from the backup.
cidr-to-list.sh 192.168.0.1/24 or
Converts a cidr range to a list of IPs.