UBUNTU Shell Script

I already made the first 4 posted below I would need help for the next steps

Make a shell script in UBUNTU that permits:

1. Create a group named cpen452

2. Create a user which group be cpen 452

3. Search all the files with extension .txt and and delete them

4. Create a directory called quiz and create in that directory 10 files with the same name that the last characters be a consecutive number between 0 and 9; everything has to be realized with the same command.

5. Realize a copy of the home directory in a usb

6. List all the processes en the system y ("Kill") one of them according to relevance

7. Send a message to all the users of the system : "Save all your work and close session, the system will turn off in 2 minutes"

8. Close

Exit

*Copy the script in the home directory (of each one of the integrants)

I want to create a "menu" in a script that allows all that

I already have the first 4 except the file deletion

Here they are:

sudo groupadd -g 10000 cpen452 sudo useradd -G cpen452 cpen452 find . -type f -name "*.txt" mkdir quiz cd quiz today="$( date +"%Y%m%d" )" number=0

while test -e "$today$suffix.txt"; do (( ++number )) suffix="$( printf -- '-%02d' "$number" )" done

fname="$today$suffix.txt"

printf 'Will use "%s" as filename ' "$fname" touch "$fname"