Script to acknowledge if task already done then update text file/list

I plan to have a script run that will update our Macs with new Adobe licensing package/installer but I don't want it to run if the task has ran before. I'd like to see a script that can check for a local file (ex. /Library/adobecc2018.txt) which would get placed at this location after re-serialization has been completed once. If the adobecc2018.txt file is not there the full script will run. If the adobecc2018.txt is there I want to the script to end and not go any further. Also, I will have another .txt file sitting on a network share and I'd love to see the file get populated with the name of the computer once the script runs so we have a list of computers that we can look at to see which computers have been fixed and which have not. I found the script I worked on last year but we didn't use it. So the first part of my question is answered but still need to figure out how to add text into a .txt. So example: /share/adobeupdate.txt I'd like to see something like this: ComputerName-Date ComputerName2-Date ComputerName3-Date ComputerName4-Date ComputerName5-Date etc. #!/bin/bash echo "Adobe Update Script" #### #### If file /Library/Scripts/adobecc2018.txt DOES exist then exit #### if [[ -f "/Library/adobecc2018.txt" ]] ; then echo '2018/19 Adobe Serialization Fix Already Applied - No more actions required' exit fi #### #### If file /Library/Scripts/adobecc2018.txt does NOT exist continue script #### if [ ! -e "/Library/adobecc2018.txt" ]; then echo 'Adobe is using the OLD serial number - Now applying new 2018/19 Adobe Serialization' # touch /Volumes/shares/macscripts/adobecc2018_serialization_fix.command sudo touch /Library/adobecc2018.txt echo 'Adobe 2018/19 Serialization Completed' fi # Script End exit 0