tmutil listlocalsnapshots /
You will be presented with a list of snapshots like this:
Snapshots for disk /:
com.apple.TimeMachine.2021-02-10-151840.local
com.apple.TimeMachine.2021-02-10-161441.local
com.apple.TimeMachine.2021-02-10-171501.local
com.apple.TimeMachine.2021-02-11-100416.local
com.apple.TimeMachine.2021-02-11-105919.local
com.apple.TimeMachine.2021-02-11-124545.local
com.apple.TimeMachine.2021-02-11-151804.local
sudo tmutil deletelocalsnapshots 2021-02-10-151840
# Generate Script
tmutil listlocalsnapshots / | awk 'BEGIN{FS="."} {if($4!="") print "tmutil deletelocalsnapshots " $4}' > delete_snapshots.sh
# Give Execution Permissions to the script
chmod 744 delete_snapshots.sh
# Remember to run your script with sudo
sudo ./delete_snapshots.sh