Bash Script Help!

I need this script refined so that if $j already exists in the file it does not echo the two start/stop entries. #!/bin/bash SMATCH=`echo $SUDO_USER | cut -d@ -f2`; if [ "$SMATCH" != "[login to view URL]" ] ;then { S_USER="$SUDO_USER@[login to view URL]" } else { S_USER=$SUDO_USER; } fi; for i in $( ls -1A /home/$S_USER/*.service); do j=$(basename $i) chmod 755 /home/$S_USER/$j chown root:root /home/$S_USER/$j mv /home/$S_USER/$j /etc/systemd/system/ systemctl enable $j systemctl daemon-reload k=$(cat /etc/sudoers.d/DEV | head -1 | awk '{print $1}'); j=$(echo $j| cut -d. -f1); echo "" >> /etc/sudoers.d/DEV echo "$k ALL=PASSWD: /bin/systemctl start $j" >> /etc/sudoers.d/DEV echo "$k ALL=PASSWD: /bin/systemctl stop $j" >> /etc/sudoers.d/DEV done