How to insert multiple IP addresses in a pg_hba.conf file via unix shell script?

I need to write some IP addresses to the pg_hba.conf file of my Postgresql, in order to allow remote access from those IP to my machine. I have the following code in shell script to do that for a single IP address #!/bin/bash ######## PostgreSQL Child Server Host or IP Address serverhost=$1 ######## PostgreSQL Child Server pg_hba.conf File Path pghbapath=$2 ######## Shell Script Command to write the data at the end of the pg_hba.conf file sed -i "$ a host all all $serverhost/32 md5" $pghbapath An example command to execute the above bash script is ./reset_ip.sh 192.168.10.27 /root/Desktop/BashScripts/pg_hba.conf The above is working fine, but I have a lot of IP addresses with me. So, instead of manually running the command each and every time for a different IP address, is there a command which can take multiple IP addresses at once and write them to the pg_hba.conf file in one go? Edit - Thanks a lot for the answer Luuk. I tried it and it worked. Now, suppose if instead of having a text file to hold all the address, I want to write the multiple IP addresses separated by commas in the command line itself, somewhat like ./reset_ip.sh 192.168.10.27,192.168.10.28,192.168.10.29,192.168.10.30 /root/Desktop/BashScripts/pg_hba.conf Is it possible? What I basically want is to be able to pass multiple values for a single variable via the command prompt.