ipcalc is a terminal tool that lets you validate an IP address. This proves useful to me as I have scripts that automate certain remote tasks given an IP address. Instead of trusting that an argument passed is a valid IP, why not check it?
First the script would need to check if
if ! command -v ipcalc > /dev/null ; then echo "ipcalc not found. Exiting..." exit 1 fi
Now for this example, we’ll validate an IP address stored in the variable
if ! ipcalc -cs "$IP" ; then echo "Invalid IP Address" exit 1 fi