Shell Programming and Scripting

echo "SWITCHFEED|~|VENDORNAME=CISCO|~|VENDORMODEL=CISCO2192|~|SWITCH=XYZ1|~|IPADDRESS=111.44.232.243|~|" | /usr/xpg4/bin/awk -F"[=|]" '{print $13}'

111.44.232.243

/usr/xpg4/bin/awk -F"[=|]" '{print $13}' file2

awk -F'[|=]'   '     ##making field separator as |(pipe) and = here.
FNR==NR{             ##FNR==NR condition will be TRUE only when first Input_file named Input_file1 is being read, FNR and NR both represents the number of lines in an Input_file the only difference is FNRs value gets RESET once awk starts reading next Input_file and NRs value will be keep increasing till all the Input_file(s) are read.
a[$0];               ##creating an array named a whose index is current line of Input_file1.
next                 ##next is awk in-built keyword which skips all further statements.
}
($13 in a)           ##This condition will be running only when second Input_file named Input_file2 is being read, checking here if $13(field 13) which has IP address of Input_file2 is present in array a or NOT if present then no action is mentioned, so default action print of current line of Input_file2 will happen here.
' FiLE1 FiLE2        ##Mentioning names of Input_file(s), Input_file1 and Input_file2 here.