I am required to test at least 130 ip addresses and ports. I am hoping to write a bash script such that it reads the ip address and ports from an input file.
I have the following
while read line do telnet $line >> $2 done < $1
This is a crappy code as it cannot determine whether its connected or failed, and I have to rely on its auto escape character to disconnect from a connection.
How can I improvise this such that it updates $2 with the status quickly? I am working on Redhat and do not have netcat or expect installed..