Can I grep telnet command output?

Question

I have a telnet command which prints hundreds of lines of output, Can I grep the output?

Answer 1

Use the 'script' command. If you run 'script ' before running telnet, all text that gets written to the terminal also gets written to /file/path/filename. You'll have to do 'exit' or Ctrl-D to actually write to the file or you can keep a check on the file.

Finally grep on the file using filename | grep "search text"

/file/path/filename is the path where you want to store the output of telnet.

Using script command

script /tmp/myscript.txt

then all the commands you fire in terminal and the output will go in this file. use ctrl + D when you are done, which will write to the file.

Do a grep on this file.

cat /tmp/myscript.txt | grep "textToSearch"

Answer 2

Use tee command to redirect the content to file:

telnet google.com 80 | tee outfile

Then grep the file