let telnet execute single command in one line

问题:

hey i can login into telnet with "telnet localhost 4242" now i want to execute a single command "show network".

How can i do this in one line ?

something like that

$ telnet localhost 4242 <- "show network"

woa here the output i want

回答1:

I found expect to do exactly what i want, wait for a certain output and then act upon it:

expect << EOF spawn telnet localhost 4242 expect -re ".*>" send "show network\r" expect -re ".*>" send "exit\r" EOF 

回答2:

If you don't have to log in or anything, you can use a "here document" like this:

telnet localhost 4242 << EOF show network EOF 

文章来源: let telnet execute single command in one line