Make a shell script execute commands in telnet or programs

I would like to make a shell script that executes commands on a device that I telnet to or in programs such as FTP or OpenSSL. I have already found a method in FTP, which would look something like this:

#!/bin/sh
HOST='0.0.0.0'
USER='User'
PASSWD='Pass'
FILE='~/Desktop/file.txt'
RFILE='file.txt'

ftp -n $HOST <<END_SCRIPT
quote USER $USER
quote PASS $PASSWD
binary
passive
put $FILE $RFILE
quit
END_SCRIPT
exit 0

How can I do something similar with devices I telnet to or in different programs?

Answers:

Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or not), leave a comment & I’ll get back to you as soon as possible.

Method 1

some time ago I needed something similar. You can try with something like this:

#!/bin/sh

HOST='0.0.0.0'
USER='User'
PASSWD='Pass'
CMD=''

(
echo open "$HOST"
sleep 2
echo "$USER"
sleep 2
echo "$PASSWD"
sleep 2
echo "$CMD"
sleep 2
echo "exit"
) | telnet

PS1: I user “sleep 2” because I am accessing through satellite. If it’s LAN, maybe you don’t need “sleep” at all.

PS2: just enter what you need in the CMD variable


All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

0 0 votes
Article Rating
Subscribe
Notify of
guest
0 Comments
Inline Feedbacks
View all comments