I have installed ircd-hybrid on my Ubuntu Server (, example.com).
We use #teamchannel to communicate inside the team.

The question is: how can I send some short message from example.com to #teamchannel from the bash script? e.g. example.com: Alert! The server is rebooting now


I have found a perl script which does exactly what I needed.


use console irc client

apt-get install ii
ii -i /tmp -s
echo "/PRIVMSG #teamchannel example.com: Alert! The server is rebooting now" > /tmp/irc/in
| improve this answer | |
  • Thanks, but this does not work for me. After ii the shell waits, when I end the command with &, the second command executes but without message. – takeshin Sep 21 '10 at 13:50
  • red the 'out' file to debug problem: find irc directory(/tmp/SERVERNAME),cd /tmp/SERVERNAME and cat out,then echo message and read out. – bindbn Sep 21 '10 at 20:49

IRC is a simple text and line oriented protocol, so it can be done with the basic linux tools. So, without installing ii:

echo -e 'USER bot guest tolmoon tolsun\nNICK bot\nJOIN #channel\nPRIVMSG #channel :Ahoj lidi!\nQUIT\n' \
| nc irc.freenode.net 6667

In this command, nc does the network connection, and you send a login info, nick, join a channel named "#channel" amd send a message "Ahoj lidi!" to that channel. And quit the server.

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  • add \nQUIT at the end of the list of commands to quit right after sending the one message – Walter Heck Dec 23 '11 at 10:10

One solution would be to use expect to script communication with the IRC server using a telnet client.

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  • Do I need expect when I want to send the message from the same machine where the IRC server is installed? – takeshin Sep 21 '10 at 13:24
  • you do.. the above solution would work well with expect. – Crankyadmin Sep 21 '10 at 14:22
exec 3>/dev/tcp/example.com/6667
echo "NICK nickname1234" >&3
echo "USER nickname1234 8 * : nickname1234" >&3
echo "JOIN #teamchannel" >&3
echo "PRIVMSG #teamchannel Alert!" >&3
echo "QUIT" >&3
cat <&3
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  • 2
    A bit of text around the shell script would go a long way to making this a better answer. – HBruijn Oct 24 '14 at 20:08

If you need to supply a password and use ssl you can do something like this.

#!/bin/bash -e


echo USER $USER 8 * : $USER
sleep 1
echo QUIT
) | ncat --ssl $IRC_SERVER $IRC_PORT

The script should be run like this:

./post_to_irc.sh your_user your_pass irc_server 6667 "#target-channel" "Your message"

This is similar to an earlier example using nc but I found I had to use ncat to get it working with our IRC server which has been set up with SSL.

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