ZNC is an advanced IRC bouncer and is the only bouncer that is currently supported.It logs messages ZNC is pre-installed on all xshellz servers, you just have to configure it :) Which is very easy.
Step 1: First open your shell (SSH to it) then type

Step 2: When the program asks Type a number between 1025 and 65534 this is your port so remember this port, as you will need it
Step 3: Next You probably don't want SSL, or don't know what this means, just type no
Step 4: The next one will be just press enter
If you got then someone else is using that port, just repeat from Step 1 to 4, but changing the port at Step 1
Step 5: at Type your shell account (or anything else) for its your username, remember this too
Step 6: At Type a password for your account at ZNC, don't worry if nothing is being displayed as you type, its not shown for the security. then repeat your password at
Step 7: At Type what your IRC nick is to be
Step 8: At Type what your IRC nickname is to be if your specified nickname is not available.
Step 9: At just press enter, because xShellz has an ident daemon
Step 10: At Type what your IRC real name is to be
Step 11: At Just press enter or see VHosts and type an IP which corresponds to your current server
Step 12: At Type yes
Step 13: At Type the name of your IRC server
Step 14: At type its host chat.freenode.net if its freenode
Step 15: At type yes if your IRC server supports SSL, else no
Step 16: At Type your server's public port, its probably 6697 if iyour server supports SSL or 6667 if its a standard port
Step 17: At Type the password to your IRC server, or if you don't know one, just press enter
Step 18: At Type the channels that you want ZNC to join when you first connect
Step 19: At type yes

Voila!! Your znc should be up and running! Have a coffee :P
now, to connect to it, type on your IRC client.
Now, you will be online 24/7 :D And your ZNC will save a buffer for you until you get back ;)

If you want to edit more settings, goto http://shell.xshellz.com:<your port> and login using your username and password! and you can edit at the ease of your mind!

if you want to make your znc restart itself when it gets killed or when the server is restarted, type
Then at the end of the line, add the line which checks if your znc is running every 10 minutes and which starts the znc if the server restarted.
Then press Ctrl+x then y and press enter.
Viola!!

Its OVER! :P