Probably, this question would be more correct to ask on the forum, where support is provided for services that are used on your network.
You need to find out the exact name of the services. Of the commonly used ones, this can be: Anope
or something else.
In fact, services had to be configured in such a way that in the event of an emergency (crash), they would automatically restart after a while.
If the services are completely disconnected from the network and you do not have command control above them, then everything is much more complicated.
To restart or to reconfigure services, you must have access to a remote computer (server machine) on which they are running. Usually, special programs are used to connect to a remote computer and then manage it.
For example: "PuTTY
" - is an SSH and Telnet client. You must know the Host/IP
for to enter. Because access for unauthorized people will be closed for obvious reasons.
In addition, you should understand (know) what commands will need to be executed if the remote computer is running under the system "Linux
Your admin (sysop) who was doing this should have left deputies to whom he would have left all the instructions for the troubleshooting. I wish him a speedy convalescence!