Setting up the Z39.50 and SRU Server for KOHA

open terminal in Ubuntu or Debian

koha-z3950-responder --enable <instancename> for example library

Start the server with:

koha-z3950-responder --start <instancename>

if any error occurred , download z3950_responder.pl from below

https://github.com/Koha-Community/Koha/edit/master/misc/z3950_responder.pl 

copy this file into  /usr/share/koha/lib/misc/z3950_responder.pl 

if the misc is not available in lib directory then create new directory and copy             z3950_responder.pl in it.

then issue the command koha-z3950-responder --start <instancename>

your z39.50 responder will start.

The default port is 2100 (if you need to change, follow the given instruction)

Modify config.xml ie.g. to change the listening port from the default (2100). pqf.properties defines rules for translating the incoming Z39.50 queries, and may need to be customized for any custom search fields.