[CWB] Upgrade of CQPweb server

[Stefan Fischer]

Hi everyone,

I would like to upgrade a server running CQPweb. I am aware of the system administrator's manual, but this server was not set up by me. Therefore, I would like to ask a couple of questions in advance to avoid potential pitfalls.

We want to upgrade from Ubuntu 22.04 LTS to 24.04 LTS. Has anyone faced issues with that upgrade? I vaguely remember that an earlier Ubuntu upgrade caused some problems due to changing defaults.

As far as I can see, only Perl will be affected by a major version change. The MySQL version seems to remain the same. I guess that means I'll have to reinstall cwb and cwb-perl from SVN. Our current system (cwb, cwb-perl, CQPweb) is based on revision 1826.

We were also thinking about an update of CQPweb (revision 1826, 3.3.17). However, I am somewhat uncertain about the version policy of CQPweb. The website (https://cwb.sourceforge.io/cqpweb.php#install) mentions 3.3.15 as the latest version. Where, in terms of stability, does revision 1826 stand? Is there a more recent revision that provides the same level of stability?

I checked the administrator's manual and could not find any necessary migration steps for 3.3.17 or later. Does that mean that I can simply compare r1826 with the latest SVN revision and merge any changes into the installed .php files?

While going through the current .php files, I found files named like the following examples:
usr/31/index.php
usr/4a/index.php
...

Do they serve a purpose? They all contain the same line of code:
<?php exit(1);

Finally, is it possible to restrict access to the administration interface (/adm/) to an IP range or would that break any functionality for regular users?

Thank you in advance!
Stefan