Tech Stuff » Cpanel

Deleting nouser Files – cleanup after cPanel

admin — Sat, 13 Jun 2009 21:58:53 +0000

Not many CPANEL server admin knows that when they delete user account, there are some of those user files that still left on the server. Because user has been deleted, so the files will be owned by nouser.

This can be a problem when your server is highly cycled (you add and delete users very frequently) because you can hit the system user limit. This means you cant create no more user on your system. Deleting user to add another one wont work.

Solution :

You have to remove all files that owned by no user. Usualy they placed on these directories :

/home
/usr/local/apache/conf/sites
/usr/local/frontpage
/usr/local/apache/domlogs
/var/cpanel/bandwidth
/etc/vdomainaliases
/var/cpanel/users.cache/
/var/cpanel/bwusagecache/
/var/spool/cron.suspended/

To find these files is quite easy. Just lunch :

find /usr/local/apache/conf/sites/ $ -nouser -or -nogroup $ -exec rm -f {} \;

find /usr/local/frontpage/ $ -nouser -or -nogroup $ -exec rm -f {} \;

find /usr/local/apache/domlogs/ $ -nouser -or -nogroup $ -exec rm -f {} \;

find /var/cpanel/bandwidth/ $ -nouser -or -nogroup $ -exec rm -f {} \;

find /etc/vdomainaliases/ $ -nouser -or -nogroup $ -exec rm -f {} \;

find /var/cpanel/bwusagecache/ $ -nouser -or -nogroup $ -exec rm -f {} \;

find /var/cpanel/users.cache/ $ -nouser -or -nogroup $ -exec rm -f {} \;

find /var/cpanel/bandwidth.cache/ $ -nouser -or -nogroup $ -exec rm -f {} \;

Note :

-exec rm -f {} \; meaning you execute rm -f to those files. You may change it for example : -exec chown root:root {} \;

How to configure Exim on a cPanel server to use a smart host

admin — Mon, 13 Apr 2009 19:55:13 +0000

A Smart Host is a SMTP server that will accept mail from another server and then deliver the mail for that server. For example, server1 is setup to use server2 as a smart host. Anytime someone sends e-mail on server1 it is automatically relayed to server2 regardless of the MX entrys for the domain. Server2 then accepts this message, looks up the proper delivery host/IP and attempts to deliver the message to that host.

To configure a smart host, create /etc/exim.conf.local and add the following lines. Be sure to change to the hostname or ip of the smart host server:

@ROUTERSTART@
smart_route:
driver = manualroute
domains = !+local_domains
transport = remote_smtp
route_list = * host.name.of.smart.host.server

Next run /scripts/buildeximconf

Then run /scripts/restartsrv_exim

Thats it, watch the logs for a bit to make sure it’s working!

upgrade clamav on cpanel( WARNING: ClamAV …. is OUTDATED )

admin — Mon, 13 Apr 2009 19:20:52 +0000

First, download the latest version from Sourceforge:

Code:

wget http://downloads.sourceforge.net/clamav/clamav-0.95.1.tar.gz

Extract it and move into that directory:

Code:

tar -xzf clamav-*
cd clamav*

Compile:

Code:

./configure --prefix=/usr
make
make install

Comment out examples in the config files:

Code:

replace "Example" "#Example" -- /usr/etc/freshclam.conf
replace "Example" "#Example" -- /usr/etc/clamd.conf

Get the new virus definitions:

Code:

freshclam

Then just make sure you have the latest version of the ClamAV scanner if you’re using it (this can be done from the “Manage Plugins” screen in the cPanel section of WHM).

remove plesk install from virtuozzo vzpp

admin — Mon, 06 Apr 2009 10:51:40 +0000

if you have cpanel on a virtuozzo node vps you really want to disable plesk install .

This cannot be done for selected VPSes, only for node-wide. In order to remove ‘Install Plesk’ link from the customer’s Parallels Power Panel, it is required to modify /vz/private/1/root/etc/vzcp/pp/menu.xml (on the node) file or /etc/vzcp/pp/menu.xml (in Service VPS).

There is an item looking like

item href=”$baseurl/panel/plesk” icon=”plesk” tip=”plesk_control_panel” cred=”plesk_use” svps=”deny”

Install Plesk

It should be completely removed and vzcp restarted:

# vzctl exec 1 /etc/init.d/vzcp restart

How to identify high load apache processes

admin — Tue, 03 Mar 2009 14:32:29 +0000

just paste to shell (cpanel server):

ps -axo “%C %p” |sort -nr |head -5 |while read i p; do echo -n $i; /usr/local/apache/bin/apachectl fullstatus |grep -A 1 $p; done

there is also a python script for that : apache-top.py . you can donwload it from: http://www.fr3nd.net/projects/apache-top/. it’s a nice tool but still need some customization.

How to restrict apache permissions to execute /usr/bin/perl

admin — Wed, 28 Jan 2009 13:41:38 +0000

Just change perl permissions like bellow . apache will be able of course to execute perl scripts from cgi.
-bash-3.2# ls -al /usr/bin/perl
-rwxr-xr-x 2 root root 13688 Sep 17 20:40 /usr/bin/perl
-bash-3.2# chgrp apache /usr/bin/perl
-bash-3.2# chmod 705 /usr/bin/perl
-bash-3.2# ls -al /usr/bin/perl
-rwx---r-x 2 root apache 13688 Jan 28 15:09 /usr/bin/perl

Install Ruby on CPanel

admin — Fri, 02 Jan 2009 11:46:56 +0000

If you are using CPanel 11 (the latest version available at this time) you can easily install ruby on your system using CPanel. Previously, you had to do this using operating system packages or manually from sources. Now, we can just run /scripts/installruby and this will do everything for us:

download, compile and install ruby
download and install RubyGems and some gems like rails and mongrel

/scripts/installruby
At this time it will install the latest 1.8 ruby:
ruby -v ruby 1.8.6 (2007-03-13 patchlevel 0) [i686-linux]
and the following gems (using rubygems-1.1.1):
gem list actionmailer (2.1.0) actionpack (2.1.0) activerecord (2.1.0) activeresource (2.1.0) activesupport (2.1.0) cgi_multipart_eof_fix (2.5.0) daemons (1.0.10) fastthread (1.0.1) gem_plugin (0.2.3) mongrel (1.1.5) rails (2.1.0) rake (0.8.1)
This should be enough for running ruby scripts, but if you want to use Ruby On Rails from within CPanel then you just have to complete this by running /usr/local/cpanel/bin/ror_setup. If you are interested to deploy RoR environments on CPanel you can do this from inside CPanel. For more information check out the CPanel docs.