On a fresh Centos server with CPanel installed it seems that chkservd was not running. chkservd is a little CPanel utility that allows you to check from WHM what applications it will monitor, and in case there is a problem with any of those services it will restart it and send a notification to the administrative account. If for some reason chkservd was not installed during the initial installation process of CPanel we can reinstall it later by running:
/usr/local/cpanel/bin/chkservd-install
But running this on this Centos system can given the following error:
Unable to locate chkservd init script for OS CentOS 4.3
It seems that the install script is checking the OS installed. A quick look inside the script will show us that this is done using some internal CPanel function:
$os = Cpanel::cPanelFunctions::getos();
To solve this, without changing the internal CPanel scripts, was to make it think that this is one of the supported systems and since Centos4, is basically RHEL4, I changed the distribution banner to RHEL, this way:
/etc/redhat-release
CentOS release 4.3 (Final)
#change from:
“CentOS release 4.3 (Final)”
#change to
“Red Hat Enterprise Linux ES release 4”
After this change, the install script ran without any error and installed chkservd properly and it started it ok. I then changed the banner back to the original statement.
This could have been done also by copying the init scripts from redhat:
/usr/local/cpanel/src/chkservd/init/chkservd.init.redhat
and renaming them
/usr/local/cpanel/src/chkservd/init/chkservd.init.centos…
After this chkservd is running just fine on this Centos server and it can be configured from WHM (Service Configuration >> Service Manager) as on any other CPanel system.
