How to manually run Cpanel backup via ssh A lot of hosting providers and even customers use Cpanel for virtual hosted websites. Cpanel is a powerful management system that when installed takes over your whole server and and allows a normal user to easily administer and manage a linux server. Read more…
I’ve had times where I need to get a quick serial console going to a device like an APC PDU. I typically use minicom in the past but sometimes it’s just not available on the machine. I was on a Raspberry Pi using a USB Serial adapter, and I Read more…
Are you having a problem and don’t have a bootable CentOS DVD and no PIX server to get into rescue mode. Then try single user mode. In single user mode, your computer boots to runlevel 1. Your local file systems are mounted, but your network is not activated. You’ll have Read more…
I’ve had this issue a couple of times, when I attempt to ssh from our CentOS jump server to another CentOS server, I have had ssh hang and take up to 60 seconds or more before I get a bash prompt on the remote server. I have found this is Read more…
We have a client with a multi-data center installation of Cassandra. While, I was in another one of our data centers working on a client cluster and attempting to run a rebuild and got a stream error. Cassandra server is running package cassandra30-3.0.9-1.noarch I ran the following command; nodetool -u Read more…
I just had a client recently ask, “Why doesn’t my secondary dns server update a zone?” They’re running pdns and poweradmin packages: poweradmin-2.1.4-1.el6.noarch pdns-4.0.3-1pdns.el6.x86_64 pdns-backend-mysql-4.0.3-1pdns.el6.x86_64 on both ns1 and ns2 servers. The ns2 server is set to be slave of ns1, so any changes made on ns1 automatically get populated Read more…
Today I got the error message: Error: Could not stat() command file ‘/var/spool/nagios/cmd/nagios.cmd’! The external command file may be missing, Nagios may not be running, and/or Nagios may not be checking external commands. An error occurred while attempting to commit your command for processing. I upgraded from Nagios Server 3.2.0 Read more…
This was a weird one for me. We had a client ask for a CentOS 7 installation, one of the other techs always installs CentoOS 6 to do a Dell firmware update then leaves it to install what the client requests. I went to install CentOS 7 and it wouldn’t Read more…