Jul 2, 2012
Java leapsec issue causes high CPU
Seems like a bug is going around caused by leapsec in Java that causes high CPU. There is a simple fix for the issue. For CentOS / RHEL 5 & 6 /etc/init.d/ntpd stop; date; date `date +”%m%d%H%M%C%y.%S”`; date Wait for the CPU to go down and then restart ntpd /etc/init.d/ntpd start After doing this, see if the cpu usage falls down using top or your tool of choice. If not, restart of the ntpd... read more
Apr 14, 2012
Disable ipv6 on CentOS 6
With several late CentOS 6.2 systems being built on the network I have been running into network disconnect and performance issues being caused by IPV6. Since I am currently not using it on my network I decided to disable it. Here is what I found from several different resources on the Internet. We can modify /etc/sysctl.conf: net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1... read more
Apr 7, 2012
Installing and updating ESXi 5 VMtools with OSP
Recently I had the pleasure of building n ESXi Hypervisor 5 server. Server sprawl has taken over and the time has come to consolidate. The first VM’s to create are my web and database servers. After the build I was needing to install VMtools to get the full functionality on my CentOS / SL / RHEL 6 servers. There are several ways to do this but a way to add a repo and have it install updates when I... read more
Oct 1, 2011
Configure SNMP for RHEL 6
SNMP is a very powerful and useful tool to add to your Linux system. It is great for sending alerts to different monitoring systems like Nagios and many other great products. But first it needs to be installed and configured before you can put this under rated tool to work. Install SNMP using yum, you will need net-snmp-utils, net-snmp, net-snmp-libs. $ sudo yum install –y net-snmp-utils net-snmp... read more
Nov 24, 2010
I know this is Linux and viruses are not supposed to be an issue, but face it we have other operating systems connecting and they are known for bringing these little monsters in, so it is our duty to seek and destroy those on the server. In steps ClamAV, a fast, free and efficient anti-virus solution. Dag Wieers maintains many packages for downloads and he just happens to have what we are looking for with...
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ClamAV on CentOS 5.5
