RedHat Enterprise Linux (RHEL)
27 Mar 2015
Making sense of Linux memory usage, Part 1: how to read “top” in CentOS.
We get this question a lot, about “Why is my Linux server using so much ram?”. In many cases, it really isn’t using much ram at all, but just to be sure we always have to check. At least half the time, really very little is being used, but the way that Linux reports ram
15 Mar 2015
Configuring additional IP addresses (virtual interfaces) on Centos Servers
You may have a Centos dedicated server or VPS, and you’ve been assigned additional IP addresses, which have not been configured by your hosting provider. There are good reasons your host won’t have configured these for you, because if you are using virtualization, many VPS control panels need to manage these IPs, and so it
03 Mar 2015
Installing Centos 6.x onto a dedicated server with hard drives bigger than 2tb (3tb, 4tb, 6tb, 8tb, or bigger)
I’m a big fan of Centos, but like anything, it’s not perfect. In Centos 5, it is nearly impossible to get a working install onto drives larger than 2tb. In Centos 6, it is possible, but not entirely straightforward. The reason for the difficulty, is that MBR (master boot record) was designed only to support
19 Feb 2015
nf_conntrack: table full, dropping packet — A solution for CentOS Dedicated Servers
A common problem you may experience is sluggish performance or disconnections from your Centos dedicated server, even though there is sufficient CPU, ram, disk i/o, etc. After some troubleshooting, you may come to believe you are being DDoS attacked, but you don’t see an unusual amount of traffic, and there’s no single IP or handful
13 Feb 2015
Troubleshooting backup problems with Idera R1soft under Centos (part 1)
Everyone knows it’s a good idea to keep backups, but it can be difficult to get them up and running, and even harder to keep them staying that way. On top of that, the backup process can make your server slow to a crawl if you have typical hard drives instead of SSDs. R1Soft is a
28 Nov 2014
e1000e NIC link failure / x9scm / x9scl / patch fix for Centos
If you’ve had problems with the nic driver failing on x9 / x10 supermicro motherboards with the intel e1000e NIC, we have a fix for you. Centos 6 on X9 motherboards (x9scl / x9scm) seems to have the most problems, but other motherboards and OS’s are potentially affected as well. There are a lot of
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