Awk & sed Snippets for SysAdmins

March 2, 2022 – 2:00 pm

Books have been written on the subject of awk and sed. Here’s a small sample of commands I put together over the years that are useful for everyday system administration tasks. Most of these tasks …

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Article Archive for March 2011

This is a quick follow-up to my earlier post about installing Ganglia from source on SLES. Here we will install Ganglia from precompiled RPMs on an RHEL server. The basic cluster setup for this example remains the same: two clusters: CLUSTER1 and CLUSTER2 with head nodes head_node1 and head_node2

Useful iPhone Apps

March 16, 2011 – 1:49 am

Useful iPhone apps? Really? Yeah, there are a few. These may not be the best-written apps, or the easiest to use, or the most aesthetically appealing, but they perform a function that benefits your bottom line. And what else can you want from computer software if not that? So let me get started in no particular order.

Opening Custom Ports in SuSE Firewall

March 4, 2011 – 2:18 pm

Most of the servers I work with are already behind an enterprise firewall, so I rarely get to configure a software firewall. In the following example, I installed Webmin and Usermin on a SLES 11 server that had SuSE firewall enabled. Webmin and Usermin by default use ports 10000 and 20000, respectively. These ports are not in the list of common services you would find in the SuSE firewall configuration GUI. There are a couple of ways of adding custom ports to the list of the allowed services.