PUBLIC MARKS from solrac with tag admin

Learn how to check the integrity of your Linux filesystems, monitor free space, and fix simple problems. Use the material in this article to study for the Linux Professional Institute (LPI) 101 exam for Linux system administrator certification—or just to check your filesystems and keep them in good working order, especially after a system crash or power loss.

PowerHA for AIX is the new name for HACMP (High Availability Cluster Multiprocessing). HACMP is an application that makes system fault resilient and reduces downtime of applications. This article introduces PowerHA and provides a detailed explanation of how to configure a two node cluster. This document is very useful for understanding PowerHA and setting up a two node cluster.

One of the most novel and differentiating features of a UNIX system is its command line. With just a few keystrokes, including a bit of "glue", you can use the command line to combine the finite set of UNIX utilities into innumerable, impromptu data transforms. These articles will teach you the basics of the UNIX shell and discover how you can use the command line:

Keeping multiple machines synced can be challenging. Fortunately, a powerful tool is available to make the task easier: rsync, an open source utility that provides fast incremental file transfer. An important feature of rsync not found in most similar programs/protocols is that the mirroring takes place with only one transmission in each direction.

Start tuning your Linux system for power efficiency. This article will get you up to speed on the components and concepts you need to fine-tune a Linux-based System x server for power efficiency. Learn how to enable the Linux CPUfreq subsystem, get instruction on C and P states, and determine which of the five Linux in-kernel governors you need to boost power efficiency on your system.

Learn the steps involved in migrating your environment to that of a Linux client, including technical planning. Based on customer experiences, this article offers a comprehensive guide to planning and executing your migration while minimizing disruption to your users.

Here's a great cheet sheet on managing NFSv4 ACLs on different filesystem with different commands. This article discusses and compares the different commands that you might use to migrate from one filesystem to another.

The built-in administration console provided by Django is one of its biggest selling points. Find out how to extend the existing admin application without ever modifying the source. Learn three ways to customize this powerful application to suit your needs

For embedded Linux engineers and aficionados, one exciting aspect of cloud computing is the sudden interest in thin Linux clients. Explore cloud computing from a Linux perspective and discover some of the most innovative and popular Linux-based solutions—with a particular view toward Linux thin clients and environmentally beneficial options.

As a Linux administrator, you may encounter rootfs errors like cannot mount rootfs and kernel panic when you try to reboot a server after attaching volumes from external storage or even after installing a new Linux operating system. This article outlines the Linux booting process on an x86 platform, shows why this problem happens, and offers four tips to avoid it or fix it. This is a straightforward approach to finding a quick solution that can help you avoid a lot of grief.