Featured »

April 16, 2013 – 12:39 pm |

Imagine you have an HPC cluster with a hundred compute nodes named node001-node100. The two commands below will help you generate a list of node names – either all name on one line or one name per …

Read the full story »
Networking

Unix and Linux network configuration. Multiple network interfaces. Bridged NICs. High-availability network configurations.

Applications

Reviews of latest Unix and Linux software. Helpful tips for application support admins. Automating application support.

Data

Disk partitioning, filesystems, directories, and files. Volume management, logical volumes, HA filesystems. Backups and disaster recovery.

Monitoring

Distributed server monitoring. Server performance and capacity planning. Monitoring applications, network status and user activity.

Commands & Shells

Cool Unix shell commands and options. Command-line tools and application. Things every Unix sysadmin needs to know.

Home » Archive by Tags

Articles tagged with: memory

How to Really Kill Computer Viruses

February 21, 2010 – 6:34 am | 13 Comments
How to Really Kill Computer Viruses

How do you know if your computer has a virus? Is it connected to the Internet? Then it has a virus. Many computer viruses and other malicious applications are very resilient and will actively resist any attempts to deactivate and remove them. Some viruses can even delete your antivirus application or prevent it from working properly. Many viruses cannot be effectively removed once they are loaded in memory and active.

Linux and High I/O Wait

December 21, 2008 – 12:07 am | 3 Comments
Linux and High I/O Wait

When you look at the CPU activity of your computer, one of the parameters is the iowait. This value shows how much time your CPU wastes while it is waiting for I/O operations for complete. …

Partitioning System Disk

July 24, 2008 – 8:25 pm | 3 Comments
Partitioning System Disk

When performing a new Unix OS installation you are usually presented with a choice of accepting the default partitioning layout or going into advanced settings and defining your own partitions. The default layout will normally …

Effective Virus Protection

May 28, 2008 – 5:13 pm | 3 Comments
Effective Virus Protection

How do you protect your computer from viruses? Most computer users just buy antivirus software, install it, and reboot their PC – done. If only it was that easy. Over the past several years percentage of home and business computers infected with viruses has been steadily growing. Most PCs are sold these days with preinstalled antivirus software. And yet, the number of infected computers keeps on growing…

Linux performance tuning

August 22, 2007 – 2:40 pm | 4 Comments
Linux performance tuning

Linux Performance Tuning
April | May 2007 | by Jaqui Lynch
Note: This is the second article in a two-part series. The first installment was published in the February/March issue.
In last issue’s article I introduced basic Linux* …

Useful Applications

October 30, 2006 – 8:07 am | One Comment
Useful Applications

There is a handful of small and usually free applications that can make your computera whole lot safer, faster, and more productive. The following is a brief overview of some of the most useful applications. …

Solaris performance monitoring

November 28, 2005 – 4:47 pm | 6 Comments
Solaris performance monitoring

The following is a brief overview of common performance monitoring tools for Solaris, including built-in tools, freeware add-ons, and commercial applications.
Souce: http://www.sunperf.com/perfmontools.html
Built-in Tools
vmstat
The vm in vmstat stands for Virtual Memory, of course. So let us …