ext2, ext3 and ext4 are all filesystems created for Linux. This article explains the following: High level difference between these filesystems. How to create these filesystems. How to convert from one filesystem type to another. Ext2 Ext2 stands for second extended file system. It was introduced in 1993. Developed by Rémy Card. This was developed [...]
Linux
Anacron is the cron for desktops and laptops. Anacron does not expect the system to be running 24 x 7 like a server. When you want a background job to be executed automatically on a machine that is not running 24 x 7, you should use anacron. For example, if you have a backup script [...]
As we discussed in our Linux performance monitoring introduction article, measuring IO subsystem performance is very important. If someone is complaining that a database (or any application) running on one server (with certain filesystem, or RAID configuration) is running faster than the same database or application running on another server, you might want to make [...]
SVN stands for Subversion. Subversion is a free/open-source version control system. Subversion manages files and directories over time. A tree of files is placed into a central repository. The repository is much like an ordinary file server, except that it remembers every change ever made to your files and directories. This allows you to recover [...]
Question: How do I identify my file system type? I like to upgrade my current file system to the latest ext4. Before that I would like to know what my current file system type is for various mount points I have on my UNIX system. Answer: Use any one of the five methods mentioned below [...]
Process is a running instance of a program. Linux is a multitasking operating system, which means that more than one process can be active at once. Use ps command to find out what processes are running on your system. This article explains 7 practical usages of ps command and its options. To monitor and control [...]
Using sar you can monitor performance of various Linux subsystems (CPU, Memory, I/O..) in real time. Using sar, you can also collect all performance data on an on-going basis, store them, and do historical analysis to identify bottlenecks. Sar is part of the sysstat package. This article explains how to install and configure sysstat package [...]
If you are a sysadmin, you should secure your Apache web server by following the 10 tips mentioned in this article. 1. Disable unnecessary modules If you are planning to install apache from source, you should disable the following modules. If you do ./configure –help, you’ll see all available modules that you can disable/enable. userdir [...]
My name is Ramesh Natarajan. I will be posting instruction guides, how-to, troubleshooting tips and tricks on Linux, database, hardware, security and web. My focus is to write articles that will either teach you or help you resolve a problem. Read more about