October 11, 2010
by Mohan Cheema
1 Comment
One of the “must do’s” on setting a secure apache webserver environment is to disable directory listing. As a default Apache will be compiled with this option enabled, but its always a good idea to get rid of this setting unless its really necessary.
September 8, 2010
by Mohan Cheema
2 Comments
Introduction
This document will teach us how to setup Tomcat to run Multiple instances of it.
Intended Audience: System admins.
Instruction to installing Tomcat so that we can run multiple instances.
1. Install the Tomcat files
August 23, 2010
by Mohan Cheema
0 comments
As SVN admin we are asked to send an email to release managers and testers for all the commits made to the repository so that release managers can update their release sheet and testers can do the testing. This is small post-commit hook for SVN which sends out an email to release manager and testers.
August 23, 2010
by Mohan Cheema
1 Comment
As SVN admin we need to make sure any commits made to the repository should have comments associated it with. The reason to have comments during commits is simple to know what has been fixed or what new has been added to the repository. Here is the simple shell script I have written to stop the commits if comments has not been added.
August 12, 2010
by Mohan Cheema
0 comments
Everyone probably know about memcached (http://memcached.org/) and its high performance name-value based memory object cache interface. Its main purpose is to provide an easy to use distributed caching engine in a multinode environment. However, have you ever wanted to let memcached handle replication?
July 6, 2010
by Mohan Cheema
0 comments
Linux shells provide a recursive Grep function in the form of the -r switch.
However, in Solaris this function have to be replicated using the piped command as follows:
find . | xargs grep ‘pattern’
Or if your shell doesn’t has all the right paths set, then:
May 21, 2010
by Mohan Cheema
0 comments
Renaming file name.old to name.new – To test things first, insert ‘echo’ between ‘do mv’ (below).
$ for i in *.input; do mv $i ${i/name\.old/name\.new}; done
Running application in loops on many input files
$ for i in *.input; do ./application $i; done
May 21, 2010
by Mohan Cheema
0 comments
Simple AWK programs enclosed in single quotes can be typed and executed right at the Unix prompt. For example, the program
awk ‘BEGIN { FS = “:” } { print $1 | “sort” }’ /etc/passwd
This program prints a sorted list of the login names of all users.
April 28, 2010
by Mohan Cheema
4 Comments
Introduction
In many cases using MRTG in a basic configuration to monitor the volume of network traffic to your server isn’t enough. You may also want to see graphs of CPU, disk, and memory usage. This chapter explains how to find the values you want to monitor in the SNMP MIB files and then how to use this information to configure MRTG.
April 28, 2010
by Mohan Cheema
0 comments
You can monitor your system’s Web performance quite easily with graphical Linux tools. You’ll learn how to use several in this chapter, including MRTG, which is based on SNMP and monitors raw network traffic, and Webalizer, which tracks Web site hits.