I was googling on how to boot an ISO in hard disk/USB disk, so that I can avoid the hectic CD/DVD burning process to test my favorite GNU/Linux distribution, but sadly I couldn’t find any straight forward method  to achieve this. I am blessed to attend  ILUG-cochin (Indian Libre User Group) meeting on 4th Sunday of January 2011, where I …

Once you are done with the basic configuration of Cisco ASA 5510, the next step is to enable SSH access from remote computers internally or externally, Steps involved in configuring SSH is as follows Firewall_5510#config t Firewall_5510(config)# enable password xxxxx(your password) Enable password is necessary to enable ssh access Firewall_5510(config)# username test password test123 User name and password for connecting …

Documentation is always tedious task for system administrators, especially there are 50’s and 100’s of servers. Recently I planned to document all my servers. After a long search I reached SYSID site, it is an open source, nice VB Script and python script for creating  decent looking documents,   It is very nice to document windows servers and desktops, The project …

GlassFish is an application/web server for deploying Java based web application. To obtain best performance in production environment, some modification has to be made to the default GlassFish installation. Tip 1:  Java Version Typically, many performance optimizations are always being incorporated in newer releases of Java SE.  Whenever possible, it is a good idea to upgrade to  the latest version …

To setup SSL in different java based web servers like Apache, Tomcat, Glassfish, we generally use the keytool command line to create certificate, generate CSR etc…,  which is a bit complicated and confusing if you are not well versed with the keytool command line, We can make our life much more easier, by using Keytool IUI which is GUI version …

In many times, we all may required an output of specific column in a file, for example we want to know the users in the system, for this we need to open passwd file in /etc folder and view, but the file is having so much of information, it is time consuming  to takeout user name, in that case we …

In Linux we all work with lots of log files, like mail, squid, application etc…., all these files located in its own folder, for example, if we want to look for squid access log to monitor the site access, generally we do tail -f /var/log/squid/access.log, this involves lots of typing, we can make this simple with alias command in linux …

We all know that, BASH stores the commands we entered in the terminal to .bash_history, we can see those commands using history command. Commands in the history can be executed by ! followed by the number,  !5 (5th command in the history will get executed). But what if we only need to print the command, instead of executing, we can …

Imagine a situation that  you want to see only the active configuration of squid.conf which is having 3532 line, to see the configuration you have to navigate through whole file from top to bottom, use this command to make your life easier.