About : Anoop Nair

I am a Linux and Networking geek, Interest to learn more and fun to do new experiments, happy to share knowledge that I have learned and experienced in my life and carrier, also trying to learn more on Firewalls, Linux, Switching, Routing etc..............

Posts by Anoop Nair:

Enable SSH access in Cisco ASA 5510

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 [...]

[ More ] June 9th, 2010 | 2 Comments | Posted in Networking |

Server / Network Documentation with SYSID

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 [...]

[ More ] May 19th, 2010 | No Comments | Posted in Servers |

GlassFish Performance Tunning

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  [...]

[ More ] April 26th, 2010 | No Comments | Posted in Networking, Servers |

keytool IUI to manage SSL Certificate in Glassfish Web Server

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 [...]

[ More ] April 8th, 2010 | No Comments | Posted in Networking, Servers |

Use AWK to print column’s from file

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 [...]

[ More ] April 1st, 2010 | No Comments | Posted in Misc |

“alias” use it for a good reason

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 [...]

[ More ] March 24th, 2010 | No Comments | Posted in Misc |

Printing command from history without executing

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, [...]

[ More ] March 22nd, 2010 | No Comments | Posted in Misc |

Listing only active configuration from filename using grep

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.

[ More ] March 20th, 2010 | No Comments | Posted in Misc |