If you’ve installed nagios, and using it to monitor remote linux or windows server, you know that you can use the nagios web UI by going to the URL: http://{your-nagios-server-ip}/nagios/ Probably you’ve even defined appropriate nagios contacts, which will send a SMS messages to your cellphone about any critical issues. At work, when you are [...]
Ramesh Natarajan
Awk is a powerful language to manipulate and process text files. It is especially helpful when the lines in a text files are in a record format. i.e A record containing multiple fields separated by a delimiter. Even when the input file is not in a record format, you can still use awk to do [...]
Digital information is overwhelming. If you don’t simplify your digital life, it will take over your real life. This article contains 20 tips to simplify your digital life. Use only two email accounts. How many email accounts do you have? If the answer is greater than two, you have some work to do. You just [...]
Anytime Cisco releases a new IOS image for its network switch (or router), it is recommended that you upgrade it. This article explains 7 easy steps to upgrade IOS image on a cisco switch or router. Since you’ll be upgrading the IOS image, make sure you have physical access to the switch and you are [...]
TGS is 3 years old now. You have been a huge part of this blog’s growth, and I sincerely thank you for your support. Leave a comment with your birthday wishes to this blog. Last night I was sitting in the clubhouse in our community, and was outlining a draft for one of the future [...]
At a first glance, IPTables rules might look cryptic. In this article, I’ve given 25 practical IPTables rules that you can copy/paste and use it for your needs. These examples will act as a basic templates for you to tweak these rules to suite your specific requirement. For easy reference, all these 25 iptables rules [...]
Most organizations run Linux servers for their enterprise databases and applications. However the developers and admins might have Windows laptops. In those cases, you might be using PuTTY (or related tools like PuttyCM) to ssh from Windows to Linux. You might also want to transfer files from Windows to Linux and vice versa. You can [...]
OpenSSH options are controlled through the /etc/ssh/sshd_config file. This article explains the 7 default options in sshd_config file that you should change. In sshd_config, the lines that start with # are comments. For those options that uses the default values, the sshd_config file contains a commented line with the option and its default value. This [...]