Cisco ASA stands for Cisco Adaptive Security Appliance.
Cisco ASA acts as both firewall and VPN device.
This article explains how to setup and configure high availability (failover) between two Cisco ASA devices.
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September 2011
Parted is a GNU utility, which is used to manipulate the hard disk partitions.
Using parted, you can add, delete, and edit partitions and the file systems located on those partitions. You can also clone partitions.
This article explains 9 practical parted command examples.
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Bash is the default shell on Linux. If you are spending lot of time on Linux environment, you should master the Bash command line features to become efficient.
Apart from being an interactive shell, Bash is also a scripting language, which allows you to automate your tasks using Bash shell scripting.
Bash 101 Hacks is a downloadable eBook that contains 101 practical examples on both Bash command line and shell scripting, and I promise it will help you understand everything you need to know about Bash.
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If you are a Linux sysadmin, you might not want others in your IT department, who has physical access to the server, change anything from the GRUB bootloader menu that is displayed during system startup.
GRUB is the 3rd stage in the Linux boot process that we discussed earlier.
GRUB security features allows you to set a password to the grub entries. Once you set a password, you cannot edit any grub entries, or pass arguments to the kernel from the grub command line without entering the password.
It is highly recommended to set GRUB password on any critical production systems as explained in this article.
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If you are running tomcat server that runs only on HTTP, follow the 2 easy steps mentioned below, to configure tomcat for SSL.
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htop is just like top, but on steroids.
Once you are used to htop, you’ll never go back to top again.
htop is a ncurses-based process viewer.
You can interact with the htop using mouse. You can scroll vertically to view the full process list, and scroll horizontally to view the full command line of the process.
This article explains 15 essential htop command examples.
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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