If you have ever tried to unmount a filesystem, USB stick, cdrom, etc… but found that it was busy and therefore could not be unmounted, you will like the fuser command. Fuser’s man page tells us that fuser will “Show…
From time to time, if you are a Linux Administrator, you will have to kill a linux process. The linux kernel has at least 32 signals. Amongst those 32, you may recognize some of the more common ones: SIGTERM, SIGHUP,…
What began as kind of a joke 15 years ago by Ted Kekatos, has steadily become an important office holiday. While he had no intention to create a lasting holiday, it happened anyway. Now systems geeks and nerds all across…
Built right into your command shell is a simple record of the commands that you have recently used. This command history can be quite useful as you try to figure out how you did something amazing or perhaps a mistake.…
As more and more systems move toward SSD disk, we are seeing much better swap performance as the disk IO is so much more performant. Additionally, as we move more and more of our systems to VPS cloud service providers…
Linux administrators will be very familiar with ssh as it is the most important connectivity tool providing you with shell access to your Linux system. In this article, we will secure your Sshd with Sshd_config Options. We have written other…