Nmap doesn't have the standard 'contributing to nmap' page that most open souce programs have on their websites. I am convinced that is one of the major reasons people keep asking "How to Contribute?" on the mailing list.

Read the full thing at https://gyani.net/blog/getting-started-with-nmap/

Managing disk space has always been a significant task for sysadmins. Running out of disk space used to be the start of a long and complex series of tasks to increase the space available to a disk partition. It also required taking the system off-line. This usually involved installing a new hard drive, booting to recovery or single-user mode, creating a partition and a filesystem on the new hard drive, using temporary mount points to move the data from the too-small filesystem to the new, larger one, changing the content of the /etc/fstab file to reflect the correct device name for the new partition, and rebooting to remount the new filesystem on the correct mount point.

Read the full thing at https://opensource.com/business/16/9/linux-users-guide-lvm

Almost all developers have some sort of experience working with Secure Shell or SSH. It allows you to connect to a remote location and communicate securely. In this article, I'll share a couple of tips that will make working with SSH easier.

Read the full thing at http://botleg.com/stories/tricks-with-ssh/

Krita, KDE's answer to Photoshop and GIMP, comes with over 120 brushes.These brushes imitate media ranging from pens and pencils to water colors and acrylics, and textures from bristly to wet. However, if these are not enough, you can find dozens of additional brushes online, including ones designed for GIMP and some basic ones intended for PhotoShop.

Read the full thing at http://www.ocsmag.com/2015/07/23/loading-brushes-into-krita/

systemd is a suite of system management daemons, libraries, and utilities designed as a central management and configuration platform for the Linux computer operating system. Described by its authors as a "basic building block" for an operating system, systemd primarily aims t replace the Linux init system.

Read the full thing at http://n0where.net/understanding-systemd

Leader is an awesome idea. It allows for executing actions by key sequences instead of key combinations. Because I'm using it, I rarely need to press Ctrl-something combo to make things work

Read the full thing at http://sheerun.net/2014/03/21/how-to-boost-your-vim-productivity/

DNS is a distributed database that is capable of storing different types of data, not only IP addresses, in which the domain owner can publish various domain specific data. Yet, plain DNS does not offer any type of security measures. This means that DNS data in the response can be spoofed by anybody at any time.

Read the full thing at http://developerblog.redhat.com/2015/04/14/writing-an-application-that-supports-dnssec-in-rhel-and-fedora/

I still see a lot of people using tail -f to monitor files that are changing, mostly log files. If you are one of them, let me show you a better alternative: less +F

Read the full thing at http://www.brianstorti.com/stop-using-tail/

I am always tweaking and tricking my bash environment. I hit the same issues again and again and I always have to look up the solution, time after time. This happens until I get annoyed enough to sit down - okay, generally I am already sitting down but you get the point - and create a custom function, put it in my .bashrc and deploy it to any machine I log on to.

Read the full thing at https://developer.atlassian.com/blog/2015/02/ten-tips-for-wonderful-bash-productivity/

Command-line utilities like lsof, ps, and netstat may be basic, but they are surprisingly powerful. Many of us still love them and use them regularly.

Wouldn’t it be cool if these tools had Wireshark-like filtering capabilities and the ability to run on any given point in time, past or present – for example when an error happens or when a process exits?

Read the full thing at http://draios.com/ps-lsof-netstat-time-travel/