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Another useful command for the Linux Foundation Certified SysAdmin (LFCS) is the 'sed' Command. The initials stand for 'Streaming EDitor'.

The 'sed' Command is an editor that edits the file as a...
Sometimes on a network it is beneficial to know the Operating System (OS) of a machine. Accessing a system is easier when you know the OS because you can specifically search the Internet for known...
Many people may have a user account on their system which they may not know the password to log in. Other passwords may also exist which can be recovered.

This article will cover the use of...
When dealing with files and folders on a system or even going through the contents of a file you will need to understand ‘Regular Expression’. ‘Regular Expression’ are characters used to define a...
Since Fedora 26 Beta came out a few days ago, I decided it was a great time to throw it on my 13" MacBook Air.

This MacBook Air is a model number A1466 EMC 2925 which looks like a 2015ish model,...
You may have received a vulnerability report/scan stating that you need to fix 'HTTP Security Header Not Detected' on some web servers.

We'll mitigate three different things: X-Frame-options,...
Not all of us were able to attend osc17 in Nürnberg last month. If you missed it, you're in luck as a large amount of the talks are now online for you to watch.

There are 57 in total and they...
A lot of people who like to use their Linux system for gaming. There seems to be no shortage of gaming systems which can supply access to games. UALinux is a Ukrainian company which promotes the...
Bluetooth is a wireless technology mainly for close range. The technology is managed by the Bluetooth Special Interest Group (SIG).

Most devices have Bluetooth ability such as smart phones,...
If you have been following the NMAP articles I have written then you may have noticed something important about the scans. NMAP prefers to perform a Ping. A Ping to NMAP is a test to verify that...