Perform test whether a number is a prime using command-line factor utility.
Build your first VServer on Debian Wheezy using psand.net public repository.
It is a matter of personal preference whether you use current or former network device naming convention. I am more accustomed to the latter and will configure operating system to retain the old behavior.
lxd is a real pleasure to use, but mdadm constantly segmentation faults inside Ubuntu guest operating system. This issue affects only Ubuntu as mdadm is not disabled by default inside these containers. It is nothing scary or dangerous, but in this specific case, repetitive segfaults needlessly raise alertness level.
It is very common to display and store command output using tee utility, but taking full advantage of it requires applying slightly different error catching strategy.
ifconfig is not installed by default in Debian Stretch. However, it is available in package repositoriy, so applications that depends on it can still be used.
Create a simple shell script that will read user message as parameter or directly from standard input when used in pipeline.
Recently I stumbled upon the missing firmware for Broadcom Tigon3 based gigabit Ethernet card after kernel upgrade process. Simple problem, which was solved by installing firmware-linux-nonfree Binary firmware for various drivers in the Linux kernel package.
Today, I will show you how to stop referral spam using simple nginx directives to return 403 Forbidden HTTP status code after encountering troublesome referer hostnames.