Using a Live USB for Linux recovery
Over the years I've managed to need recovery mode quite a few times. Most of those instances were self-inflicted and provided me with many learning...
Getting Started with SELinux
SELinux was developed by the NSA to provide a highly secure computing environment. True to the GPL, they have made this code available to the rest of the Linux community and it is included as part of nearly every mainstream distribution.
How to fix unresolvable file conflict errors upgrading or installing software RPMs
I install updates on a pretty regular basis and -- most of the time -- they install without a problem. By updates I mean installation...
My first sysadmin mistake
If you work in IT, you know that things never go completely as you think they will. At some point, you’ll hit an error, or...
btop — the top of my dreams
The top program is the original system monitoring and management tool for Unix and Linux. It performs its task well and with a minimum of...
How I reverted to Name Service Switch (NSS) for name resolution — And why
There are problems with the new systemd-resolved resolver and that gives us some good reasons to keep or revert to the NSSwitch resolver. The Domain...
Using the dmesg command
As a SysAdmin I frequently need to access the kernel log to obtain information of various types. This can range from searching for why a...
How to do updates on the command line
Keeping your Linux computer as safe as possible from various types of cyber attacks is only possible if you perform updates regularly and upgrade to...
Using htop to manage your Linux system
I use a lot of tools in my daily SysAdmin role. One of the most important ones in my toolkit is htop. The htop program...
Linux signals — sending system-level commands to programs
A user and SysAdmin guide Let's say you've got a program running that you want to terminate. Or that you want to power off or...
How I find and kill rogue programs
As useful and important as Firefox is to my ability to interact with the outside world, create on this website, manage my money, and much...
Managing processes with kill and killall
Process management can be an important part of system maintenance.
Another reason I like Linux
I like and prefer Linux for may reasons. Today provides one example. I like to install updates on all my Linux systems ( I don't...
sync — The command you never heard of
Have you ever heard of the sync command? Have you heard of it but then forgotten all about it -- like me? The sync command...
Essential steps for creating a USB boot drive for Linux
I usually keep a bootable Linux USB drive with me because I never know when I will need to use one to rescue a crashed...
How I reverted from firewalld to iptables — and why
First, let's get something straight. Linux has only one firewall. One. Netfilter is a part of the Linux kernel and it implements the logic contained...