How to Change the Hostname on Linux
On Linux, you can change the hostname by using the hostnamectl command. How to Set the Hostname on Linux For example: At this point, you… Read More »How to Change the Hostname on Linux
Linux
How to setup Certbot wildcard certificate on Apache
Certbot allows simple, quick and free provisioning of SSL certificates using LetsEncrypt. How to install Certbot Option 1 (recommended) Option 2 How to run Certbot… Read More »How to setup Certbot wildcard certificate on Apache
How to tell what the CHMOD value of a file/directory is
chmod alters the permissions for a file or directory, you could allow full read/write access to a file or directory by running the following command:… Read More »How to tell what the CHMOD value of a file/directory is
How to cleanup a /var/log/journal in Linux
You may find your /var/log/journal directory taking up a lot of disk-space. How do you go about removing, or deleting all these files without the… Read More »How to cleanup a /var/log/journal in Linux
How to find all files in a directory with extension
I needed to find all files in a directory on Linux that ended with the file extension .php. How to find all files in a… Read More »How to find all files in a directory with extension
Forensic Analysis on Linux (Unix)
Operating Systems come in a few competing choices, of which the major players are Apple’s MacOS, Microsoft’s Windows and then the various flavours of Linux,… Read More »Forensic Analysis on Linux (Unix)
Get the total size of all the files in a directory
It’s amazing how many times I’ve need to find out the total size of all the files in a directory on one of our servers.… Read More »Get the total size of all the files in a directory
How to debug an Apache 404 error
So you are getting an error 404 or perhaps even worse, a 500! The error in your Apache2 logs looks something like this: ***.162.245.*** -… Read More »How to debug an Apache 404 error
How to Change the Timezone on Ubuntu Server
If you’ve ever typed date into your Ubuntu Server and seen a different time or timezone appear than you expected, then it probably means that… Read More »How to Change the Timezone on Ubuntu Server
Remove Special Characters in a String using Bash
Programming languages provide the ability to remove special characters from a string quite easily. Sometimes you need to also do this from your command-line using… Read More »Remove Special Characters in a String using Bash
How to Follow Redirects with cURL for CLI or PHP
Let’s take a really common example. Say we want to follow redirects with cURL for google.com. It is common to curl follow redirect a URL.… Read More »How to Follow Redirects with cURL for CLI or PHP
How to use Docker to test any Linux distribution locally
I often need to test a specific Linux binary or make sure something works as expected from yum install or apt install. To do this,… Read More »How to use Docker to test any Linux distribution locally
How to monitor Network Traffic on Linux
There is a fantastic tool to see and monitor Bandwidth and Network Traffic on Linux. It’s called bmon and it works out of the box.… Read More »How to monitor Network Traffic on Linux
How to use Screen on Linux
Screen on Linux is a popular command-line program that lets you multiplex between interactive shells. What that means is, you can use screen to save… Read More »How to use Screen on Linux
Just SSH to my Jump Box!
I am a professional software engineer and do an absolute ton of devops work as well. I’ve actually never been hired into devops roles as… Read More »Just SSH to my Jump Box!
Speedtest on Ubuntu Server (commandline)
Using the speedtest-cli is easy and very useful. You run it as follows:
Windows 7 is better than Ubuntu 12.04 on desktop!
Today we have finalised for ourselves that Windows 7 is definitely a “better” operating system than Ubuntu 12.04 when it comes to desktop environments. Now,… Read More »Windows 7 is better than Ubuntu 12.04 on desktop!
How to Comment out a line in a Crontab on Linux
Firstly let’s just note that crontabs are read in the following way: Your current crontabs can be viewed on your linux setup by typing in… Read More »How to Comment out a line in a Crontab on Linux
Sudo install OpenGL & SDL on Ubuntu
A quick and easy way would be to type the following in one line with single spaces in the Terminal.This way of installing OpenGL and… Read More »Sudo install OpenGL & SDL on Ubuntu
Cube Desktop on Ubuntu
Alright, so I run Ubuntu 7.10 and use the Desktop Effects via compviz, anyhow, I could get the 2d workspace but really wanted the 3d… Read More »Cube Desktop on Ubuntu