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If you have been working with Linux systems for quite some time, you already know how important it is to keep your filesystem structured. In some cases, you may need to create temporary directories with random names that need to be renamed later on. Renaming directories on Linux is not done with a dedicated renaming command but with a command that serves multiple purposes : the “mv” command. In this tutorial, we are going to learn how you can rename directories on Linux.

Git patch files are very beneficial : they are used in order to store differences that need to be applied to a file or a group of files on your system.

Git patch is historically linked to the Unix “patch” command that was used in early Unix versions to store differences between files or binaries.

In today’s tutorial, we are going to see how you can create Git patch files.

Before merging, you already know that you have to compare the differences between the two branches. Comparing two branches is very beneficial : it can be used as a quick way to see if you will have merging conflicts. It can also be commonly used in order to see the work that has been done : by comparing a feature branch with an integration branch for example. In this tutorial, we are going to see how you can compare two Git branches easily

As a Linux system administrator, inspecting log files is one of the most common tasks that you may have to perform. Linux logs are crucial : they store important information about some errors that may happen on your system. They might also store information about who’s trying to access your system, what a specific service is doing, or about a system crash that happened earlier. As a consequence, knowing how to locate, manipulate and parse log files is definitely a skill that you have to master.

When working with Git, it is quite common for developers to create tags in order to have reference points in your development. Tags are created in order to have references to release versions for example. Furthermore, tags are Git objects meaning that they can be checked out like you would check out a branch or a commit for example.

In this tutorial, we are going to explore all the ways of working with remote Linux systems. From X11, to SSH until XRDP, you will learn everything that there is to know about remote Linux system administration.

Developed by Ken Thompson in the early days of Unix, grep (globally search a regular expression and print) has been used for more than 45 years by system administrators all over the world. In this tutorial, we will focus on the grep command and how it can help us effectively find text in files all over our system.

When working with Git, you may want to include some specific changes into your current branch. You may want for example to introduce a specific commit located on another branch than your current branch. In order to perform this operation, you can use one useful git command : the git cherry-pick.

In this tutorial, we are going to focus on Linux package management using the APT package manager. First, we are going to go through a bit of history on the origins of Open Source Software in order to grasp the fundamentals of Linux packages. Later on, we will be focusing a bit more on APT (Advanced Package Tool) and we are to see how you can compile your own programs in order to have custom installations.

SSH, for Secure Shell, is a network protocol that is used in order to operate remote logins to distant machines within a local network or over Internet. In SSH architectures, you will typically find a SSH server that is used by SSH clients in order to perform remote commands or to manage distant machines. In this tutorial, we are going to see how you can install and enable SSH on CentOS 8 distributions.

As a system administrator, you may be asked to manage disks between different operating systems such as Windows, Linux and MacOS. As a consequence, you may have to format your disk partitions accordingly in order for them to be compatible across multiple environments. What filesystems should you use?

Linux has become a go-to operating system for much larger platforms, such as servers, supercomputers, and cloud computing, as well as the small, handy devices we keep on our persons at all times; smartphones.

There are loads of Linux books on the market today, covering a wide range of skill levels, many of which may not suit your unique situation. We’ve comprised this years top 10 best Linux books, sorted from beginner to expert...

When cloning a Git repository or creating new feature branches, you will have to set upstream branches in order to work properly. But what are upstream branches? Upstream branches are closely associated with remote branches. Upstream branches define the branch tracked on the remote repository by your local remote branch (also called the remote tracking branch)...

Every system administrator got this error at least one time in a shell : “bash : command not found“. However, you were pretty sure that you wrote the command correctly, or that you installed the tool that you are actually trying to execute. So why are you getting this error? The “bash : command not found” error can happen for various reasons when running commands in a Bash terminal...

As a system administrator, you always want to make sure that you have enough space for your hosts to run. Luckily for you, there are plenty of commands that you can use in order to check disk space on Linux. This tutorial discusses the ways to check disk space on Linux using the command line or graphical tools.

As a system administrator, creating partitions on Linux for your disks is a very common task. You may want for example to add some extra space to some directories on your filesystem, or you simply want to extend your existing filesystems because you expect them to grow. Luckily for us, there are many ways to create disk partitions on Linux using command line tools such as fdisk and parted or graphical tools like gparted.

On Linux, hidden files are files that are not directly displayed when performing a standard ls directory listing. Hidden files, also called dot files on Unix operating systems, are files used in order to execute some scripts or to store configuration about some services on your host. Some popular example of hidden files are the files contained in the user home directory : .bashrc that stores user initialization scripts or .bash_logout that is executed whenever you leave a bash session.

As a system administrator, you may be asked to set the system date on multiple servers. They may be configured badly or their timezones might not be configured properly. As a consequence, some of your programs may log invalid dates, leading to being unable to inspect some of your server logs for example. In this tutorial, we are going to see how you can properly set the date on Linux in order to match your current geographic timezone.

The screen command is a very common command used on Linux to launch and arrange multiple terminal shells within one single shell. Screen is most of the time used for two purposes: it can either be used in order to organize multiple shells and navigate between them easily. In this tutorial, we are going to have a complete overview of what the screen command on Linux is and how it can be used effectively.

As a system administrator, you are manipulating users and groups all the time. You may be required to create a new user account for a new member in your team for example. If your host grows, you may be also tempted to create groups in order to have a clearer understanding of the rights your assign to your system members.

As a consequence, having a perfect understanding of user administration is a very core skill for experienced administrators to master.