Articles marked as Linux Commands center around the Linux command line, and using it to accomplish a particular task.
Linux Nightly believes that the command line is the most powerful feature of this operating system. In these guides, we’ll help you master essential Linux commands.
When using rsync over SSH for remote file transfers, you can avoid typing your password each time by setting up RSA key authentication. If this isn’t possible in your situation, the next best thing is to pass the SSH password in the rsync command. We’ll look at how to do that securely in this guide. …
If the computer you’re connecting to is running SSH on a different port than the standard (22), you’ll have to specify an extra option in your rsync command. This guide shows the correct syntax to use the rsync command on a different port than 22. The normal rsync-over-ssh command uses port 22 by default and …
find is an awesome Linux command that can come in handy all the time. It allows us to search for certain files, then execute a command (or commands) on all of those files. In this guide, we’ll show you a few ways that you can make your find command execute a lot more quickly. Check …
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Renaming multiple files on Linux sounds like a simple task, but it can get rather complex. It’s possible to bulk rename files with the mv command and a bit of Bash scripting, or use the mmv and rename utilities – which aren’t ordinarily installed by default. In this guide, we’ll show various examples for renaming …
It’s possible to supply a password in an SSH command with the sshpass utility on Linux. This guide will show how to install sshpass and then go over the correct command syntax for putting a password into the SSH command. As you might have guessed, putting your password in an SSH command is a bad …
This article will go over the step by step instructions for generating RSA keys on Linux and then transferring them to a remote system. Afterwards, you’ll be able to SSH to the remote machine without needing to enter a password. Using SSH with RSA keys is a lot more secure than entering a password. It’s …
The ps command in Linux is our best asset for listing running processes on a system. But do you know how to use it effectively? ps comes with a small learning curve, thanks to its varying syntax and plethora of (overlapping) options. In this guide, we’ll go over the most useful ps commands that Linux …
PNG files are losslessly compressed images. It’s a great format to use when you’re concerned about retaining all the quality of your image. Otherwise, opting for the JPG format can yield a better file size at the cost of some quality. PNG files take up quite a bit more storage space, but we can use …
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Images that contain Exif metadata may reveal when and where a photo was taken and with what device, among other things. While this is usually a desirable feature, it can also be a privacy concern if the images are going to be shared or published online. Exif data also helps inflate file size. In this …
Although JPG images already utilize lossy compression to reduce file size, this compression is rarely optimized. jpegoptim is a Linux command line utility that can optimize JPG photos, yielding a smaller file size and zero quality loss. The resulting image data is bit-for-bit the exact same as the original, but the files can enjoy a …
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