Category : Linux Tutorials

Have you always wanted an easy way to see which packages you’ve manually installed on CentOS/RHEL using yum? Here are three solutions that might help you out – with screenshots. And also, a more permanent fix if you want it!

Sometimes installing software from source is unavoidable in Linux. Unfortunately, removing them isn’t so simple. In this tutorial, I’ll give you two solutions. First, the manual way in case you’ve already installed something and need to remove it. The second is a tool called “stow” that takes all the hassle out of installing from source in Linux, and allows you to remove packages completely with a single line.

Sometimes you’re forced to install software in Linux directly from the source code. This is usually packaged as a tar.gz file. Here’s how to install these packages and how to remove them if possible.

Everyone how to override the hiding of dot (.) “hidden” files in Linux using the “-a” parameter. A better solution is to use bash scripting so that even this solution won’t work. This tutorial will show you how to prevent files from ever showing up with the “ls” command.

Have you ever tried opening a large file of hundreds of MB or several GB in vi? It can take forever. And making edits is even longer. This is because vi loads the entire file into memory before displaying it to you. For large files, there are better and more efficient tools like “less” and “sed”. Here’s a tutorial on how to use them.

Here’s how to “hash” a file and compare it with what the sender of the file provides. This allows you to make sure that what you’re receiving is indeed what was sent. While MD5 has been shown to be insecure, we can use SHA256 instead.