Uninstalling & Reinstalling Apache2 On Ubuntu 22.04

To uninstall Apache2 on Ubuntu 22.04

$ sudo apt-get purge apache2

Reinstall Apache2 on Ubuntu 22.04

$ sudo apt-get install apache2

Make sure that Apache2 has been correctly installed and is working

$ systemctl status apache2.service

Clear The Node Repl or Console

Node JS is a JavaScript server-side runtime. It can read and write to disk, process text streams and more. Node also includes its own package manager, npm (Node Package Manager), which makes it easy for developers to install third party modules that extend the functionality of their application or provide additional features without managing dependencies manually.

“how to clear screen in node js command prompt” is a question that has been asked many times before. The answer is as follows: “To clear the console, use Ctrl+L.”


LS Command ::: How to list files and directories with directories first

Got GNU?

The gnu version of ls has --group-directories-first. And cp has -t.


On systems that don’t have gnu’s ls, your best bet is two successive calls to find with -maxdepth n/-mindepth n and -type t with the appropriate options.

find . -maxdepth 1 -mindepth 1 -type d
find . -maxdepth 1 -mindepth 1 \! -type d

For copying files, with the target first, you would have to write a script that saves the first argument, then uses shift, and appends the argument to the end.

cp -r -- "$@" "$target"


How Do I Update Linux Software On Ubuntu From Command Line?

Use this:

sudo apt update        <span class="hljs-comment"># Fetches the list of available updates</span>
sudo apt upgrade       <span class="hljs-comment"># Installs some updates; does not remove packages</span>
sudo apt full-upgrade  <span class="hljs-comment"># Installs updates; may also remove some packages, if needed</span>
sudo apt autoremove    <span class="hljs-comment"># Removes any old packages that are no longer needed</span>

Documentation about each apt option can be found in the the manpages for apt. These are also available by running man apt in your terminal.

Use of both upgrade and full-upgrade together is usually not needed, but it may help in some cases: see Debian documentation about Upgrades from Debian 9.