This is just the tip of the iceberg for what apt-key does. I have seen some small PPA’s get compromised and people fall for it because they didn’t add one these keys. This is extremely useful for PPA’s and other third-party applications should you add them in Debian or Ubuntu. Once you add a key like this, you know whether your package came from where it said it did. This key is important because it tells us whether the repository we’re about to use is the one we have added. We are telling Bash or whatever shell we’re using to add from stdin at the – mark. We use the | symbol (called “pipe”) in order to pipe our output from wget to apt-key. There are also things like stderr which are the standard output for errors and other various levels of output. stdout is the standard output and can be piped into other commands. It dumps the whole thing to the console through stdout. What this means, is that if you ran: wget -qO.
#VIVALDI BROWSER UBUNTU DOWNLOAD#
Here, all it does is quietly download the file and output it to stdout. Wget is a command line utility to download a file or files from a given source. The first command we run looks a little daunting. Let’s go deeper in with the first two commands.
#VIVALDI BROWSER UBUNTU INSTALL#
sudo add-apt-repository 'deb stable main'įinally, we want to run apt update: sudo apt updateĪnd then apt install: sudo apt install vivaldi-stable You then want to add the repository using add-apt-repository. The first command in the guide has us download the public key and load it into apt with apt-key as follows: wget -qO- | sudo apt-key add. Most third-party repositories will have a very similar guide or workflow. Let’s look at the specific process for Vivaldi at a glance. This document uses Vivaldi as an example, but the techniques and information here are applicable to most third-party repositories on Ubuntu or Debian. Please note, if you just want to install Vivaldi and don’t care about the commands used, see their guide here. Read my tutorial on apt to get up to speed. The installation process is pretty easy and their guide is straightforward, but let’s learn what it all means and why we’re running what we’re running and how it applies to other third-party repositories. This browser is awesome so I decided to try it out on pretty much everything. I wrote a review about the Vivaldi browser previously.
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