![]() ![]() ![]() What does the “ &” do? The double-ampersand is an operator telling the bash terminal to first execute the command before the & operator and if that command was successfully executed without any errors, then go ahead and execute the command after the “&” operator.Īlso worth noting is that this double-ampersand is not specific to the apt command used here, we can use that with any bash commands! What is the difference between apt update and apt upgrade? “apt-get update” updates the package sources list to get the latest list of available packages in the repositories and “apt-get upgrade” updates all the packages presently installed in our Linux system to their latest versions. In this article, I have tried to explain what this command means from a beginner’s perspective avoiding unnecessary “technical terms” and I have tried to keep this article concise so that you can get through the entire article in about 10 to 20 mins max!įor those of you in a hurry here is the short version of the answer! The Short Version of the Answer Let’s see the difference between these 2 commands and what happens internally once you execute these commands. In plain English, update and upgrade have almost the same meanings, so it can get confusing for a beginner to understand what these commands actually do. I guess to beginners, it just feels like a magic spell to get something installed!Īs time went on, so many of my google searches led to using very similar patterns of “apt update” and “apt upgrade” commands to install stuff. I’ll be happy to help you out.I was just happy that I was able to type something in the Terminal and it actually worked! I did not pay much attention to what I actually typed in. If you have questions or difficulties in following the tutorial, feel free to drop a comment. This works with all the major Ubuntu releases like Ubutnu 12.04, 11.10, 11.04 and 10.10 etc. Now when you have the downloaded packages, you can install it on your target Ubuntu computer using the following command: sudo apt-offline install /path_to_downloaded_package_folder Once you have it downloaded it, copy the downloaded files in the USB key. sig file on a USB drive, connect it to an internet connected computer running on Ubuntu and use the following command in the terminal: apt-offline get -d /to_any_chosen_directroy /path_to/apt.sig sig file to a USB drive that could be connected to the computer that has internet access. This will generate the my.sig file in your home directory. Use the following commands in terminal: sudo apt-offline set ~/my.sig This “apt signature” contains the information about the downloaded and installed packages and thus it will help in determining which packages need to be downloaded on the other (lets say source) computer. The whole procedure can be categorized in 3 steps: 1. ![]() You need the “ apt-offline” to be installed on the target Ubuntu computer, which needs internet connection :( You can install it in the following manner: sudo apt-get install apt-offline How to use apt-offline to update Ubuntu offline: And to get you out of this situation Ubuntu has this wonderful tool called “apt-offline” that lets you update your Ubuntu powered computer without an internet connection. How will you update your Ubuntu OS then? This is one of the common situation faced by many in (specially) developing countries. If you use GUI, then the update manager regularly pops-up to notify you about the latest updates available.īut what if you are in a situation where you do not have internet access on your Ubuntu powered personal computer. All you have to do it type sudo apt-get update in the terminal. Updating or upgrading Ubuntu with internet connection is really very easy.
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