What is the difference between apt and apt-get? - Ask Ubuntu The apt commands have been introduced to solve this problem apt consists some of the most widely used features from apt-get, apt-cache and apt-config leaving aside obscure and seldom used features
apt - How do I fix the GPG error NO_PUBKEY? - Ask Ubuntu sudo gpg -a --export <PUBKEY> | sudo apt-key add - sudo apt-get update Note that when you import a key like this using apt-key you are telling the system that you trust the key you're importing to sign software your system will be using Do not do this unless you're sure the key is really the key of the package distributor
What does sudo apt-get update do? - Ask Ubuntu In a nutshell, apt-get update doesn't actually install new versions of software Instead, it updates the package lists for upgrades for packages that need upgrading, as well as new packages that have just come to the repositories apt-get update downloads the package lists from the repositories and "updates" them to get information on the newest versions of packages and their dependencies It
What commands (exactly) should replace the deprecated apt-key? You need to know why apt-key add is deprecated All of the answers so far work around the symptom ("Don't use apt-key add ") but fail to address the actual problem that led to apt-key add being deprecated The problem is not a question of appending a key to one big keyring file etc apt trusted gpg vs manually putting single-key keyring files into the directory etc apt trusted gpg d These two
Unable to locate package while trying to install packages with APT . . . When apt-get install is unable to locate a package, the package you want to install couldn't be found within repositories that you have added (those in in etc apt sources list and under etc apt sources list d ) The following (general) procedure helps to solve this: Make sure you have enabled Ubuntu repositories:
How do I install a . deb file via the command line? - Ask Ubuntu With modern apt I would recommend doing sudo apt install package deb instead This allows automatically installing all the dependencies and it does all the extra sanity checks that dpkg will not implement because it's a low level command Note that without the prefix or some versions of apt may not understand that you're trying to refer to file name, not a package name from repository
What are phased updates, and why does Ubuntu use them? Updating via apt would ignore update phasing However, starting with Ubuntu 21 04, apt also uses phased updates, allowing phased updates to apply to all versions of Ubuntu, including Ubuntu Server and Ubuntu running in containers