apt-get and apt-cache ===================== These commands can be substituted by the newer, *apt*, command which uses these commands. Package Info ------------ In order to obtain information about a package which is available on your system you have to know the name of the package eg *mysql-server* not *mysql*. If we try with the wrong name or the correct name of a package but one which is not on our system: .. code-block:: console :caption: package does not exist steve@steve-Inspiron-3268:~$ apt-cache policy mysql N: Unable to locate package mysql Now for a package that does exist: .. code-block:: console :caption: package does exist steve@steve-Inspiron-3268:~$ apt-cache policy mysql-server mysql-server: Installed: (none) Candidate: 8.0.31-0ubuntu0.22.04.1 Version table: 8.0.31-0ubuntu0.22.04.1 500 500 http://gb.archive.ubuntu.com/ubuntu jammy-updates/main amd64 Packages 500 http://gb.archive.ubuntu.com/ubuntu jammy-updates/main i386 Packages 500 http://security.ubuntu.com/ubuntu jammy-security/main amd64 Packages 500 http://security.ubuntu.com/ubuntu jammy-security/main i386 Packages 8.0.28-0ubuntu4 500 500 http://gb.archive.ubuntu.com/ubuntu jammy/main amd64 Packages 500 http://gb.archive.ubuntu.com/ubuntu jammy/main i386 Packages