apt: add page (#1205)

pages/linux/apt.md

@@ -0,0 +1,31 @@
+# apt
+
+> Package management utility for Debian based distributions.
+
+- Update list of packages and versions available. This should be run before running further apt commands:
+
+`apt update`
+
+- Search for packages:
+
+`apt search {{package}}`
+
+- Install a new package:
+
+`apt install {{package}}`
+
+- Remove a package (using "purge" instead also removes its configuration files):
+
+`apt remove {{package}}`
+
+- Upgrade installed packages to the newest available versions:
+
+`apt upgrade`
+
+- Remove no longer needed packages:
+
+`apt autoremove`
+
+- Upgrade installed packages and remove no longer needed packages:
+
+`apt full-upgrade`