apx: add page (#9501)

pages/linux/apx.md

@@ -0,0 +1,33 @@
+# apx
+
+> Package management utility for Vanilla OS.
+> Install packages inside managed containers or directly inside the host.
+> More information: <https://github.com/Vanilla-OS/apx>.
+
+- Install a package in the system and initialize the container:
+
+`sudo apx install --sys {{package}} && apx init`
+
+- Install package(s) in the system or install AUR package(s) inside a container:
+
+`sudo apx install --{{sys|aur}} {{package1 package2 ...}}`
+
+- Run an installed package from AUR:
+
+`apx --aur run {{package}}`
+
+- Update the list of available packages in the system:
+
+`sudo apx --sys update`
+
+- Upgrade all installed packages in the system to their newest available version:
+
+`sudo apx --sys upgrade`
+
+- Remove package(s) in the system or from the AUR container:
+
+`sudo apx --{{sys|aur}} remove {{package1 package2 ...}}`
+
+- Enter the container to install packages using `apt` (Use `exit` inside the container to exit it):
+
+`apx enter`