Add apt page.

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+---
+tags:
+    - linux
+    - unix
+    - utils
+    - apt
+---
+
+# apt
+
+apt is a command-line tool for working with debian package manager. It stands
+for Advanced Packaging Tool(APT).
+
+## Working with APT examples
+
+```bash title="Install new package"
+$ apt install nvim
+```
+
+```bash title="Remove package"
+$ apt remove nvim
+```
+Adding the `--purge` option to `apt remove` will also removes the package configuration
+files.
+
+
+```bash title="Update the local package index"
+$ apt update
+```
+
+```bash title="Upgrade all packages in system"
+$ apt update
+$ apt upgrade
+```
+
+```bash title="Check apt cache size"
+$ du -sh /var/cache/apt/archives/partial
+```
+
+```bash title="Clean apt cache except blocking file"
+$ apt-get clean
+```
+
+```bash title="Clean apt cache, but it will remove only those packages, which can't be loaded from repositories."
+$ apt-get autoclean
+```
+