Update cheatsheets

linux/apt-key

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# apt-key
+
+> Key management utility for the APT Package Manager on Debian and Ubuntu.
+> Note: `apt-key` is now deprecated (except for the use of `apt-key del` in maintainer scripts).
+> More information: <https://manpages.debian.org/latest/apt/apt-key.8.html>.
+
+- List trusted keys:
+
+`apt-key list`
+
+- Add a key to the trusted keystore:
+
+`apt-key add {{public_key_file.asc}}`
+
+- Delete a key from the trusted keystore:
+
+`apt-key del {{key_id}}`
+
+- Add a remote key to the trusted keystore:
+
+`wget -qO - {{https://host.tld/filename.key}} | apt-key add -`
+
+- Add a key from keyserver with only key id:
+
+`apt-key adv --keyserver {{pgp.mit.edu}} --recv {{KEYID}}`