Update cheatsheets

gpgv

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# gpgv
+
+> Verify OpenPGP signatures.
+> More information: <https://www.gnupg.org/documentation/manuals/gnupg/gpgv.html>.
+
+- Verify a signed file:
+
+`gpgv {{path/to/file}}`
+
+- Verify a signed file using a detached signature:
+
+`gpgv {{path/to/signature}} {{path/to/file}}`
+
+- Add a file to the list of keyrings (a single exported key also counts as a keyring):
+
+`gpgv --keyring {{./alice.keyring}} {{path/to/signature}} {{path/to/file}}`