Update cheatsheets

linux/alien

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# alien
+
+> Convert different installation packages to other formats.
+> See also: `debtap`, for `.deb` conversion on Arch Linux.
+> More information: <https://manned.org/alien>.
+
+- Convert a specific installation file to Debian format (`.deb` extension):
+
+`sudo alien --to-deb {{path/to/file}}`
+
+- Convert a specific installation file to Red Hat format (`.rpm` extension):
+
+`sudo alien --to-rpm {{path/to/file}}`
+
+- Convert a specific installation file to a Slackware installation file (`.tgz` extension):
+
+`sudo alien --to-tgz {{path/to/file}}`
+
+- Convert a specific installation file to Debian format and install on the system:
+
+`sudo alien --to-deb --install {{path/to/file}}`