Notes

I synchronise my .ssh/config file between (most of) my laptops, including some Linux and macOS ones. On Mac, it’s quite nice to be able to use the UseKeychain option to store SSH passphrases in the secure keychain thing. That is, until you try to use that same config file on Linux (or Windows/WSL) and it explodes. The issue is that UseKeychain isn’t actually part of standard OpenSSH; it’s a custom patch Apple adds to the version bundled with macOS. So when “upstream” OpenSSH (on Linux, Windows, or even Homebrew) sees it, it panics. ...

I was trying to build coreutils the other day and kept running into an error with docbooks. I’d initially figured out I was missing the docbook and docbook-xsl packages (fairly obvious given it said it couldn’t find it…), but having installed them, I then got this more cryptic error: failed to load external entity "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" Some searching and trawling through forum posts led me to try installing docbook-xml — this solved the problem. ...

This’ll be a short post, more for my own reference than anything else! When running sudo apt update, I got the following error: Err:8 https://dl.yarnpkg.com/debian stable InRelease The following signatures were invalid: EXPKEYSIG 23E7166788B63E1E Yarn Packaging <[email protected]> [...] W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://dl.yarnpkg.com/debian stable InRelease: The following signatures were invalid: EXPKEYSIG 23E7166788B63E1E Yarn Packaging <[email protected]> W: Failed to fetch https://dl.yarnpkg.com/debian/dists/stable/InRelease The following signatures were invalid: EXPKEYSIG 23E7166788B63E1E Yarn Packaging <[email protected]> W: Some index files failed to download. They have been ignored, or old ones used instead. Googling this returns a mixture of results and fixes, but the one I’ve found works the majority of the time is: sudo apt-key adv --refresh-keys --keyserver keyserver.ubuntu.com Running sudo apt update again then works — yay! 🎉