Disclaimer: this is very likely not safe, use it at your own risk, I don’t account for any harm.

I was playing with epoll and was curious whether I can use it to monitor sys.stdin. The biggest issue was that sys.stdin.read() is blocking and I had no way to figure out whether I read the descriptor fully or not (making the epoll useless pretty much). Until I changed it to non-blocking with fcntl.

Here are my assorted notes from some ${subject} talks.

Last week we were at Flock 2016 which was held in Krakow, Poland. Awesome event, lots of news, great people, plenty of conversations and fun.

Here is a list of my notes:

So I wanted to setup automatic mounting (read as autofs) with systemd, without using fstab.

Unfortunately, the man page didn’t have any examples so it wasn’t that easy to figure out. Luckily there is an excellent guide at RHCSA course [1].

Tl;dr

It’s really simple to copy your private GPG keys to another machine of yours. Let’s do public key first: $ gpg --export --armor KEY | ssh me@my-other-machine 'gpg --import' gpg: keyring `/home/me/.gnupg/secring.gpg' created gpg: keyring `/home/me/.gnupg/pubring.gpg' created gpg: /home/me/.gnupg/trustdb.gpg: trustdb created gpg: key 4937B925: public key "KEY" imported gpg: Total number processed: 1 gpg: imported: 1 (RSA: 1) It worked! Now the private: $ gpg --export-secret-key --armor KEY | ssh me@my-other-machine 'gpg --import --allow-secret-key-import' gpg: key 4937B925: secret key imported gpg: key 4937B925: "KEY" not changed gpg: Total number processed: 1 gpg: unchanged: 1 gpg: secret keys read: 1 gpg: secret keys imported: 1 (--armor is optional, it’s just for sake of checking the output first before piping it to ssh)…

It’s not that hard, here are a couple pain points:

• make sure that GOPATH is right — you want to compile against your checked out docker, not master docker