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Unix sockets — processes talking through a file

cheat sheet · Ubuntu 24.04 · iproute2 6.1 · nginx 1.24 https://lab.dimsanych.ru/en/wiki/unix-sockets/

Cheat sheet

ls -l /run/app/app.sock s as the first letter — a socket
stat -c '%F %a %U:%G' /run/app/app.sock type, mode, owner
ss -xl listening unix sockets
sudo ss -xlp | grep app.sock which process listens
sudo find /run -type s sockets under /run
curl --unix-socket /run/app/app.sock http://localhost/ HTTP over it
nc -U /run/app/app.sock a raw connection
sudo chgrp www-data /run/app/app.sock access for nginx's group
sudo chmod 660 /run/app/app.sock