Unix command queues Implementations at and batch. Require a daemon. Standard POSIX tools. sudo apt install at on Debian/Ubuntu. nq. No daemon. Elegant. sudo apt install nq on Debian/Ubuntu. Pueue. Requires a daemon. Nice output. cargo install pueue with Rust. Task Spooler. No daemon. sudo apt install task-spooler on Debian/Ubuntu. See also “LPD for fun and MP3 playing”