TTY

PTY

A PTY is a pseudo TTY.

PTS

A PTS is the slave side of a PTY. You can often find these in the /dev/pts/ directory. VMs launched by libvirt/QEMU often have their consoles exposed here.

Relevant Links

• https://yakout.io/blog/terminal-under-the-hood/
• https://www.kernel.org/doc/html/v6.2/driver-api/tty/tty_buffer.html#id1
• https://www.kernel.org/doc/html/v6.2/driver-api/tty/tty_ldisc.html