tty device driver

• /dev/tty*: TTY stands of teletype, see wiki Teleprinter

• /dev/ttyS*: TTY over serial, new version

• /dev/hvc*: hypervisor console, usually in virtualization env

• /dev/pts*: pseudoterminal, this is ssh or virtual emulator.

example

ttyS

hvc

im in HVC

pts

im on ssh