/dev: console core -> /proc/kcore fd -> /proc/self/fd full log mqueue null ptmx pts random shm stderr -> /proc/self/fd/2 stdin -> /proc/self/fd/0 stdout -> /proc/self/fd/1 tty tty1 tty2 urandom zero /dev/mqueue: /dev/pts: 0 1 2 ptmx /dev/shm: