fgconsole - print the number of the active VT.
fgconsole [ --help | --version | --next-available ]
If the active Virtual Terminal is /dev/ttyN , then prints N on standard output.
If the console is a serial console, then "serial" is printed instead.
--next-available Will show the next unallocated virtual terminal. Normally 6 virtual terminals are allocated, with number 7 used for X; this will return "8" in this case.
Under devfs , the consoles are in /dev/vc/N . devfsd may maintain symlinks for compatibility.
chvt (1).