man fgconsole (Commandes) - print the number of the active VT.
NAME
fgconsole - print the number of the active VT.
SYNOPSIS
fgconsole [--help|--version|--next-available]
DESCRIPTION
If the active VT 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.