How to find out the currently active linux virtual terminal while connected via ssh?
fgconsole is what you are looking for
http://linux.die.net/man/1/fgconsole
Alternatively, if you do not want to use sudo
to figure out what the current tty
is, you can use Linux-specific sysfs
entry:
$ cat /sys/class/tty/tty0/active
tty8