salut,
tu dois avoir dans ton /etc/inittab:
# The getties in multi user mode on consoles an serial lines.
#
# NOTE NOTE NOTE adjust this to your getty or you will not be
# able to login !!
#
# Note: for 'agetty' you use linespeed, line.
# for 'getty_ps' you use line, linespeed and also use 'gettydefs'
c1:1235:respawn:/sbin/agetty 38400 tty1 linux
c2:1235:respawn:/sbin/agetty 38400 tty2 linux
c3:1235:respawn:/sbin/agetty 38400 tty3 linux
c4:1235:respawn:/sbin/agetty 38400 tty4 linux
c5:1235:respawn:/sbin/agetty 38400 tty5 linux
c6:12345:respawn:/sbin/agetty 38400 tty6 linux
donc tu as forcement le tty6.
pour avoir les autres, il faut modifier les 1235 par 12345 ce qui donne:
# The getties in multi user mode on consoles an serial lines.
#
# NOTE NOTE NOTE adjust this to your getty or you will not be
# able to login !!
#
# Note: for 'agetty' you use linespeed, line.
# for 'getty_ps' you use line, linespeed and also use 'gettydefs'
c1:12345:respawn:/sbin/agetty 38400 tty1 linux
c2:12345:respawn:/sbin/agetty 38400 tty2 linux
c3:12345:respawn:/sbin/agetty 38400 tty3 linux
c4:12345:respawn:/sbin/agetty 38400 tty4 linux
c5:12345:respawn:/sbin/agetty 38400 tty5 linux
c6:12345:respawn:/sbin/agetty 38400 tty6 linux
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et la tu vas avoir les 6 consoles