I have stopped ttyS0 (initctl stop serial DEV=ttyS0). The ttyS0 process stops for the session but reappears post to reboot, I want to disable ttyS0 at boot as it throws errors like:
Feb 19 20:19:42 sdm2 init: serial (ttyS0) main process (608881) terminated with status 1
Feb 19 20:19:42 sdm2 init: serial (ttyS0) main process ended, respawning
Feb 19 20:19:42 sdm2 init: initLogger main process (608986) terminated with status 1
I couldnt find any /etc/init/ttyS0.conf but serial.conf exists.
I searched for 'respawn' in an attempt to turn it OFF, but I found 'respawn' in serial.conf.
instance $DEV
respawn
pre-start exec /sbin/securetty $DEV
./init/serial.conf-33-exec /sbin/agetty /dev/$DEV $SPEED vt100-nav
Though /etc/ttyS0.conf doesnt exists,but I used 'echo manual | sudo tee /etc/init/ttyS0.override' to stop the ttyS0 at boot time.
-Also I removed ttyS0 from securetty.
-There is no mention of ttyS0 in inittab file.
-In grub.conf I have two console entries tty0 and console=ttyS0,115200 as well.
-/dev/ttyS0 exists but /etc/init/ttyS0.conf does nt.
Could anyone assist in stopping ttyS0 after reboot.