linux console disable on runtime

런타임으로 콘솔을 끄는건 메시지만 출력하지 않는 것 같고..

kernel argument로 주어진 포트를 close 하는 건 다시 찾아 봐야 할 듯..

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이건 딱히 다른 티가 안나고..

uart로 콘솔 연결해 보기 전에는 모르겠네...

$ sudo dmesg -n 1

[링크 : http://askubuntu.com...how-do-i-disable-messages-or-logging-from-printing-on-the-console-virtual-termin]

얘는 에러가 나네...

$ sudo sysctl disable serial-getty@ttySAC1.service sysctl: cannot stat /proc/sys/disable: No such file or directory sysctl: cannot stat /proc/sys/serial-getty@ttySAC1/service: No such file or directory $ ll /proc/sys total 0 dr-xr-xr-x   1 root root 0 ene  1  2000 ./ dr-xr-xr-x 150 root root 0 ene  1  1970 ../ dr-xr-xr-x   1 root root 0 oct 12 00:57 debug/ dr-xr-xr-x   1 root root 0 oct 12 00:57 dev/ dr-xr-xr-x   1 root root 0 ene  1  2000 fs/ dr-xr-xr-x   1 root root 0 ene  1  2000 kernel/ dr-xr-xr-x   1 root root 0 ene  1  2000 net/ dr-xr-xr-x   1 root root 0 ene  1  2000 vm/

# systemctl disable serial-getty@ttyS0.service

[링크 : http://developer.toradex.com/knowledge-base/how-to-disable-enable-debug-messages-in-linux]

$ sudo vi /etc/sysctl.conf kernel.printk = 0 4 1 7

[링크 : https://wiki.openwrt.org/doc/recipes/terminate.console.on.serial]

# sysctl -w kernel.printk="2 4 1 7" kernel.printk = 2 4 1 7 # sysctl kernel.printk kernel.printk = 2       4       1       7

$ sysctl kernel.printk kernel.printk = 1       4       1       7

[링크 : http://superuser.com/questions/351387/how-to-stop-kernel-messages-from-flooding-my-console]

inittab이나 grub 로더를 통해서 하는건데odroid에는 inittab이 존재하지 않는다.

[링크 : https://help.ubuntu.com/community/SerialConsoleHowto]

[링크 : https://linux.die.net/man/8/change_console]