![]() ![]() Especially a firmware compiled by yourself. Ubuntu doesn't by default enable serial console or serial port login capability however if you have added this it may have been done by adding an /etc/init/nf that you can alter or remove.Flashing routers with custom firmware if fun. To kill off login from the kernel serial console as well as any other serial devices, remove or comment with a leading '#' any lines that invoke the getty process from /etc/inittab. Many Linus distros use the sysvinit package which processes /etc/inittab for commands to spawn a getty on various serial devices or tty's. Yocto (and other Linux distros using the standard sysvinit) To kill off login from the kernel serial console as well as any other serial devices, remove or comment with a leading '#' any lines that invoke /bin/ash -login from /etc/inittab such as: While it is a complete re-implementation it still follows the standard of processing an /etc/inittab file for configuring what processes are spawned from init. Modern OpenWrt uses it's own procd as a replacement for the standard Linux init. While this is Linux distribution specific it usually involves the 'init' process launching the 'getty' or 'login' application with a parameter of a specific serial device or tty1 (which is the kernel console tty) In order to disable console login in a Linux OS you must disable the service that performs this function. Setenv bootargs 'root=/dev/mtdblock3 rootfstype=squashfs,jffs2 noinitrd init=/etc/preinit' CONFIG_SERIAL_8250_CONSOLE (Laguna / cns3xxx)Įxample bootloader configuration to remove the console bootarg:īootargs=console=ttyS0,115200 root=/dev/mtdblock3 rootfstype=squashfs,jffs2 noinitrd init=/etc/preinit.CONFIG_SERIAL_IMX_CONSOLE (Ventana / im圆).Remove the following from the kernel config (.config).In order to disable serial console for the Linux Kernel you can either recompile it with the support disabled, or you can alter the bootargs the bootloader passes to the kernel to disable it at runtime. alter config (configs/gwventana_defconfig):.set CONFIG_BOOTDELAY to 0 to save a couple of seconds on bootup.(include/configs/cavium_cns3000.h and/or include/configs/cavium_cns3000_spi.h): In order to disable serial console for the U-Boot bootloader you must re-build the bootloader with the feature disabled. Recovery would be through re-programming the board via the Gateworks JTAG Programmer. Please NOTE: There will be no way to access the board besides over the network after making these changes. This needs to be done in the following places: Yocto (and other Linux distros using the standard sysvinit)įor varying privacy and security reasons, some people like to completely silence the serial console output.Disable U-Boot bootloader serial console. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |