How to stop linux in uboot

1) Hold escape key on boot up 2) Enter the command "editenv bootcmd" 3) Delete the content displayed in field 4) Enter the command "saveenv" 5) Reboot card

Enable linux

1) Hold escape key on boot up 2) Enter the command "editenv bootcmd" 3) Enter the command "run default_bootcmd" 4) Enter the command "saveenv" 5) Reboot card