This document explains how users can customize the Linux kernel boot parameters (bootargs) on Ubuntu for the Edge-2L.

You can add user-defined boot arguments by editing the file /boot/uEnv.txt.

The default contents of this file are similar to the following:

$ cat /boot/uEnv.txt 
#############################DO NOT TOUCH THIS OPTION#############################
rootdev=root=UUID=a92f7f2f-0d4a-4607-a45a-4549cfe71036
partitiontype=partition_type=generic
#############################DO NOT TOUCH THIS OPTION#############################
## Setup console
consoles=console=ttyS0,921600 console=tty0
 
## Setup FAN mode
fan_mode=auto
 
## Add user args here, spilt with space.
## e.g. Add bootargs 'test1=111 test2=222'
## boot_user_args=test1=111 test2=222
boot_user_args=

You can append your custom boot arguments to the boot_user_args= configuration variable.

Example: To add the bootargs cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory systemd.unified_cgroup_hierarchy=0, the line should look like this:

boot_user_args=cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory systemd.unified_cgroup_hierarchy=0

After rebooting, you can verify the active kernel command line by running:

$ cat /proc/cmdline