How to upgrade SONiC?

1. Copy the upgrade package to the USB flash disk, insert the USB flash disk into the device, and mount the USB flash disk to the /mnt/usb path.

sudo su               # switch to root user
mkdir /mnt/usb        # create file path
fdisk -l              # Check the identifier of USB flash drive. The following is an example which identifier is sdb1
mount /dev/sdb1 /mnt/usb       # Mount the USB flash drive to /mnt/usb

2. View the files/installation package in the USB flash disk

ls -l /mnt/usb

3. Copy the installation package from the USB flash disk to the /tmp path

scp /mnt/usb/M2-Broadcom_SONiC_xxx.bin /tmp

4. Execute the upgrade command

sonic-installer install /tmp/M2-Broadcom_SONiC_xxx.bin

5. Restart the device and load the new version

reboot

6. Log in to the device and check the version

sudo su
show version