Upgrade Sailfish OS through CLI:

*You may want to upgrade the Sailfish Mobile OS through CLI if the main way through system settings fails to detect new releases. This is a common problem on Xperia Devices.
Before you begin, You need to enable developer options and set up an ssh server with password on your Sailfish os device.

1. Log into device by:
ssh defaultuser@192.168.0.18
## Your SSH password is needed here.

2. Get root by:
devel-su
## Your SSH password is also needed here.

3. Update to current release or another release by:
*Highly recommended to upgrade through each release one by one, or else risk major issues.;
ssu release 4.3.0.15
## Can get latest release & stop release history through Wikipedia.

4. Starts the process of downloading and upgrading to the target release through this command:
version --dup

5. reboot

Source | Date: March 28th 2022

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