When an Open WRT firmware update is applied, it does not carry over/backup your custom changes automatically.The files/directories that you want to keep have to be explicitly defined in a config file.If you are using Windows then start Pu TTY and click Session on the left side, select SSH from the options, and then enter in the IP Address of your LEDE/Open WRT box into the Host Name field.Once you’ve done this just click on Open to start up the SSH connection.To find out what files will currently be retained after the upgrade, run the following command: Files that you might want to retain include your config directory and startup file.As always, it is advised to make a backup of your files/configuration before upgrading, even if you’ve marked all the files you want to keep.
First, consider the sections of the memory system (Figure 1) and parts of memory that should be updated while transferring software to a new version.
It’s also worth noting that you will need to redownload and install your custom installed packages once the upgrade is complete.
To determine which firmware version you are currently running you can run the following: This will display a file containing your current firmware version information.
Most of this article has to do with my use of that first router.
I played with the original WRT54G with DDWRT for a maximum of 15 minutes, then flashed Tomato to the drive, then imposed access controls. It was faster than the WRT54G Tomato router I have at home.
Firmware upgrades bring with them bug fixes, new features, and/or general improvements to the router functions.