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Do I need to update Uboot (4 replies)

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I've got 4 pogo-plug mobiles. Getting ready to use them in a project. All have

U-Boot 2014.07-tld-1 (Jul 18 2014 - 00:59:45)

Linux-3.14.0-kirkwood-tld-1

installed. The installations are on very old, very slow 2GB SD cards & I want to move to larger, faster cards I made copy of the working good SD card with dd, then tried to "upgrade" the OS, found out the hard way not to do dist-upgrade.

No worries, it was copy. So now I'm dd'ing again. Understand that I want to avoid the dist-upgrade, just update my sources in apt, run "upgrade" (not dist-upgrade). Correct? & then if I want a newer kernel, download that here.

Questions:

instructions for a kernel upgrade are where?

Do I need to (should I) update uboot? I know it's an old version. If I don't really need to, then I won't since I don't anticipate using these things much longer (as RasbPi s are so cheap). But if I really should update uboot before spending the time to patch up the OS, this is the time to do it.

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