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I guess when restoring your system backup, you did not transfer ownership or permissions correctly.

You'd probably want to do something like:

sudo chown -R mynewuser ros_workspace

and maybe also

sudo chmod -R u+rwX ros_workspace

I guess when restoring your system backup, you did not transfer ownership or permissions correctly.

You'd probably want to do something like:

sudo chown -R mynewuser ros_workspace

and maybe also

sudo chmod -R u+rwX ros_workspace

Also, you should run make clean on each of the packages in the workspace or remove the build/ directories as cmake might have cached directories there.