So I execute the find command in the picture, why there are so many permission denied? I am a root user. Just this problem.
closed as unclear what you're asking by Rui F Ribeiro, msp9011, Thomas, Christopher, αғsнιη Dec 29 '18 at 6:33
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/proc and also the
/sys exists only in memory and is virtual so you can't copy it!
These are pseudo−filesystems because they exist totally in memory; if you look at the disk partition when the system is not running, there will be only an empty directory which is used as a mount point.
So the error is absolutely normal!