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Linux: Rename Expression To Remove First Character From a File Name

I‘ve over 1000’s of files starting with _ character as follows:


How do I remove the first character from a file name:


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Find command: Exclude or Ignore Files (e.g. Ignore All Hidden .dot Files )

How do I ignore all hidden .dot files while searching for files using the find command? How do I ignore or exclude certain files while running Linux or UNIX find command?
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Explain Usage Of The Linux Left Bracket /usr/bin/[ Command

Q. I see [ command in /usr/bin directory. What is the /usr/bin/[ command used for?
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