Where Is The Xorg.conf File Located under Unix / Linux / BSD?

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I want to find and edit my xorg.conf file for tweaking and configure it for new settings. The problem is that I’m unable to find the file. According to my research, xorg.conf should in /etc/X11 or /usr/X11R6/lib/X11/ directory. I found directories but not the file in directories. How do I find the xorg.conf under Unix or Linux like operating systems?

UNIX: Recursive Delete Directory / Files

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How do I delete (remove) a directory called $HOME/foo and its content including all files and sub-directories under Unix like operating systems? What is the best way to completely delete /tmp/foo/ with all it’s content?

HowTo: UNIX Set Date and Time Command

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I recently noticed that one of my UNIX servers was about 4 hours behind the correct time. I wanted to correct the date and time manually. How do I set date and/or time under UNIX operating systems using command line options?