I am confused about a three Documentation techniques used, I have The following questions concerning man , pinfo , /usr/share/doc
Does the man command Display the same content like pinfo and just the difference in the way they display information ? or they are totally different in content and the source directory it gets the documentation from ?
Does any of man or pinfo look in pinfo look in /usr/share/doc or it's just a third way for searching for information for installed packages