UNIX man pages

Please help me if you can better explain the man pages:
CAT WC UNIQ LS CHDIR

I am fairly ok on the CHDIR and CAT but help on these and the others would be greatly appreciated!
cheesieAsked:
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Hal9kCommented:
Well, the man pages under Solaris and Linux are pretty obvious
and clear for these commands.
What Unix (Type and Version, e.g. Sun Solaris 2.5.1) do you use ?
And what Language (English, German, French, ...) ?
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adamolsonCommented:
hello.  

   wc:  this command is used to count the lines, words, etc., in a file.  (i.e.  to count the number of lines run "wc -l filename" and it will return the number of lines) wc -w returns the number of words and so on.  

   ls:   display files or directories (i.e. "ls /" will show you all the files and dir. in the root directory)  ls -l shows you more details.
 
   uniq:  used to display only one line and no duplicates from the input file.  (i.e. if the file test has two lines that are the same and you run uniq on it (uniq test) it will display just one line.

    does this help?  Adam
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