tools in a terminal window
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unix:
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# - comments are preceeded by '#' sign
# - this is a comment

cd                            (change directories to home)
cd dirname                    (change directories to dirname)
ls                            (show directory listing)
ls -ltr                       (show long directory listing, new last)
mv A B                        (renames A to B (if file) or into dir)
pwd                           (print (current) working directory

less filename                 (page through)
grep string filename          (grab all lines in filename with 'string')

tar cvzf name.tar.tz dir      (put entire "dir" into a tarball "name.tar.gz")
tar xvzf name.tar.tz          (extract entire  tarball here)

zip -ry name.zip dir          (put entire "dir" into a zip file "name.zip")
unzip name.zip                (extract entire  tarball here)


emacs filename                (open filename with editor emacs)