objectives: 2_essential_tools

###Archive, compress, unpack and uncompress files:

Tool	Archive	Extract
tar (gzip)	`tar cfzv archive.tar.gz`	`tar xvf archive.tar.gz .`
tar (bzip)	`tar cfjv archive.tar.bz`	`tar xvf archive.tar.bz .`
star	`star -c -f=archive.tar dir/`	`star -x -f=archive.tar .`
gzip	`gzip file`	`gunzip file.gz`
bzip2	`bzip2 file`	`bunzip file.bz2`

####Create a test directory with 3 files, list, change ownership

mkdir test && touch test/{file1,file2,file3} - create some directories
ls -l test/ - list in long mode
chown -R nobody:wheel test/ - recursively change owner & group

####Changing Modes (octal & ugo)

chmod 0755 test/file1 - change mode to 0755 octal way
chmod u=rwx,g=rx,o=rx test/file{2,3} - change mode to 0755 ugo way
ls -l test/ - list changes to verify

####Set Special Permissions (files / directories)

chmod 1750 test/file1 - Sticky Bit
chmod 2750 test/file2 - Set GID
chmod 4750 test/file3 - Set UID