tar -cvf abc.tar dir1 file1 file2 other ...
c: create
v: verbose
f: format
tar -cvzf abc.tar.gz dir1 file1 file2 other ...
c: create
v: verbose
z: zip
f: format
tar -xvf abc.tar
tar -xvf abc.tar folder_in_tar file_in_tar ...
x: extract
tar -xvzf abc.tar
tar -xvzf abc.tar folder_in_tar file_in_tar