$ cd project_name/
$ touch new_file
$ cvs add new_file
cvs add: scheduling file `new_file' for addition
cvs add: use `cvs commit' to add this file permanently
		

if the file is binary

cvs add -kb new_file.gif

add a directory

$ mkdir dir1
$ mkdir dir2
$ touch dir1/file1
$ touch dir2/file1
$ touch dir2/file2
$ cvs add dir1
? dir1/file1
Directory /home/cvsroot/project_name/dir1 added to the repository
$ cvs add dir2
? dir2/file1
? dir2/file2
Directory /home/cvsroot/project_name/dir2 added to the repository
		

add mulit files

$ cvs add dir1/file1
$ cvs add dir2/file?