To create and upload ZIP file: If you wish to submit ZIP files the procedure for Windows, Mac, or Linux is as follows:
To compress a folder, right-click the folder, select Send to .. then select Compressed (zipped) folder . A new ZIP file will appear in the same directory (folder) as the one you selected.
To compress a folder or group of files, right-click (control+click) on the folder or files and select Compress "...". A new ZIP file will appear on your computer in the same directory (folder) as the files you selected.
The 'zip' command is available from the command line in most Linux distributions. To compress, say, file1, file2, etc into a single file newfile.zip the usage is: zip newfile.zip file1 file2
or to compress a directory dir1 (which may have
subdirectories) into dir.zip it is:
zip -r dir.zip dir1
(where the option "-r" causes zip to descend recursively into the directory).