I am trying to compress some files that are really seeming to take up a lot of space on my hard drive, but I can’t do without. Please note that I am using Lion.

Compact Pro archive, a common archiver used on Mac platforms until about Mac OS 7.5.x. Competed with StuffIt; now obsolete. DOS/Windows: Yes A high compression rate archive format originally for DOS..war WAR: Multiple Multiple. Windows, DOS, Linux. It supports Linux, Mac OS and Windows operating system.sit – It is also known as “Stuffit Archive”, it is a compression file that has been “stuffed” by Smith Micro Stuffit software. It is a common file compression format that uses Macintosh system. This means that the.

1. Thanks, the DMG option works great!
2. Well what compression format do you want the files to be in the end or how usable should the compressed files/storage be?
   The default and most viable option is to right-click (ctrl + click) the file and chose compress '...filename...' which will create a plain ZIP file. However if you ever want to use the zipped files again you will have to double-click and therefor expand them again.

   The second option would be to move all files you want to compress into a single folder. Then drag this folder onto the Disk Utility icon. A new window will popup which gives you some options to set. By default 'compressed' is already selected so all you have to do is enter a name for the Image and select where you want to store it. The result is a compressed Disk Image file (DMG). The benefit of this option is that this DMG file is usable! You open it via double-click and will be able to view,edit,add or delete files.

   Being a UNIX system you also have to option to create bzip/gz/tar/... files via Terminal or some third-party GUI.

   For other options I suggest to take a look at the following link (not all programs listed there are able to create compressed files).
   http://osx.iusethis.com/search?q=compression

Copying files between different linux, MacOSX or UNIX servers can be done with scp command. Thus you can use scp to transport data between CSC and your local environment or between different file systems at CSC.

The basic syntax for copying data from a local machine to a remote machine is:

And correspondingly the syntax to copy files from a remote machine to a local machine is:

For example user kkayttaj could copy the file data.txt from his/her local computer to his/her home directory in taito.csc.fi server with command:

In the command above, no path or file name is defined in the second argument. This means that the file will be copied to the users home directory with the same name as in the local machine (data.txt). If you would like to use other locations or file name, these values can be defined after the : sign. For example the following command would copy the file data.txt to a directory data_files (a sub directory in the CSC home directory) and name the copied file as data_a2.txt

To copy complete directories you should use scp command with option -r. For example the command below copies a directory data_dir and all its content to Taito. In this case a directory data_dir will be created to directory /wrk/kkayttaj. The content of the data_dir in Taito will be the same as in the local computer including all the subdirectories.

Directory /wrk/kkayttaj is the work directory of user kkayttaj.

Copying the data from CSC environment to local computer is done in the same way. If for example file data.txt locates in the home directory of user kkayttaj it can be copied to the local machine with command:

But if the file locates in the work directory it should be copied with command:

You can check the explicit locations of different directories by first logging in to a server in CSC and then giving command

In the commands above, files and directories have been copied one at a time. However, scp can copy several files at a time:

You can also use wild cards when defining the files to be copied. For example to copy all files with extension .txt in the current directory to Taito, you could use command

By default the copied files are treated as new files, but if you add option -p to the scp command, then the copied file will inherit the date and access mode information from the original file.