Student Organization Web Service
Unix File Permissions
Unix file permissions is a big topic to cover. In general, you need to know that the command to change your files' permissions is chmod, short for change mode.
A Brief Overview on File Permissions
0400 read by user
0200 write by user
0100 execute by user
0040 read by group
0020 write by group
0010 execute by group
0004 read by world
0002 write by world
0001 execute by world
By adding the permissions together, you will come up with the number that corresponds to the permission. For example, 400 + 200 + 100 + 40 + 20 + 10 + 4 + 2 + 1 = 777 which means read/write/execute by user/group/world.
For WAY more than a brief overview of unix file permissions please
visit the following Wikipedia pages:
http://en.wikipedia.org/wiki/File_system_permissions
http://en.wikipedia.org/wiki/Chmod