http://www.scrye.com/~kevin/lsh/feb-...O-5.html#umask
http://www.washington.edu/computing/...rmissions.html
كود:
A variable called `umask' is used as a permission mask for all newly created files and directories. Umask is a 3 digit octal number. The default umask is 022 = 010 010 000 binary. The two one bits prevent "group" and "other" write permission. So, a newly created file will have rwx permission for the owner, and rx permission for group and others. A umask of 077 = 111 111 000 would cause new files to have no permissions set for group and others. In order to use a umask other than the default, you should include the line `umask num' (where num is an octal number) in your .cshrc file. For more about umask, enter
man umask