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General Info
When using a UNIX system it is sometimes necessary to change
file permissions. This is done using the CHMOD command. There are two different
ways to chmod a file. Certain FTP clients such as Cute FTP and WS/FTP Pro allow
for chmoding directly within FTP. To do this you would highlight the file that
you want to use, and select from the command menu "change file permissions."
There is an option for "manual." This is where you will enter the
desired CHMOD. Many other FTP clients will support CHMODing as well. We recommend
checking the documentation.
Reasons for CHMODING
CHMODing files can be done for many reasons. You can CHMOD
files in order to: mark them executable, give them write permission, restrict
access to them, or a variety of other things. It is important to note that chmoding
is nearly impossible to avoid. If you are trying to run a certain cgi script
it could require execute permissions on the script itself, write permissions
on a directory, and read on an informational page. Your cgi scripts should contain
the proper documentation to inform you of the proper CHMOD's.
List of CHMOD's and what they mean
chmod 777 filename: The file is available for Read,
Write, and Execute for the owner, group, and world.
chmod 755 filename: The file is available for Read, Write, and Execute
for the owner; and Read and Execute only for the group and world.
chmod 644 filename: The file is available for Read and Write for the owner,
and Read only for the group and world.
chmod 666 filename: The file is available for Read and Write for the owner,
group, and world. Many wonder if the 666 number is just a coincidence. Anybody
can create havoc with your files with this wide-open permission mask.
