• General Info.
• Reasons for CHMODING
• List of CHMOD's and what they mean.
General Info.
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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 a
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 on 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
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CHMODing files can be done for a variety of reasons. You can
CHMOD files to do things such as: mark them executable, give them
write permission, restrict access to them, and a variety of other
reasons. 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.
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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. I wonder if the 666
number is just a coincidence. Anybody can create havoc with your
files with this wide-open permission mask.
