Linux Permissions

Change file or directory permissions in Linux using numbers (three digits):

# chmod 777 /MyFolder

This method uses arithmetic, where it adds up the values of each permission to produce a final result composed of three digits:

u user g group o other
r read = 4
w write = 2
x execute = 1
4+2+1 = 7 4+2 = 6 4
  • to give permissions rwxrw-r– use the following command:
# chmod 764 /MyFolder

Note: Linux chmod will interpret any numeric argument as octal, hence no leading zero is necessary.

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