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Permission Calculator

http://permissions-calculator.org/ is a nice web application, to calculate octal permissions for chmod.

  • The basic chmod command allows the change the access rights for user + group + others.
  • The numeric computation consists of 2^2=4, 2^1=2, 2^0=1 = rwx

The current permission scheme in numeric and symbolic values:

# Permission `rwx`
7 read, write and execute (4 + 2 + 1 = 7) `rwx`
6 read and write (4 + 2 = 6) `rw-`
5 read and execute (4 + 1 = 5) `r-x`
4 read only `r--`
3 write and execute `-wx`
2 write only `-w-`
1 execute only `--x`
0 none `---`