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Chmod Calculator
Convert Unix permissions to octal and symbolic notation.
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chmod permissions combine read, write and execute for owner, group and others.
The math behind it
Each digit adds read (4), write (2) and execute (1). 7 is rwx, 5 is r-x, 4 is r--.
Worked Example
755 means rwxr-xr-x.
Frequently Asked Questions
What is 644?
rw-r--r-- - owner can read/write, everyone else read-only.
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