chmod

Linux · Users and permissions · available in the simulator

What it does

Changes file or directory access permissions.

Syntax

chmod [opciones] modo archivo...

Options and parameters

-R
Changes files and directories recursively.
chmod -R 755 carpeta
u/g/o/a
Target: user, group, others, or all.
chmod u+x script.sh
+/-/=
Adds, removes, or sets exact permissions.
chmod go-w archivo.txt
r/w/x
Read / write / execute.
-v
Outputs a diagnostic for every file processed.
755
Octal notation: 4 read, 2 write, 1 execute, for owner, group, and others.
chmod 644 archivo.txt

Usage examples

chmod 755 script.sh
chmod +x script.sh
chmod -R u+w carpeta/
chmod o-r privado.txt
chmod 644 archivo.txt
chmod -R u+rwX,go+rX carpeta/
chmod -R 755 carpeta
chmod u+x script.sh
chmod go-w archivo.txt

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