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chmod Command - Change File Permissions
The chmod command is used to change the access permissions of files and directories.
Syntax
chmod [options] mode file
Examples
chmod 755 file.sh
Set file.sh permissions to rwxr-xr-x.
chmod u+x script.sh
Add execute permission for the owner of script.sh.
chmod -R 644 /var/www/html
Recursively set permissions to rw-r--r-- for all files in /var/www/html.
Notes
- chmod can be used with symbolic or numeric modes to change permissions.
- Be careful when using recursive options as they affect all nested files and directories.
