< All Topics Main Running Scripts Understanding Permissions Print Understanding PermissionsFile permissions define who can read, write, and execute files such as scripts. When the installation instructions ask you to CHMOD a file, you are being asked to set file permissions. File permissions can by modified by most popular FTP clients or through the control panel’s built-in file-manager. Some common permission levels for files are: 600 Makes a file inaccessible 644 Readable by everyone (e.g. HTML documents) 666 File can be read and modified (e.g. for HTML files modified by scripts) 755 File can be read and executed by everyone (e.g. for scripts) 777 Writable and executable by everyone (not recommended) Most scripts need to be set to 755. Please refer to the script’s documentation for proper installation instructions.