How to change and configure File Permissions (chmod 755 / 644)

Setting correct file permissions is essential for website security, PHP execution, and script functionality:

Recommended Standard Permissions:

• 755 (rwxr-xr-x): Standard for all directories, PHP executable scripts, and cgi-bin folders.
• 644 (rw-r--r--): Standard for HTML, CSS, JavaScript, images, and static document files.
• 400 or 440: Highly secure for configuration files containing database passwords (e.g., wp-config.php).

How to Change Permissions:

1. Via Plesk File Manager: Log into Plesk → go to Files → navigate to the file/folder → click the hamburger icon/properties next to the item → select Change Permissions → adjust read/write/execute permissions and click OK.
2. Via FTP Client (FileZilla / WinSCP): Connect via SFTP/FTP → right-click any file or folder → choose File permissions... (or chmod) → enter 755 for folders or 644 for files → click OK.