What does chmod 777 mean? Setting 777 permissions to a file or directory means that it will be readable, writable and executable by all users and may pose a huge security risk.
What does chmod 775 mean? The chmod 775 is an essential command that assigns read, write, and execute permission to a specific user, group, or others.
What does chmod 666 do? chmod 666 file/folder means that all users can read and write but cannot execute the file/folder; chmod 777 file/folder allows all actions for all users; chmod 744 file/folder allows only user (owner) to do all actions; group and other users are allowed only to read.
What does chmod 644 mean? Permissions of 644 mean that the owner of the file has read and write access, while the group members and other users on the system only have read access.