On computer filesystems, different files and directories have permissions that specify who and what can read, write, modify and access them. This is important because WordPress may need access to write to files in your wp-content directory to enable certain functions.
Since I started using WordPress (and more importantly developing for WordPress) I have been plagued by what seems to be a very common issue – allowing WordPress to simultaneously have internal writing permissions without breaking FTP. When using WordPress on a linux/*nix server combined with Parallels Plesk, you’re subject to dealing with not only Apache …
The basics of file ownership and permissions on Linux. Learn to understand who are the owners of a file or directory, how the file permissions work and how you can view them, and learn how to set basic file permissions yourself.
Q. How do I list or display the permission of a file using ssh? I don’t have GUI installed on a remote Linux computer.