why i can't install a new plugin on my wordpress?
I can connect my vps ip with putty ,hostname is a.b.c.d , ftp user is root ,password is password .
None of connection type (ftp or ftps) can add a new plugin .
Failed to connect to FTP Server
To perform the requested action, WordPress needs to access your web server. Please enter your FTP credentials to proceed. If you do not remember your credentials, you should contact your web host.