KVM (Kernel-based Virtual Machine) is the virtualization solution supported on Ubuntu and other Linux distributions, it is added to mainstream Linux Kernel from version 2.6.20. QEmu is the complete KVM emulator.  Many cloud servers are running as virtual machines, its…

Samba is an open source software to provide windows file and print sharing on Linux server. Windows 10: Setup Tips Q: Windows 10 displays error message “\\samba\share is not accessible. You might not have permission to use this network resource….

At roundcube + dovecot, an error message “connection to storage server failed” is returned when users login their mailbox thru roundcube webmail, probably it is caused by limited numbers of connetion per user IP address. For dovecot imap service on…

We installed a Hongkong Post e-Cert (Server) on the Nginx web server of our client successfully. Hongkong Post provides a 9-digit PIN envelope reference number and a 16-digit e-Cert PIN password to our client. In this example, we assume that…

When we should redirect a website to a new web address (URL) in nginx, we may make use of Nginx rewrite insides the web site configuration block (ie. location { … }). There are few different types of HTTP redirects,…