Apache does not have mod_rewrite enabled by default so for you need to install rewrite module in Apache server using below command,

OpenSSL is an open source project that provides a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security and Secure Sockets Layer protocols.

Installation of the OpenSSH client and server applications is simple. If you want to install OpenSSH server application, and related support files it the Correct way,

Swap is space on a disk that is reserved to be used as virtual memory. A swap partition is not present on Cloud Servers by default, but swap can be added to a server by allocating a swap file.

Ping is a program used to detect a host's reachability on a network. Probably it's executing from the command line followed by hostname or IP address...

The below error showed on terminal while trying to configures keealived with Net-SNMP on Ubuntu box. configure error: Popt libraries is required,

I got the below error while trying to configure keealived with Net-SNMP on Ubuntu box. Just when I was searched on Google got some information to be install or update some packages.