The text editor vim, created on the basis of the older vi. It is one of the most powerful text editors with the full freedom for configuring and automation that are possible thanks to extensions and add-ins. By default, it is included in a scope of any Linux distribution.
Open a file using vi / vim:
This guide will cover the process of installing Postfix, Dovecot email agents on virtual servers running the Ubuntu 16.04 x64 operating system.
Postfix is an email transfer agent for sharing on the Internet and inside a local network. The advantage of Postfix is the ease of setup and configuration. Can be used to send system messages.
Dovecot is an IMAP and POP3 email receiving agent.
In Linux, process memory utilization is measured by two values, VSZ and RSS (both measured in bytes).
The overall speed of the network interface can be viewed using the command nload. If it is not available, it may be installed:
In Linux, CPU consumption, sorted by the greatest load, can be viewed using two commands: ps and top.
After increasing the server disc size of virtual server it is necessary to make it available for the operational system.
Open the ssh terminal under the root user and enter the following commands:
echo 1 > /sys/block/sda/device/rescanWith the help of utility «parted» see the full disc size and the divisions available: