SSH keys allow authentication between two hosts without the need of a password. SSH key authentication uses two keys, a private key and a public key.
To generate the keys, from a terminal prompt enter:
How to stop / start / restart ssh on Ubuntu
How to install OpenSSH on Ubuntu
OpenSSH is a FREE version of the SSH connectivity tools that technical users of the Internet rely on. Users of telnet, rlogin, and ftp may not realize that their password is transmitted across the Internet unencrypted, but it is. OpenSSH encrypts all traffic (including passwords) to effectively eliminate eavesdropping, connection
How to flush iptables on Ubuntu
To see your current rules in iptables (IPv4), enter:
$ sudo iptables -L
To see your current rules in ip6tables (IPv6), enter:
How to stop and start ufw on Ubuntu
ufw command – This command is used for managing a Linux firewall and aims to provide an easy to use interface for the user.
Login as root.
Set auto responders in cPanel
1. Login to your cPanel interface.
2. Click on the “Mail” Button.
3. Click on “Auto-responders”.
Creating email domain forwarders
To set up the email domain forwarder follow this procedure:
1.
2. Login to your cPanel.
3. Go to Mail section.
Securing PHP through WHM
1. Log on to your WHM as root.
2. Go to Service Configuration section.
3. Click on PHP Configuration Editor
4. You can configure various PHP security and performance tweaks
DEFINITION of microprocessor
A microprocessor, sometimes called a logic chip, is a computer processor on a microchip.
The microprocessor contains all, or most of, the central processing unit (CPU) functions and is the “engine” that goes into motion when you turn your computer on. A microprocessor is designed to perform arithmetic and logic
DEFINITION of ESMTP
ESMTP (Extended Simple Mail Transfer Protocol) specifies extensions to the original protocol for sending e-mail that supports graphics, audio and video files, and text in various national languages. The original Internet protocols for sending e-mail are described in Request for Comments (RFC) 822, Standard for the Format of
