1. Login to the server as root.
2. Execute the following command:
# visudo
Using Netstat Command
Netstat is a tool in the Linux which can be used to monitor network services. It dictates you about the processes that are using a port. Netstat displays all the ports in use and used by all of the processes, however, you can limit those to only a specific port simply by using the “grep” command.
Setting MaxClients in Apache/prefork MPM
- Determine how much RAM is available to Apache
- Determine how much RAM each Apache process uses
- Set MaxClients to: (RAM available to Apache) / (RAM per Apache process)
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Securing OpenSSH
OpenSSH (or Secure SHell) has become a de facto standard for remote access replacing the telnet protocol. However, a default installation of ssh isn’t perfect, and when running an ssh server there are a few simple steps that can dramatically harden an installation.
