How to install the SSH protocol software

The SSH protocol can effectively protect network security. So today we will introduce the SSH protocol software installation in Linux. Let's take a look at the main content in detail. The network is under attack, which is often caused by the Telnet service provided by the server. Indeed, for UNIX systems, to remotely manage them, you must use a remote terminal. To use a remote terminal, you must start the Telnet service on the server. However, the Telnet service has a fatal weakness-It transfers user names and passwords in plain text, so it is easy for others to steal passwords with ulterior motives. Currently, SSH is a useful tool to effectively replace the Telnet service. When the SSH client communicates with the server, the user name and password are encrypted to effectively prevent password eavesdropping. This article introduces the use of SSH server software packages running on common operating systems.

The SSH protocol software package consists of two parts: the server software package and the customer software package. For UNIX and Linux systems, these two packages are packaged separately in two different files. In Windows 9x/NT/2000, it is also divided into two parts, the difference is that the Server software package can only run in Windows NT and Windows 2000 Server versions, client SSH can run on all Windows systems. In addition, SSH is divided into two versions: SSH1 and SSH2. SSH1 is a completely free software package, and SSH2 is charged for commercial use. It is also known from its naming that SSH1 is the first version. It is not as powerful as SSH2, but is widely used in many websites because it is free of charge. SSH2 is compatible with SSH1 servers and provides good service support for SSH1 clients. Therefore, if SSH2 is installed in your system, there is no need to install the SSH1 package.

Install the SSH protocol software in UNIX/Linux

1. download the software package www.ssh.com and download the latest software package SSH2. It is best to download the source software package and compile it on your own.

2. Unzip and install:

# Tar-zxvf ssh2-2.4.0.tar.gz

# Cd ssh2-2.4.0

#./Configure

# Make

# Make install

Installation is complete. In this process, the server software package and the client software are installed together, so you do not have to install the client software package again.

Compiled Binary packages are stored in the ftp://ftp.ssh.com/pub/ssh/rpmdirectory in rpm format. It is a software package for non-commercial users, the package name is: ssh-2.4.0-1.i386.rpm, which contains support for X Window, another software package does not support X Window is ssh-2.4.0-1nox. i386.rpm, which can be directly installed after download. The installer installs the SSH protocol package under/usr/local/bin and/usr/local/sbin.