Shulou(Shulou.com)06/02 Report--

How does linux check if the ssh service is installed? In view of this problem, this article introduces the corresponding analysis and answers in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible way.

Execute on the terminal command line

Rpm-qa | grep "ssh"

Please see the following figure to show that it has been installed; in fact, it will be installed by default when installing the linux operating system.

Install the ssh service method:

1. Find the operating system image file, extract it, find the package related to ssh, and upload it to the server.

2. Execute the following installation command to install

Rpm-ivh rpm package name

3. If the image is mounted on the server, you can directly use the following command to install it.

Yum install ssh

Extended data:

SSH is an acronym for Secure Shell and was developed by IETF's network team (Network Working Group). SSH is a security protocol based on the application layer. SSH is currently a reliable protocol designed to provide security for remote login sessions and other network services. The use of SSH protocol can effectively prevent information leakage in the process of remote management. SSH was originally a program on the UNIX system, and then rapidly expanded to other operating platforms. When used correctly, SSH can make up for loopholes in the network. The SSH client is suitable for a variety of platforms. Almost all UNIX platforms-including HP-UX, Linux, AIX, Solaris, DigitalUNIX, Irix, and others-can run SSH.

Ssh has two levels:

The first level (password-based security authentication)

As long as you know your account number and password, you can log in to the remote host. All transmitted data will be encrypted, but there is no guarantee that the server you are connecting to is the server you want to connect to. There may be other servers pretending to be real servers, that is, being attacked by "middlemen".

The second level (key-based security authentication)

You need to rely on keys, that is, you must create a pair of keys for yourself and put the public keys on the server you need to access. If you want to connect to the SSH server, the client software will send a request to the server for security authentication with your key. After the server receives the request, look for your public key in your home directory on the server, and then compare it with the public key you sent.

The answer to the question about how to check whether the ssh service has been installed by linux is shared here. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel for more related knowledge.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.