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There are many articles about ssh server configuration, such as ssh service configuration under Linux. Here are only some common commands to view ssh service related information.

1 installation

Apt-get install openssh-server

2 after completion, check whether ssh server is started:

Ps-e | grep ssh

If there is only:

Ssh-agent

Indicates that server is not started

You can start it manually:

Sudo / etc/init.d/ssh start

Or restart ubuntu

3 you can now use putty to connect

Rpm-qa | grep ssh can see the ssh installation package in the system

Rpm-ql openssh-3.5p1-6 to view the installation information of the installation package (such as installation path, configuration files, etc.)

Ps-e | grep ssh to check whether the ssh service is running. If so, you can see something like the following:

2254? 00:00:00 sshd

This proves that ssh is already running, and the process is called sshd

If it is not running, you can run it with the following command:

Root] # / etc/rc.d/init.d/sshd start

Root] # service ssh start

Take a look at the network connection of this ssh service:

Root] # netstat-ntlp

If you see the following:

Tcp 0 0 0.0.0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 0

This means that sshd has been able to work properly, if the client (SecurCRT,putty, etc.) can not connect, try to turn off fire prevention

Try the wall: service iptables stop

The above article to view the linux ssh service information and running status method is the editor to share with you all the content, I hope to give you a reference, but also hope that you support more.

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