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The solution to the failure of putty to log in to the Ubuntu system

Shulou Source: shulou.com Published: 2022-06-01 07:26:30 10月03日 Update

Problem: I want to log in to Ubuntu with putty today, but I can't log in after entering the ip address and port number.

Reason: Ubuntu that wants to log in remotely does not have openssh-service installed

Solution: install openssh-service

Specific commands:

1. Installation

Ubuntu has openssh-client installed by default, so it will not be installed here. If your system is not installed, install it with apt-get.

Install ssh-server

Sudo apt-get install openssh-server

Install ssh-client

Sudo apt-get install openssh-client

two。 Confirm that sshserver is installed

Ps-e | grep sshd

450? 00:00:00 sshd

If you see sshd, it means ssh-server has been started.

If only ssh-agent indicates that ssh-server has not been started, you need to execute the command to start the ssh service:

/ etc/init.d/ssh start

Note: only sshd is displayed in the ubuntu-12.04-server-i386.iso installation:

3. Extended configuration

The default service port of SSH is 22, which you can define as another port, such as 222.The configuration file that needs to be modified is:

/ etc/ssh/sshd_config

Just change the Port parameter to 222in it.

Then restart the SSH service:

Sudo/etc/init.d/ssh restart