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2025-04-06 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Network Security >
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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
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