Score:0

Ubuntu

Connecting to sever through ssh

Newbie

1/29/23, 12:28 PM

I tried to connect to my sever through the ssh using ubuntu but it does not work.

 sudo apt-get install openssh-server openssh-client
[sudo] password for user:
Reading package lists... Done
Building dependency tree
Reading state information... Done
openssh-client is already the newest version (1:8.2p1-4ubuntu0.3).
openssh-client set to manually installed.
openssh-server is already the newest version (1:8.2p1-4ubuntu0.3).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
user@12122017-Dell:~$ ssh localhost
ssh: connect to host localhost port 22: Connection refused

I don't know what i am missing. What should i do? Please help me. Thank a lot

99

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server

ssh

openssh

schrodigerscatcuriosity

1/29/23, 12:32 PM

Welcome, the host must have the port 22 open. You can open ports with `ufw` (you have to install it).

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user68186

1/29/23, 12:35 PM

Does this answer your question? [Connect two computers with SSH in a home LAN](https://askubuntu.com/questions/1107987/connect-two-computers-with-ssh-in-a-home-lan)

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steeldriver

1/29/23, 12:38 PM

@schrodigerscatcuriosity UFW wouldn't block connections via the localhost interface AFAIK

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steeldriver

1/29/23, 12:42 PM

So the SSH server is installed - have you verified that it is actually running (`systemctl status ssh` or `service ssh status` for example) and listening on the default port 22 (`sudo netstat -nlpt | grep sshd`)

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David

1/29/23, 12:42 PM

A VPN will block local connections in some cases.

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schrodigerscatcuriosity

1/29/23, 12:49 PM

@steeldriver right! I commented in the general way, but OP's is trying with localhost then.

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Newbie

1/30/23, 7:25 AM

Thank you. So i have a remote server. Should i try it with my server to see how it's going?

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Newbie

1/30/23, 7:29 AM

I tried and here was the result. `user@12122017-Dell:~$ systemctl status ssh System has not been booted with systemd as init system (PID 1). Can't operate. Failed to connect to bus: Host is down user@12122017-Dell:~$ sudo systemctl start ssh [sudo] password for user: System has not been booted with systemd as init system (PID 1). Can't operate. Failed to connect to bus: Host is down` What should i do.

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user68186

1/30/23, 7:05 PM

It looks like `systemd` is not installed. Which version of Ubuntu are you using?

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CrazyTux

1/30/23, 7:44 PM

can you install `net-tools` by `sudo apt update` and `sudo apt install net-tools` then execute `netstat -tulpn4` and add the output to your question ? that should show if your computer is listening to `ssh` service. another thing that i missed up, are you trying to connect a server? can you be more specific about what pc you are using and what machine you are trying connect to ?

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Newbie

2/1/23, 1:26 PM

I did every thing and here is the result ```user@12122017-Dell:~$ netstat -tulpn4 (No info could be read for "-p": geteuid()=1000 but you should be root.) Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name``` I wanted to connect to a hosting sever which i rented, i got a shop on that sever but it is too laggy so i tried to connect through the ssh and install some cached on it to see how it's going. I am using a dell laptop. the processor ```Intel(R) Core(TM) i5-4200M CPU @ 2.50GHz 2.50 GHz```

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CrazyTux

2/1/23, 1:29 PM

have you installed the `open-ssh` program on your server as well? try to run the `netstat -tulpn4` on your server after installing `net-tools` on the server.

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Newbie

2/1/23, 3:10 PM

I tried the ssh mysever@IP sever and i got. ```ssh: connect to host IP port 22: Resource temporarily unavailable```. What does this mean and what should i do.

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Score:0

Ubuntu

Mark

1/29/23, 12:44 PM

As you have already tried, it's definitely worth trying ssh to your localhost, to see if it's listening locally:

ssh username@localhost

If this works but you can't get it from another computer, it's probably something with your network connection, including firewwall

In your case, this doesn't work so it's unlikely to be network connection or firewall.

Have you checked that the ssh service is running?

systemctl status ssh

It should say active. If it doesn't, try starting the ssh server:

sudo systemctl start ssh
# or - alternative - if not using systemd
sudo /etc/init.d/ssh start

A machine restart is also worth trying.

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Newbie

1/30/23, 7:27 AM

I tried and here was the result. `user@12122017-Dell:~$ systemctl status ssh System has not been booted with systemd as init system (PID 1). Can't operate. Failed to connect to bus: Host is down user@12122017-Dell:~$ sudo systemctl start ssh [sudo] password for user: System has not been booted with systemd as init system (PID 1). Can't operate. Failed to connect to bus: Host is down` What should i do.

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Mark

1/30/23, 7:10 PM

DId you try an internet search? https://linuxhandbook.com/system-has-not-been-booted-with-systemd/ `sudo service ssh start` if that doesn't work, try `sudo /etc/init.d/sshd start`

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Newbie

2/1/23, 1:22 PM

Thank you i will try it. Thank you a lot.

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Newbie

2/1/23, 1:28 PM

I tried and here is what i got ```user@12122017-Dell:~$ sudo service ssh start * Starting OpenBSD Secure Shell server sshd sshd: no hostkeys available -- exiting.``` What should i do

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Mark

2/1/23, 5:03 PM

Try an internet search. Maybe with the search term *sshd: no hostkeys available -- exiting.* I think you might be able to solve it...

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Newbie

2/1/23, 5:22 PM

Thank you i will try it.

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Ian Newson

3/24/23, 4:33 PM

And now this answer is the top result when searching for the 'no hostkeys error' :)

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Mark

3/24/23, 7:10 PM

Ok, so the irony is not lost on me!! The point I was trying to make is that the answer is already out there and I was trying to encourage a little bit of research rather than spoon feeding. However, it seems the situation has now changed if this is the top answer!

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Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Connecting to sever through ssh

TH: กำลังเชื่อมต่อกับเซิร์ฟเวอร์ผ่าน ssh

RO: Se conectează la server prin ssh

RU: Подключение к серверу через ssh

VI: Kết nối với máy chủ thông qua ssh

Connecting to sever through ssh

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