OpenSSH (OpenBSD Secure Shell) is a set of computer programs providing encrypted communication sessions over a computer network using the SSH protocol.

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50
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ssh: automatically accept keys

I've written this small utility script: for h in $SERVER_LIST; do ssh $h "uptime"; done When a new server is added to $SERVER_LIST, the script is stopped with: The authenticity of host ...
45
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3answers
44k views

Does ssh key need to be named id_rsa?

I have come across this problem a couple of times when creating build servers with keyed authentication. I was wondering if anyone else has experience this. I have a couple of keys for my current ...
34
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10answers
293k views

How to solve 'Connection refused' errors in SSH connection?

I have an Ubuntu Server 10.10 32-bit in my home. I'm making SSH connections to it from my PC via Putty. The problem is, sometimes I'm able to login seamlessly. However, sometimes it gives me an error ...
19
votes
5answers
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passwordless ssh not working

I've tried to setup a password-less ssh b/w A to B and B to A as well. Generated the public and private key using ssh-keygen -trsa on both the machines. Used the ssh-copy-id utility to copy the ...
18
votes
3answers
41k views

What does 'without password' mean in sshd_config file?

I just installed Ubuntu 14.04 on my server and I was setting up all my config files when I came across this in my sshd_config file: # Authentication: LoginGraceTime 120 PermitRootLogin ...
16
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2answers
57k views

Connecting to ubuntu server via ssh externally

I have recently installed ubuntu server (12.0.4) and intend to use it primarily as a file server. I am completely new to linux so this is a pretty big learning curve. Yesterday I was able to ...
13
votes
3answers
73k views

How to set up remote desktop sharing through SSH?

Is there a way to view (and control) a remote desktop through SSH? I will not have physical access to the remote host machine.
13
votes
3answers
75k views

How to setup a restricted SFTP server on Ubuntu?

I would like to know how to set up root, sudo, sftp-only user accounts which won't be required public key authentication at log in. I would also like to know how to set up sftp-only users' home ...
13
votes
1answer
11k views

Host alias for ssh

There are a few SSH destinations I will frequently be connecting to and I'm wondering if rather than remember the IP address I can create a host alias for them. I'd like to be able to use... ssh -p ...
12
votes
2answers
11k views

openssh server: rejected send message

When I tried to restart the ssh server on my ubuntu box, I got me@me-one:~$ service ssh restart restart: Rejected send message, 1 matched rules; type="method_call", sender=":1.63" (uid=1000 pid=3354 ...
12
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1answer
12k views

I am getting a Putty attempted incorrect protocol errors when I SSH into my server from Windows

I have had Putty connecting via SSH to my Ubuntu 12.10 server for several months. Yesterday I began to get the following error every time I connect: PuTTY X11 proxy: wrong authentication protocol ...
11
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2answers
8k views

How can I reconnect to a ssh session after a broken pipe?

So I was running apt-get upgrade on a server when the router decided it had been too long since it last made me angry: It dropped all connection. Moral of the story is to use screen a lot when you're ...
9
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3answers
5k views

How to enter the Default Keyring password via the command line?

Is there a way to enter the default keyring password using the command line? For instance: You have a remote setup of Ubuntu 10.10 thats set to auto login. You don't want to remove the keyring ...
8
votes
1answer
293 views

How do I re-issue OpenSSL snakeoil cert?

In light of the recent heartbleed fiasco and whatnot I too have been scrambling to up security on some servers. My question is how do I reissue the Snakeoil cert that comes with Openssl? The cert ...
8
votes
1answer
7k views

Bizarre SSH Problem - It won't even start

I recently got Ubuntu 12.04 Precise, got it up and running with some MediaWiki software, static IP on the box and router and was able to access the main page even from a cell phone. Everything seemed ...
8
votes
1answer
8k views

NX/SSH remote access with Remmina

After many days and a lot of frustration, I managed to get freenx to work on my home server. I can connect to it with nomachine's linux client, but I want to use Remmina for this purpose. The problem ...
7
votes
4answers
46k views

SSH error: Permission denied, please try again

I am new to ubuntu. Hence please forgive me if the question is too simple. I have a ubuntu server setup using amazon ec2 instance. I need to connect my desktop (which is also a ubuntu machine) to the ...
7
votes
3answers
78k views

SSH Connection Error: No route to host

There are three machines in this scenario: Desktop A : user@1.23.x.x Laptop A : user@1.23.y.y Machine B : user@192.168.z.z All the machines have Ubuntu 11.04 (Desktop A is a 64bit one) and have ...
7
votes
2answers
40k views

How to solve: “Connect to host some_hostname port 22: Connection timed out”?

I have two Ubuntu machines. Both have openssh-client and openssh-server installed on them. ssh-ing from machine G (fresh Ubuntu 11.10 installation) to machine K works great. But ssh-ing from machine K ...
6
votes
3answers
157 views

Difference between Software Selection Servers

I am installing Ubuntu Server, and I want to know what is the difference between these: [ ] OpenSSH server [ ] DNS server [ ] LAMP server [ ] Mail server [ ] PostgreSQL server [ ] Print server [ ] ...
5
votes
2answers
19k views

Connection timeout for ssh server

I'm trying to setup openssh-server, but I'm having some issues connecting. I changed the port to something non-standard (57757) and then set my router to forward to that port. On my LAN, I'm able to ...
5
votes
2answers
3k views

OpenSSH Two Factor Authentication

I'm using Ubuntu Server 13.04 and want to use OpenSSH for sftp. I have everything set up and the only thing not working is the Two Factor Authentication. Currently it asks for a password or the public ...
5
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2answers
455 views

Why do I've two entries per server in known_hosts file?

On my mac I've 1 entry per server in the ~/.ssh/known_hosts file, in Ubuntu I noticed there are two created per server. Why is that? Format is: |1|wwwwwwwwwwwwwww=|wwwwwwwwww= ecdsa-sha2-nistp256 ...
5
votes
2answers
1k views

Server is dropping SSH connections, then not allowing me to log back on

I have an ESX box which I have loaded with two Ubuntu Server machines. During setup, I chose no additional packages to install as I just wanted a lightweight machine for testing. The first thing I ...
5
votes
2answers
721 views

Everytime i am trying to connect to my box using SSH, its failing not connecting

From any other PC doing SSH to my Ubuntu 11.10,is failing. My network setup: Telenet ISP (Belgium) > Fiber cable < > RJ45 cable straight > to Ubuntu PC Even the SSH is running: Other PC: ...
4
votes
2answers
10k views

Cannot ssh into Ubuntu Server by hostname

I just set up Ubuntu 12.04 Server on an old box laying around, connected to my router via ethernet. I set up openssh-server as instructed for remote access, but I cannot ssh into it from my laptop ...
4
votes
2answers
6k views

What causes SSH problems after rebooting a 14.04 server?

Why does rebooting a server running Ubuntu 14.04 give me 'Connection refused' errors? I see ssh: connect to host <IP-address-here> port 22: Connection refused but only for 14.04 and only after ...
4
votes
5answers
1k views

SFTP timeout but SSH works fine

I am unable to sftp (or scp) into my server setup but am able to ssh just fine. I am using key authentication for both. When I sftp it just hangs forever and doesn't give me the sftp prompt. Here is ...
4
votes
3answers
22k views

openssh-server package not available on 12.04.2

I have just done a fresh install of 12.04.2 and found out that i could not ssh to this PC. I tried to install openssh-server but it said that "Package openssh-server is not available..." What is ...
4
votes
2answers
8k views

ssh: connect to host xxxx@xxxx.in in port 22 : connection timed out

I am new to Linux and SSH. when I try to connect to a remote grid computer (for which I have access) I am getting connection timed out error. I have recently installed Ubuntu in my system. I also have ...
4
votes
1answer
27k views

Why do I get “connection refused” errors connecting to a server via SSH?

I've installed Ubuntu 12.04.1 LTS on it with the LAMP stack. I can ping it but when I try to connect to it the server can't be found. When I try to connect with WinSCP I get the error Network error: ...
3
votes
2answers
309 views

Error `could not load host key` when trying to recreate SSH host keys

I am trying to recreate the ssh-server host keys. I have at least two ways to do this: With dpkg-reconfigure dpkg-reconfigure openssh-server This works fine, but I cannot give the key length ...
3
votes
1answer
3k views

Can SSH with IP but not host name?

When I SSH directly to the server's IP address, it works. (ssh michael@10.1.10.129) For reference, here is the resulting prompt: michael@noranetserver:~$ However ssh-ing by name doesn't work like ...
3
votes
1answer
31 views

OpenSSH client not connecting after deleting id_rsa

So I stupidly overwrote my id_rsa and id_rsa.pub files earlier, and I just decied to rm -rf the whole .ssh folder because it was all corrupted/broken after tinkering with it. Ever since that when I ...
3
votes
2answers
4k views

SSH into Ubuntu 12.10 from a remote computer

I am trying to login to my Ubuntu 12.10 desktop remotely. I have the SSH server installed and it works fine when I am on the same network as the Ubuntu desktop. However, I am unable to connect ...
3
votes
1answer
11k views

ssh refusing connection with message “no hostkey alg”

My SSH connections worked well, but from last week SSH from my laptop to my board refusing connection. I can make a SSH connection from the board to laptop, but not vice-versa. I tried that with my ...
3
votes
3answers
2k views

SSH from external network refused

I've installed open-ssh-server on my home computer(running Lubuntu 12.04.1) in order to connect to it from school. This is how I've set up the sshd_config file: # Package generated configuration file ...
3
votes
1answer
2k views

How to address ssh-server with a subdomain for remote access?

I am trying to set up ssh-server on my Ubuntu 12.04 VM (running in VirtualBox on Mac OS X 10.7). I have a domain name, call it foo.com, and I'd like to make ssh available via ssh to linux.foo.com. (I ...
3
votes
2answers
6k views

SSH problem after update

Setting up openssh-server (1:5.3p1-3ubuntu7) ... Creating SSH2 RSA key; this may take some time ... Creating SSH2 DSA key; this may take some time ... start: Job failed to start Can't initialize ssh, ...
3
votes
1answer
325 views

Losing SSH connection when exiting from the main console login

I have installed openssh-server from Synaptics, as usual, on a brand new Ubuntu Desktop computer, 10.10, with all updates and patches implemented. If I have the local console logged in, I can SSH to ...
3
votes
2answers
532 views

How to monitor website stats from the terminal?

is there any way to monitoring the stats from my own website .. like example.com .. just via our terminal without installing plugins .. so we can see real time visitor and bots came and go at website ...
3
votes
2answers
3k views

How do I install FreeNX server so that it works correctly?

I've tried every single possible way of installing the server now, I've read every how to available and I still can't get it to work. Please let me know in which step I do wrong. I'm using ubuntu ...
2
votes
5answers
15k views

How can I access my Ubuntu phone over ssh?

Whenever I try to run apt-get install openssh-server I get the following errors: root@ubuntu-phablet:/home/hablet# apt-get install openssh-server W: Not using locking for read only lock file ...
2
votes
2answers
831 views

SSH Key problem

I want to setup my home server to use ssh keys but when I follow the tutorial on https://help.ubuntu.com/10.04/serverguide/C/openssh-server.html for setting up ssh keys I get this: Bad port 'umask ...
2
votes
2answers
1k views

Can't connect to desktop via ssh

Trying to setup a remote ssh file server (sftp) I've done it before but for some reason with ubuntu 10.10 I cannot connect to the assigned ssh port. I setup the sshd_config file to listen on a ...
2
votes
2answers
752 views

How do I remotely patch openSSH to allow handshake obfuscation?

I believe that my Chinese ISP has started detecting and bandwidth-limiting SSH connections. I'm not using the default SSH port so I suspect that they are using deep packet filtering to detect the ...
2
votes
3answers
6k views

Where to get complete offline installer for openssh-server?

I want to download a complete off line openssh-server package installer. I need the offline package to setup for my school project but I don't have the internet facility in the lab.
2
votes
1answer
85 views

Messed up with my ssh_config file. How can I recover the original file?

I was setting up ssh on Ubuntu. I accidentally copied the contents of sshd_config in ssh_config file! Is there a place where I can find the original one? Fortunately I didn't touch the ssh_config. I ...
2
votes
3answers
709 views

Can't SSH into Ubuntu Touch device

From my computer: cameron@cameron-ubuntu:~$ ssh phablet@192.168.99.124 Permission denied (publickey). So it seems that openssh on the phone doesn't have password authentication enabled. But it ...
2
votes
1answer
583 views

How to give restricted access to user

I have a home PC and I created a reverse port forwarding to a server. Now I would like to go access to some people to the Home PC through this server. I would like to control the access of the user on ...