Questions tagged [openssh]

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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84
votes
4answers
445k 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 ...
16
votes
6answers
33k 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 /var/lib/...
113
votes
14answers
1.1m 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 ...
128
votes
4answers
304k 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 without-...
47
votes
2answers
45k 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 ...
33
votes
4answers
45k 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 ...
11
votes
2answers
69k 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 ...
7
votes
2answers
8k views

How do I setup SSH key based authentication for GitHub by using ~/.ssh/config file?

I am trying to set up my SSH keys for GitHub and created a new SSH key for the same. I have managed to setup the SSH key but I wish to retain these settings and save them in the configuration file ~/....
26
votes
2answers
155k views

Connecting to Ubuntu server via SSH externally

I have recently installed Ubuntu Server 12.04 (Precise Pangolin) 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 ...
55
votes
9answers
228k views

How do I install an SSH private key generated by PuTTYgen?

I set up my Linux server to accept connections from my home PC by adding the public key generated by PuTTYgen to the authorized_keys file. Now I'm trying to connect to the same machine, but this time ...
12
votes
3answers
12k 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 ...
25
votes
12answers
312k views

SSH error: Permission denied, please try again

I have an Ubuntu server setup using amazon ec2 instance. I need to connect my desktop (which is also a ubuntu machine) to the ubuntu server using SSH. I have installed open-ssh in ubuntu server. I ...
7
votes
2answers
17k views

X11 forwarding in SSH

How to run X11 GUI applications from a remote server using SSH? For example: my first desktop 192.168.1.1 my second desktop IP 192.168.1.12 I 'm sshing from my first desktop to the second and i ...
18
votes
3answers
49k 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 then. ...
1
vote
1answer
22k views

error while loading shared libraries: libssl.so.1.1 (and libcrypto.so.1.1)

As you can see I'm missing libcrypto and libssl files. I locked out myself from my server after running apt-update and apt-upgrade, I'm running this from web console, because ssh nor any other program ...
51
votes
7answers
303k 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.
16
votes
2answers
31k 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 ...
7
votes
2answers
26k views

How could I shutdown a remote host, in my network thru ssh, with a local host?

The question is simple. What would be the script I would have to use to shut down a computer in my network thru ssh. Normaly i would go to command line and: ssh desktop delik@desktop's password: ...
8
votes
2answers
16k views

Key based SSH login that requires both key AND password

My problem is : I developed successfully RSA Key based ssh login on board from system. When a client logs in for the first time, ask about private key and passphrase also which works fine. In second ...
11
votes
7answers
55k views

libcrypto.so.1.0.0: no version information available (required by ssh)

I get the following error: jalal@klein:~$ ssh -i "hyunwoo_key.pem" ubuntu@ec2-52-23-201-2.compute-1.amazonaws.com ssh: /home/jalal/computer_vision/MCR/v901/bin/glnxa64/libcrypto.so.1.0.0: no version ...
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 10....
1
vote
1answer
4k views

VNC vino over SSH tunnel ONLY

I've been searching for hours now, can't figure this one out. I am trying to make the following happen: Client: remmina + ssh tunnel Server: Lubuntu + openssh server (public key authentication) + ...
3
votes
1answer
2k views

How to convert Filezilla PPK to openssh sftp compatible key

I'd like to use the command line sftp client and sshfs and have been given a filezilla ppk file. How do I extract the keys into a format that works with sftp, openssh? I tried just copying the ...
2
votes
1answer
520 views

Is it possible to use DD to obtain splited images from a hard-drive?

My piano teacher asked me to record one of his recitals with his iPod (3-4 generation, not so sure) and I did it. While trying to edit it, he accidentaly deleted it, I'm trying to recover. After some ...
249
votes
5answers
341k views

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 'blah.blah....
35
votes
5answers
184k views

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 ...
17
votes
2answers
86k views

Start SSH automatically on boot

Completely brand new to linux and Ubnuntu. Setting up a machine to do deep learning/neural networks. So far it is going well. Got everything installed and running. I want to be able to ssh from my Mac ...
10
votes
5answers
73k 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 ...
10
votes
6answers
30k 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 ...
17
votes
4answers
41k 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 ...
12
votes
4answers
18k views

How to disable autostart of SSHD in Ubuntu 15.04

In older versions of Ubuntu I commented out the "start on ..." line in /etc/init/ssh.conf. This worked well, but not in Ubuntu 15.04.
6
votes
1answer
3k views

Execute prelogin scripts for SSH

I would like to know how I can execute a local server script, for instance send a mail using mailx, when a ssh session is opened, pre-login stage. When a ssh connection comes into the server, I ...
5
votes
1answer
19k views

Enabling and disabling sshd at boot via systemd

I have openssh-server installed but I'd like to sometimes leave the sshd service off by default at boot, and only start it from the terminal as needed. Based on the the advice of many other questions,...
10
votes
2answers
24k 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 ...
5
votes
3answers
44k views

No more authentication methods to try. Permission denied (publickey)

I have set up a home network behind a router a while ago and use openssh to access the network consisting of my laptop, wife's netbook and my desktop all running l/x/ubuntu 12.04. This worked ...
3
votes
4answers
80k views

Uninstalling ssh

ssh is installed in my system. ssh -V OpenSSH_6.6.1p1 Ubuntu-2ubuntu2, OpenSSL 1.0.1f 6 Jan 2014 But when I try to uninstall it completely using sudo apt-get purge openssh-server it says ...
2
votes
1answer
14k views

Why ID card reader is not working in Ubuntu 12.04, 12.10? Using Omnikey3121

I have this Omnikey 3121 which is an USB ID card reader. Connected to my Ubuntu. When i try to read Belgiun ID Card or any other card it does not work always missing to provide results. How can i make ...
12
votes
1answer
18k 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 ...
10
votes
1answer
34k views

Limit SFTP user access to specified directory

I have a Ubuntu 14.04 server installed with open ssh. I'd like to configure sftp for customers to be able to download files only. In other words, I put files in a directory that they are jailed to. ...
10
votes
2answers
63k 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 ...
10
votes
2answers
23k views

apt-get dependency issue Open-SSH Client

This is on an Ubuntu 12.04 Server. I'm getting this error when trying to run any apt-get install (trying to install unrelated, arbitrary packages): dpkg: dependency problems prevent configuration of ...
4
votes
1answer
46k 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: ...
4
votes
3answers
3k 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 seems ...
3
votes
4answers
22k views

Update OpenSSH Server in 12.04?

I'm having hard time updating openssh-server in ubuntu 12.04, I stupidly downloaded .deb file for 14.04 and of course it didn't work :/ I've tried sudo apt-get -f install, it just removed my openssh ...
0
votes
1answer
1k views

Cannot install Openssh-server or client [duplicate]

When I go to install, I get this error: sudo apt-get install openssh-server Reading package lists... Done Building dependency tree Reading state information... Done Some packages could ...
0
votes
2answers
3k views

how to install openssh from usb?

Hi I have installed ubuntu from bootable usb. During installation I did not pay attention for Openssh server in software selection screen. however is it possible to reboot from usb to just install ...
9
votes
0answers
21k views

Installed 15.04, cannot restart ssh daemon [duplicate]

As the title says, I installed 15.04. One of the first things I did was sudo apt-get install openssh-server. The next command was sudo restart ssh, which is greeted with an output of: restart: ...
5
votes
2answers
1k 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: ...
3
votes
2answers
1k views

How To Login to VPS Using SSH/RSA Keys

I followed the instructions here and created a set of ssh keys (rsa) whilst logged into a vps as root. Encryption level 4096 as suggested... The keys were already on the host so no need to transfer......
3
votes
1answer
3k views

How to test plymouth via virtual machine?

I am trying to edit my splash screen but its really annoying to restart the computer everytime just to find out it doesn't even work. i read on an article that I can do a virtual machine via ssh but I ...