SSH, otherwise known as "Secure Shell", is a method for securely connecting to a remote computer.

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Can't get root passworldless ssh to work

I have master and slave machines and wish to be able to passwordless ssh between root accounts. On slave I did sudo su - root and passwd to set up a root password. On slave I edited /etc/ssh/...
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17 views

Ssh to target host via gateway

Have a HostA that located in internal subnet which could be seen only from gatway host. Then I issue command like: %ssh -t -o ProxyCommand='ssh GateWayUser@GatWayHost nc HostA 22' HostAUser@HostA ls -...
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Copying a user with ssh keys

I am writing a kickstart install script that will set up a user on a server with the previous files and permissions it held before. The user I am setting up has ssh keys located in .ssh/ that I also ...
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1answer
16 views

How to limit the amount of time SCP tries to connect for?

I have a bash script which copies any files in a 'to_send' directory, to a remote server via scp. The script runs an scp command on each file, checks the return code, and moves the local version from ...
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1answer
26 views

Unable to login with an SSH key

I am trying to login with an SSH key on Ubuntu but the problem is that, at login time, I am asked to enter the password instead of a passphrase key. I setup permission, generated a key multiple times, ...
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13 views

How to install openssh-server on BQ Aquaris M10 Ubuntu tablet?

I want to connect via SSH to my M10 Ubuntu tablet. Thus, I tried to install OpenSSH server on the tablet as explained here. However, that's what the tablet says: sudo apt install openssh-server W: ...
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11 views

USB Keytoken, Network Drives, and Encryption

(Note to site owners: What is your policy on cross-posting from another forum such as ubuntuforum. The following has already been posted there but without a satisfactory answer in over three weeks.) ...
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0answers
15 views

X over SSH error

So I have a simple question. I am trying to run programs that use graphics rendering using X11 forwarding. Currently I have two computers both running XUbuntu 16.04 LTS, a desktop and a laptop. I am ...
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2answers
38 views

Can't access Ubuntu through Windows Remote Desktop

I have a laptop with Ubuntu Server set up and I can access it via SSH fine. So I installed XRDP and XFCE4, but I can't accesss it via Windows Remote Desktop. Any ideas?
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2answers
4k views

SSH allow windows AD groups(with Special charactors)

I have join my linux to windows domain succesfully, and now everyone in the domain could able to login to the server by using ssh. But we only want to restrict certain users from a group to login. ...
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1answer
16 views

How to check multiple id_rsa keys in ubuntu before git pull

I have two different id_rsa keys which are as follows: /home/ubuntu/.ssh/id_rsa_1 /home/ubuntu/.ssh/id_rsa_2 I have added both in ssh, and the result of ssh-add -l is as follows: 4096 cb:c2:9e:06:...
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1answer
88 views
+150

Install custom Ubuntu iso from network card

I have a few customized Ubuntu ISOs (based in Ubuntu 12.04) that I need to install in a SBC embedded in an enclosure. Until now, I have to open the enclosure, connect a screen, keyboard and a USB ...
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1answer
7k views

“PTY allocation request failed” error when trying to connect using SSH with ControlMaster

I'm trying to log into Ubuntu desktop. I get the following error message: PTY allocation request failed What does it mean and how to connect to my desktop? This is the output with -v: debug1: ...
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4answers
50 views

Run GUI on remote computer and control it from local computer

Problem: Parents can't operate computer and I'm going overseas. So I'm leaving behind an old laptop with linux on it (let's call it homecomp) for video chat. I can teach them to power on and login (...
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2answers
63 views

Is it safe to revoke group other access to every directory in a file system?

I'm trying to secure an account on our server called ssh_user that is used purely for connecting via SSH to our server. Everyone on our team logs into this account via a PSK secured ssh connection ...
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10 views

Application running over ssh (X11 forwarding) lagging a lot with local dual monitor

I have 2 machines: - My Desktop (running ubuntu 15.04) - Development machine (running ubuntu 14.04) (both on same LAN) So far, I've been working without any issues using "ssh -X eduardo@devel1" and ...
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13 views

Reinstalling Ubuntu via SSH, keeping home folder/partition

I have a dedicated server that I cannot access anymore, for some reason, after a reboot. It refuses SSH connections. The machine had otherwise been running for a month without issues, and multiple ...
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17 views

How to redirect ssh logins to server's Docker containers

I'm planning a server for the students studying Linux and have some rules for this. All students will get the same server domain/port for SSH, and each own username/password(normal privilege). 4 ...
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1answer
21 views

OpenSSH on Ubuntu 16.04 shows ECDSA keys in an unusual format

I'm trying to SSH to my server, and the client is asking about the authenticity of the host. ECDSA key fingerprint is SHA256:bla bla bla With every version of OpenSSH I've used, ECDSA (or RSA) keys ...
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12 views

How to keep VPN connection alive after ssh disconnects

I'm trying to download a large file on my vps which needs to be done using vpn. I use screen to keep wget process running after I close ssh connection to server, but the vpn connection will be lost as ...
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2answers
7k views

Problems using the start-dfs,sh on hadoop 2.2.0

Im using this tutorial for installing hadoop 2.2.0 http://codesfusion.blogspot.in/2013/10/setup-hadoop-2x-220-on-ubuntu.html I've completed many of the steps successfully but I'm stuck over this ...
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20 views

Is there a good way to ensure that I can still log into a machine even under heavy load?

I am considering increasing the priority of sshd by setting minimum niceness -20 via a nice stanza in the upstart script. Has anyone done this? Does it work? Has anyone done this and had problems? ...
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1answer
20 views

SSH: Set timeout for broken pipe

ssh has the paramater -o ConnectTimeout=10 to set the timeout in seconds when establishing the connection, but once the connection has been established, the parameter has no more effect. When an ...
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28 views

Upstart services work in SSH session, but not in local terminal session

If I open a local terminal, and attempt to start an upstart service I get this error: service rsync status status: Unknown job: rsync But if I SSH in as the same user, it works fine: service rsync ...
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4answers
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What is the difference between `ssh -Y` (trusted X11 forwarding) and `ssh -X` (untrusted X11 forwarding)?

What is the difference between ssh -Y (trusted X11 forwarding) and ssh -X (untrusted X11 forwarding)? As far as I have understood it, it has something to do with security, but I did not grasp the ...
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1answer
32 views

Unrecognized Service ssh when building from source

So I have a web server that is running 14.04LTS because that is the latest Ubuntu Distribution I can have through my VPS. I have been trying to install OpenSSH 7.2p2 via building the source code via ...
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2answers
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How do I use SCP with two different ports on each IP in script bash

How do I use scp with two different ports on each IP. SSH LOCAL : IP=111.111.111.111 & port=22 I have a redirection ports on a router EXAMPLE SCRIPT BASH: for i in "${array[@]}" array[1]=...
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1answer
19 views

Remotely log into multiple computers and run a python script

I am currently trying to set up network rendering with Blender using computers on different networks. I made a script that launches blender and connects to the host's computer. My problem is that I ...
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1answer
29 views

how to install ubuntu server on remote system through SSH

I am trying to install ubuntu server on remote system through SSH. Remote system is completely blank and is not having any os on it. Can anyone please give some HINT how to do this??
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4answers
11k views

How can I copy/paste files in the terminal window (SSH)? [duplicate]

I am new to ubuntu and my friend told me to SSH into my IPod so i can put/remove songs on it. I've been succesfully ssh'ing into it but i do not know how to copy and paste my songs from my Home ...
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18 views

usb keyboard and network stooped working

I have an old pc running Ubuntu server 14.04 lts, it is used purely to run plex media server, yesterday i noticed an update was out for plex media server, so my routine is to login to my server using ...
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1answer
23 views

Unable to connect to Ubuntu 14.04 guest from Ubuntu 14.04 host in VirtualBox

I was trying ssh hands-on and was trying to connect to a Ubuntu guest 14.04 on VirtualBox from a Ubuntu 14.04 host. I had opened port 22 in both the endpoints and tried the ssh command. I got a "no ...
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46 views

VNC Error: Xsession: unable to start X session: Help!

I have run into a bit of trouble whilst installing tightvnc server on my new VPS which is running ubuntu 14.04 As I am a linux newbie, I used this guide https://tjosm.com/47/setup-remote-desktop-...
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1answer
46 views

Trying to ssh root, why get permssion denied in 16.04?

I'm trying to set up passwordless ssh between root accounts in 16.04 (needed for Hadoop installs). I set up a password for root by sudo su - root and passwd. When I try e.g. ssh -l root slave3 or ...
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3answers
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How to set up passwordless ssh for root account?

i am trying to follow the instructions here to set up passwordless ssh between root accounts (needed to use Ambari). However this involves ssh-copy-id user@machine and since user is root, when I try ...
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12 views

How to make a SSH connection if my proxy server doesn't allow connections at port 22?

My college internet uses a proxy server to provide internet to the students with a firewall which only allows connections at port 443 and port 80 and blocks others. I want to know is there anyway I ...
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1answer
9k views

Ubuntu Desktop 15.04 Installing openssh-server : missing dependencies

I recently installed Ubuntu Desktop 15.04 in a VM. I chose this version as opposed to using the Server image just to have a pretty GUI to click. Upon checking, there isn't an SSH server installed ...
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1answer
24 views

GSSAPI ssh login on Ubuntu 14.04 with SSSD and Active Directory

I'm trying to move from 12.04LTS with likewise-open to 14.04LTS with sssd using realmd and I've got it working for the most part, but I can't get Kerberos SSO to work. Under likewise I was able to do ...
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Ssh not working on rpi3 [duplicate]

I downloaded ubuntu and written on sd card using win32 image writer. After that inserted imto rpi3 and booted. I was able to ping but not able to do ssh. Please suggest how to resolve this. I am ...
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2answers
4k views

Editing remote files via SSHFS mount very slow (Sublime Text)

I'm trying to nail down the best way to work on projects located on a remote server. I use Sublime Text and I've been experimenting with SSHFS on Ubuntu to mount the remote directory locally and then ...
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16 views

Cannot add SSH key to MaaS

I have install Ubuntu 16.04, kernel 4.4.0-24-generic. As MaaS I have generate SSH keys using ssh-keygen -t rsa I hit enter for no passphrase I have typed more ~/.ssh/id_rsa.pub to get the key I have ...
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1answer
5k views

Permission denied (publickey,gssapi-with-mic)

I am trying to connect to a VM using this command: sudo ssh -i /home/ritesh/.ssh/id_rsa1 tc@54.80.22.15 -L 5901:localhost:5901 But it's giving me this error: The authenticity of host '54.80.22.15 (...
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1answer
56 views

ssh X forwarding doesn't work

I have ssh access to two non-local Ubuntu servers. I use an Ubuntu laptop to connect to these servers. Unfortunately X11 forwarding works on one of them, but not on the other. Server1 (running Ubuntu ...
3
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1answer
23 views

Irssi certificate, OpenPGP and SSH keys in a new install

I'm intending to perform a full fresh install of Xenial 64 bits on my laptop currently running Trusty 32, bits since my CPU is 64 bits capable. I want/need to keep my current Irssi certificate, ...
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1answer
77 views

16.04 > SSH client slow in remote server

I've got a fresh new laptop with Ubuntu 16.04 and I'm experiencing slowdown problem in console/terminal when connecting in ssh in a remote server: connexion is slow and typing char has some delays. ...
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1answer
44 views

Unknown Cipher Type '3des' on SSHv1

Right now I am having an issue with connecting to a huawei router through SSHv1. Just to let you know, it works with SSHv2, but I need SSHv1 to test some special stuff. So I open terminal and write: ...
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2answers
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Can't use SSH at all

I'm having some problems when trying to use the command ssh-copy-id in my server, unfortunately I get the following response: ssh: connect to host 192.168.10.10 port 22: Connection refused I can't ...
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1answer
36 views

I tried installing the ssh_package into my ubuntu 16.04 but it is giving me this error. I am running ubuntu on VMWare workstation pro [closed]

rmehra@ubuntu:~/Desktop/ssh_package$ sudo dpkg -i openssh-client_1%3a5.3p1-3ubuntu7_i386.deb (Reading database ... 172254 files and directories currently installed.) Preparing to unpack openssh-...
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1answer
4k views

SSH: Can connect locally but not “remotely”

A bit of background: I'm a ubuntu user for almost a year now. I had an old box lying around and decided to put it to some use. The first thing I wanted to do was set up SSH so that I can place it in a ...
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What privileges should I give to a user who can access my SFTP but only reads them

I have a current root user which is able to do, well ROOT privileges on my SFTP running on Ubuntu LTS 12.04. I'm planning on adding a new user that can only read a specific directory inside my sftp. ...