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

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How to start/configure pulseaudio remotely with ssh?

I have a remote machine to which I can ssh. On the remote machine there is a program that uses pulse audio to get input from a USB microphone attached to the remote machine. This setup works fine when ...
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440 views

SSH update to 14.04: The disk drive for / is not ready yet or not present

I am not able to restart my Ubuntu server after upgrade from 13 to 14.04. What can I do to make things work again? I tried to upgrade my server over ssh to ubuntu 14.04. When the installation ...
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82 views

Display issue on remote machine using GDM X11

I am remotely logging into an Ubuntu machine through SSH(MobaXterm) using Gnome desktop remote environment from my Windows PC. I am having trouble with one of our video applications in displaying ...
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424 views

Using gnome-keyring with svn via ssh and mysql-workbench

Problem: mysql-workbench fails to connect to the keyring to connect to mysql. I'm trying to get my svn command (which uses an svn+ssh uri) to prompt me to enter my password for my local rsa secrets. ...
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351 views

What do these lines in the UFW logfile mean?

These lines are repeated several times, first one at the time when remote ssh connection with the machine is lost (mac address is the address of eth used for Internet connection) Mar 24 21:20:32 ...
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468 views

How to prevent autossh from becoming stuck once in a while?

I am using autossh to build a reverse ssh tunnel but from time to time the tunnel stops working and I need to kill autossh and start it again. /etc/cron.d/autossh @reboot autossh -f -nNT -R ...
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16 views

Set user- or group-specific MOTD in SSH

I would like to disable or change the MOTD shown on SSH login on a per-group/per-user basis. This question on SuperUser has an answer stating that I can use Match blocks in sshd_config. However, man ...
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260 views

Using SFTP with SSH ForceCommand directive

I have set up an SSH server (call it group2.fqdn) with this ForceCommand directive: Match Group group1 ForceCommand ssh -t group1.fqdn Match Group="*,!local,!group2,!root" ForceCommand ...
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50 views

Understanding ssh - apparent IP address: dynamic vs local port forwarding

I have ddwrt on my router back home and I'm playing with ssh on my laptop from a remote location to better understand ssh. My router has port 5000 listening for incoming ssh which it port forwards to ...
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67 views

How to prevent Ubuntu Server sleep/hibernation

I'm running the latest Ubuntu Server (quite literally downloaded & installed yesterday) on a box under my desk. I've got trac installed and OpenSSH. Intermittently both become unavailable, as if ...
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170 views

Refused connection of ssh

I installed openssh on my new Ubuntu14.04 server, turned on ssh, and enjoyed it after I finished installation. Every thing was fine; however, after just one night, I was blocked when using putty as ...
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14 views

Amazon aws type keys generation

There is perfect security model when connecting to Amazon AWS instance. But I would like to be able to make such key my self for custom user. To be clear it will be user with git repository, but it ...
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288 views

How do I chroot an SSH user to their home directory?

I don't want to use jailkit. My OS is Ubuntu 14.04. I am setting up a user account on my server for a kid I tutor, so he can run a minecraft server. He will be using putty to ssh into my server, and I ...
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39 views

who / w / logname broken in multiple terminals

I have a strange problem: In a GUI session, depending on the terminal being used the following two (related) problems appear: who and w doesn't list the user's active session logname returns ...
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75 views

How to do port forwarding over a public network?

I am stuck in one complicated task , i am having following structure, _____________________________ | [PC1]--(in same net)--[PC2] |----(Over internet or public ...
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193 views

after ssh session : -bash: /bin/ls: no such file or directory

I've logged into my Ubuntu server from work via putty under Windows. Right away I noticed something weird. I could not use the ls command. Got: -bash: /bin/ls: no such file or directory I didn't pay ...
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71 views

How to access Amazon EC2 instance from Ubuntu 13.10?

I have an Amazon EC2 (Windows) instance which has been created for me and I have public DNS, public IP and the public key. I would like to RDP to this instance from Ubuntu 13.10. I have recently ...
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188 views

How to set up ssh-agent

I have set up ssh-agent. The problem is, it stills asks for a pass-phrase every time! How do I set it up to only ask for a pass-phrase once? It would be best if it only asked when it was first needed, ...
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260 views

Samba, PAM and encrypted home directory

So, I have an encrypted home, PAM usually unwraps the passphrase via /etc/pam.d/common-auth and /etc/pam.d/common-session-noninteractive. This works fine for SSHD sessions, however when I open up a ...
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509 views

ssh-agent running but not working when logged in using PuTTY

When I am using the terminal directly on the machine running Ubuntu 13.04 ssh-add works fine using the process: /usr/bin/ssh-agent /usr/bin/dbus-launch --exit-with-session /usr/bin/im-launch ...
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258 views

Server in LAN with two network cards, can't telnet / ping to the second even if it works

I have an issue with an Ubuntu 12.04 LTS (updated) server. For reasons too long to detail, it has got one eth0 interface assigned to 192.168.1.9 and one wlan0 interface assigned to 192.168.1.10. Both ...
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97 views

How to administer, manage & update 40 to 50 Kubuntu laptops?

I have a custom developed application presently running on about 40 Kubuntu laptops (& more planned). Every few months I have to update the application. I also have to run Ubuntu updates and a few ...
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99 views

How do I activate PulseAudio when only being logged in via ssh?

I am using a console-based music player, called cmus. It is in the repositories. If I ssh into my desktop computer from, say, a laptop and start cmus, I would like to be able to play music. But, if ...
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227 views

ssh-agent not accessible within a schroot

I'm using an schroot to do some builds of deployment packages, and there's a lot of to and fro between the host and the schroot environments. Within the schroot the ssh-agent doesn't seem to be ...
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129 views

How can I let somone over ssh have access to pulseaudio?

I recently had a really good post here where I was able to figure out how to setup virtualgl and use it with X11 forwarding in ssh. I am using it to make a kind of multiseat setup. I only have one ...
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519 views

Cannot SSHFS mount user home directory

I am attempting to setup a centralized home-directory server through sshfs and pam-mount. Currently I am stuck at this point: When attempting to mount the remote home directory sshfs just gets ...
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289 views

A Linux container can use an authorized_keys file outside my home directory, but ephemeral containers based on it can't. Why?

In Ubuntu 12.10, I've created an LXC of type 'ubuntu' using the lxc-create utility. I then create ephemeral containers based on this container using the lxc-start-ephemeral utility, and I need to ...
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93 views

who is scping your ssh server

Just you can run w to find who is sshing into your server, how can you find out who is scping into an Ubuntu laptop?
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278 views

Problem with applying socks proxy systemwide

i trying tunnel my traffic through SSH server. when i use Firefox network setting, it work well but when i try apply the socks proxy system wide from ubuntu setting and tunnel google-chrome traffic, ...
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72 views

Suspending the current ssh connection

I'm new to Ubuntu and trying to learn ssh connections. I learned trick to suspend the current SSH connection and come back to localhost using: ~ + Ctrl-Z When I press Shift+~, I suppose that the ~ ...
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417 views

SSH Connection time out

Whenever I try to SSH my VPS account it says: SSH connection time out during banner exchange. I want to know the reason behind this problem and a solution. My VPS is running Ubuntu 12.04 Server ...
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17 views

No MOTD on Ubuntu 14.04…?

I recently did a fresh install of Ubuntu 14.04. When I SSH, there is no MOTD (and yes, I have the appropriate command set in sshd_config). I read a bunch of tutorials about setting up MOTD, but I ...
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26 views

Setting up a preferred network interface in linux

I need to set up the network interfaces of a linux box running Ubuntu Server. The box will be deployed in an industrial vehicle and will operate headless (i.e. no monitor, no keyboard/mouse). The ...
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33 views

Ubuntu 12.04 server reboot issues after updates

I have a 12.04 LTS ubuntu server (I used the how to forge guide to setup apache, php, postfix, dovecot, bind and ISPConfig). I have noticed a somehow random reboot issue which I have eventually ...
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26 views

Unable to reach server by SSH

In a state of "only 10 more minutes left until the weekend" I did an apt-get upgrade last Friday to ignorantly fix the reported shellshock error. The upgrade seemingly went fine and I logged of the ...
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41 views

Passwordless ssh not working?

I set up passwordless ssh between my Ubuntu 14.04 desktop laptop and my server running Ubuntu Server 14.04. It was all working. Then, I rebooted my server, and after that it stopped working. I tried ...
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Is it possible to forward Windows… windows into Linux? (Like unity/seamless or xypher)

If this is a "bad question" or otherwise something you mods want to close... please at least direct me somewhere that could answer it, because that kind of thing happens to me a lot and I end up ...
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255 views

SSH into Ubuntu server (14.04.1) Using mac terminal (os version 10.9.4)?

I am having difficulty connecting remotely to the ubuntu server from the mac terminal. So far I have run: sudo apt-get install openssh-server when I try to connect via the ip address I get an ...
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162 views

vi issue in SSH TTYs to Ubuntu 14.04.1 LTS

After upgrading my server to Ubuntu 14.04.1 LTS, I can no longer use the vi editor to edit anything in an SSH terminal (I access the server by launching ssh sessions from Cygwin running on Windows). ...
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45 views

SSH user problem

I am sort of a Unix newbie, trying to set SSH for my 12.04 server. I have 2 users in my system one has password the other does not, both are set as admins. My object is have the passwordless user ...
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123 views

/dev/mem: mmap: Operation not permitted: Using dmidecode

I am trying to get my BIOS firmware version, and memory info using dmidecode. I am connected to the server through ssh as a root user. We recently just started moving our servers from Debian 6.0, to ...
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113 views

Create FTP account with vsftpd limited to one folder only?

Have a fresh Ubuntu install 14.04 on digital ocean. Just installed vsftpd using this guide: https://help.ubuntu.com/12.04/serverguide/ftp-server.html#vsftpd-userauth-configuration The only things I ...
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22 views

Fresh install of ubuntu SSH only working from localhost

I installed the latest version of ubuntu on ESXi as a VM. I then installed openSSH and it worked once from a remote machine and got hung up when trying to execute a command on mysql. Ever since I ...
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202 views

SSH connection failing since I changed server port number

Yesterday I changed the default ports on the server from 22 to 1993 then restarted but now I can't connect at all. I used ssh -i keyname.pem ubuntu@remotehost to connect then sudo vi ...
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12 views

SFTP Excecute Bit does not seem to be working correctly

I am trying to replace an existing FTP server and switch the users to be using sftp. We have some strict requirements as far as permissions required on the folders. For instance on the user's FTP ...
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134 views

SFTP/SSH Not Working in Ubuntu Touch

It was working before but now it stopped working. Even in Ubuntu SDK I can't run my application directly to my device...though I'm not sure they are related. The error is: Command: open ...
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41 views

how to change desktop background in ubuntu desktop

I was using gnome desktop environment at the start but i switched to unity environment by install unity shell via this command sudo apt get install Ubuntu-desktop after this I have many issues like ...
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25 views

SSH to cluster under a VPN

My university requires that I connect to VPN, in order to connect to our cluster. I have, after a long struggle, managed to connect to the VPN using the FortiClient VPN command line interface. My ...
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31 views

Server Upgrade an 'end-of-life' Server from ISO over SSH

I have read that it is possible to upgrade ubuntu from an ISO image, but would the same be possible from a remote location over SSH? After mounting the ISO, what command would I use to upgrade? I ask ...
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36 views

ssh, problem with headless device

I have Ubuntu 14.04 installed on a headless device. Since the last update and shutdown it is not possible to connect via ssh anymore. nmap shows the machine is up and in the network, all ports are ...