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

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Chrooting to a mounted USB Stick using SFTP

I would like to use SFTP over OpenSSH as a small FTP server. However I would like to use a mounted hard drive or USB stick as the chrooted directory for the user. As far as I see, chrooting is ...
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471 views

How To Configure Multiple Virtual Machines As An Internal Network Via SSH

First of all, I am using Windows 7 as a host. Then I install Ubuntu 12.04 Guest under VirtualBox. Then I get an access to the other four virtual machines (also Ubuntu 12.04 Guest) via ssh by running ...
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2k views

Force lease renew for leases in /var/lib/misc/dnsmasq.leases

I have a Raspberry Pi connected to my laptop (running 13.04 with Gnome) via direct ethernet using these instructions. Normally, the RPi will connect and work just fine. However, if I disconnect the ...
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153 views

Ubuntu server 13.04 ssh keygen issue

I want to be able to use github and their service hooks to deploy sites and apps to the server. To do this I need to create an ssh key and put the public key into github. I go through the ssh-...
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203 views

How to run openmpi on virtualbox with 3 PCs through SSH?

I have 3 PCs with Vista, running Ubuntu through Virtualbox on them. I have installed openmpi and ssh on them, they are connected via ethernet. The IP addresses are all 10.0.2.15. And I can ping with ...
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907 views

Suddenly cannot access SSH on LAN

I had ssh running on my LAN server. Suddenly (not sure what I did), I cannot access the LAN server via ssh. When I try, it just hangs for a while with no response and finally comes out with a timed ...
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628 views

mount a remote (ssh) usb disk?

My home server has an external USB drive connected. I prefer to keep it unmounted so I don't have to log in if I want to unplug it (for backup rotation). But I'd also like to be able to browse it in ...
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365 views

ssh client times out to some servers, works on others

I have a strange problem and I'm not sure where to begin. My ssh client works on some servers but times out on others. Obviously, I checked that the servers are accessible via ssh from other ...
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688 views

Suddenly cannot SSH into server from LAN, but can from outside LAN?

This is the weirdest problem I've ever had with trying to ssh into a server. Suddenly I can't ssh from my workstation to the server on the LAN. I can do so just fine from home, however. /var/log/...
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15 views

Asking remotely a computer to wake another via WOL

I understand Wake on Lan can not work if you're trying to wake a computer from outside the network. Currently, on a very far observatory, there's this computer (let's call it "server") shutting off ...
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16 views

Can't copy ssh from Ubuntu server to Rpi

I have a digitalocean server that i watn to use to orchestrate a couple of RPies with Ansible. I have created the key pair and i'm trying to ssh-copy-id pi@#####... but all i get is this: /usr/bin/...
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23 views

Why ping and ssh resolves different Ip?

Honestly I have no idea what happened but ping not connecting to the right ip address so can't login with ssh. Say my server ip address is 136.17.90.160, but when local when ping... (venv) simon@...
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15 views

Ubuntu 14.04 - need ssh access on Ethernet to execute the commands and wifi access to send data

Ubuntu system has two interfaces - ETh0 & wlan0 ETh0 is conected to local test network through switch wifi is conected to Access point Eth0 got ip 172.18.201.100 wlan0 got ip 172.18.202.87 ...
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6 views

PHP script wait on ssh input

I'm not sure if this is an ubuntu question or a php question, but: I am trying to run a script via ssh on a remote server, and I want my php script to continue running only when it receives a signal ...
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15 views

Could not connect to display tower:10.0

Got a tower with /etc/ssh/sshd_config like following: X11Forwarding yes X11DisplayOffset 10 X11UseLocalhost no when I connect to it with ssh with my laptop with following .ssh/config file Host=* ...
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11 views

Ubuntu Server - After reboot key always refused, until login

I installed Ubuntu Server and also configured the ssh server. I tried the "key system", so I have a public key in ~/.ssh/authorized_keys, and also configured this file in /etc/ssh/sshd_config. When I ...
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11 views

Not able to access MySQL, not via Virtualmin or SSH. Tried everything

Using Ubuntu on 14.04. I installed Virtualmin and it says ''MySQL does not appear to be installed and running on your system, or has not yet been set up properly in Webmin's MySQL Database module. If ...
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21 views

What's wrong with my autossh tunnel?

This is my synergy tunnel between my desktop and my laptop. Both are Ubuntu 14.04 LTS. Note that localhost is the desktop. This works: ssh -N -f -L 24800:localhost:24800 laptop This doesn't (I ...
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24 views

avahi local domain not working in ubuntu mate 16.04

I used to use ssh with hostname.local but now it has stopped working. Is this a problem with all ubuntu installation or just mine? avahi-browse -all displays no output
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8 views

Need assistance on understanding debugging MPICH executing on cluster

I am running into a few issues with the SSH and MPICH executing. From some previous questions that I asked, I was able to progress to a point where I executed the mpi_hello.c program. For reference, ...
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18 views

Cannot ping myself (127.0.0.1) or ping outside or ssh into my ubuntu 12.04 server

My server was working fine a few days ago. I was able to SSH in. Today all of a sudden I can't SSH in, but I'm able to access the console directly in order to troubleshoot the issue. I tried ...
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17 views

How to ssh into a remote server which has a shared IPv4 (NAT)

Im running Ubuntu 16.04 LTS and I have tried using the information given on #man ssh But I am a little confused and I tried many times and got this message ssh: Could not resolve hostname w-: Name ...
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63 views

vagrant up throws The following SSH command responded with a non-zero exit status error for Laravel Homestead

I'm trying to install Laravel Homestead on my Ubuntu 16.04. But I get this error when I want to run command "vagrant up": milad@miladlenovo:~/Homestead$ vagrant up Bringing machine 'default' up with '...
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10 views

Cannot connect to server through hostname, but can connect to another PC through hostname

I'm running a Windows 7 PC, which I connect to two Linux PCs using GitHub's SSH client. One of the remote PCs runs Linux Mint 17.3, the other which I can't connect to with hostname runs Ubuntu Server ...
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26 views

How to install HBase on Hadoop with 4-node cluster on Ubuntu 16.04?

I am new to Linux and need to install HBase. I have already installed hadoop-2.7.1 with a 4-node cluster (1-master & 3-slave) and that is working well. Now I want to install HBase on this system. ...
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40 views

How to ssh from XAMPP to local machine

This may be a strange/stupid question but I'm new to this sort of stuff! I was wondering if I can setup a ssh connection using keys between my XAMPP local server and my actual local machine? I need to ...
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35 views

Shutting down causes SSH keys to not work

Information When I shutdown or reboot my Ubuntu Server(16.04), logging in via ssh returns: Permission denied (publickey). So far, the only way to fix this has been to reset the permissions of ssh ...
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12 views

Dolphin + FISH + certificate

I'm trying to connect to a remote folder with Dolphin using fish protocol. I can correctly establish an SSH connection to the remote machine with the same user I'm using in fish connection string ...
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18 views

Connecting openssh

Is it possible to determine who can connect to your server based on its mac address? I would like to make my server safe as possible and determine that it can be connected only via my Android phone ...
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15 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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23 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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20 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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22 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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20 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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84 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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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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23 views

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. ...
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33 views

How do I pick a new name for a network interface?

Background I installed Ubuntu Server 16.04 inside Virtualbox 5.0.22. I'm attempting to set up SSH. I already have the SSH server installed on the guest, and am happy with the network interface set up ...
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52 views

Installing Xampp (or, Lampp) through SSH

I am pretty much new to the whole concept of Ubuntu and Linux as a whole. I've installed and had my server run php5 on my ubuntu 14.04 without problems as such. The issue arrise when I realised that I ...
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13 views

FTP Issues with 553 error: 14.04 on AWS running ISPConfig3

I have installed ISPConfig3 on an AWS server, using a 'Perfect Server' tutorial from HowToForge, and all seems well until I try and create a website. The server works, and a default config exists, but ...
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17 views

ssh to ipmi and logging data

I experienced the following situation, so if anyone can offer his/her help it will be appreciated. From a local server, I need to access the ipmi of remote servers, simultaneously. For that, I plan to ...
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20 views

How long should unattended-upgrades take?

I have ran sudo unattended-upgrades while SSH'd into a Ubuntu box forgetting the -d or -v flag, so it is almost entirely silent. My Ubuntu 14.04.3 LTS said that it had 175 security updates(!) and my ...
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50 views

l2tp gives error 410 on attempt to connect on VPN

I'm getting error 410 while trying to connect via L2TP. This error occurs very often, but sometimes I'm able to connect, which leads to a fact that I customized everything properly. I have Ubuntu 14....
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25 views

Allowing access from only a specific IP does not work

I would like to access port 22 (ssh) of a computer whose OS is Xubuntu 15 from a specific laptop with Windows 10 and external IP x.x.x.x using Putty via Internet (i.e., these computers are not in the ...
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49 views

Why is my ssh connection so slow?

There has been similar question been asked time ago, but has no answers. I noticed today that my connection with ssh to other computer on local network it was very slow. When typing in terminal the ...
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37 views

How to use lsof with SSH ControlPath?

I am extensively using SSH ControlPath and would like to use the lsof tool in order to check which process is keeping a ControlPath socket up and running. I am using OpenSSH_7.2p2 Ubuntu-4ubuntu1, ...
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47 views

Significant delay on ssh connections, after password input

I want to complain about Ubuntu 14.04, being slow at SSH connections. And this is happening only on Ubuntu, I didn't notice that in Debian, in which the connection is instant! Problem: There is a a ...
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34 views

Why my ssh command operates on my local machine?

I installed three Ubuntu 16.04 on my VMWare virtual machine software,they are master,slave1,slave2. I have installed ssh software on the three machines, and I Generated RSA Keys according to the ...
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32 views

need help debugging server networking

I have a basic headless Ubuntu 14.04 setup with mythtv (with ethernet attached HDHR silicon dust ASTC receiver), mysql, apache, and ssh. Everything was had been running pretty well for a long time, ...
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35 views

Why ubuntu 14.04 ssh slow after cuda 7.5 install?

I am working with a laptop which has GeForce GTX 980M The laptop is running a newly installed copy of Ubuntu 14.04 server. After I installed Ubuntu, the laptop behaved well. It responded to ssh ...