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

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SSH connection trough NO-IP refused

I'm running a little server at my home. As you can imagine, my IP address is dynamic. In order to get a static hostname, I'm using the services of noip.com; I've created a hostname in the website and ...
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56 views

SSH Into Local Machine Over WiFi and Access To Internet

I have two computers (running Ubuntu 14.04) connected to a home wireless router. I want to login to my laptop, from my desktop, while at home using SSH. Normally I set my laptop to connect to my ...
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0answers
24 views

How to Show History of Port State/Activity?

Let's say I have an open port on my PC like 6789. I use this port for a special purpose. But, suddenly I found the port 6789 is not listed in netstat -ntlp (port closed). How can I see the history of ...
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1answer
53 views

Can I set a computer name alias for ssh connection?

I work with several ubuntu servers and I connect to them from my mac by terminal (ssh). On normal workdays I have up to 10 terminal windows running to distinct servers. The problem is that I easily ...
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76 views

Randomly refused ssh, xrdp, vnc connections in Ubuntu 14.04.4 server

its my fist post in this awesome forum. Im having a problem in a dedicated HP proliant server with a fresh Ubuntu 14.04.4 installed. I dont know why it seens to randomly refuse all attempts of ...
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84 views

SSH connections cause memory leak in kernfs

I have an issue with my Ubuntu system where memory is leaked each time an ssh connection is opened and closed. I found that the root cause is that after an ssh connection nodes are created and left ...
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2answers
44 views

Cannot delete /etc/init/ssh.override file from ubuntu touch

I have installed Ubuntu Touch on Nexus 4, and I am loving it. I want to ssh into my phone using password, so I would like to delete the ssh override file, which is /etc/init/ssh.override However, the ...
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1answer
40 views

Large number of ssh failures in message log?

I just looked at the message log vi var/log/message2 I am getting a huge number of failed ssh attempts from China, e.g. Mar 27 06:30:42 xxx sshd[10628]: PAM 2 more authentication failures; ...
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1answer
100 views

ssh: connect to host myhostname.ddns.net port 22: Connection refused

I have recently setup a local machine and a laptop, using noip.com, so that I can access the local (host) machine, via my laptop whilst I'm away on a trip - see my previous question here Everything ...
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0answers
45 views

Ubuntu-sdk does not connect to emulator or emulator does not boot properly

I'm trying to learn how to make scopes using the ubuntu-sdk. However, I can't make the emulator work properly, so I can test my work. When I run the scope, the SDK/QT-Creator launches an emulator. ...
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0answers
51 views

fail2ban: how to immediately ban those who attempt ssh userid logins

My OpenSSH server is set up to only allow key based logins. I get many attacks each day from bots trying to login using a userid and password. I have fail2ban configured and running already. How can I ...
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1answer
52 views

Issues with grub menu timeout

I recently installed xubuntu 14.04 on my desktop. The desktop has only one drive containing xubuntu, and I often restart the machine from ssh using the command sudo reboot now. However, every other ...
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1answer
63 views

UFW rule doesn't work

At first enable the ufw status. root@sai:~# ufw status Status: active It blocks both incoming and outgoing connections, tested by using ping ssh from both sides not working. root@sai:~# ping 192....
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0answers
26 views

Restricted logins to a specific IP address, seems my IP has changed and now I can't log in. Any way around this?

So I have a dedicated server from Kimsufi.com running Ubuntu 12.04 and I had restricted logins to a specific IP using AllowUsers in the sshd_config file. I restricted all account logins on my dedi to ...
3
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2answers
54 views

Why is /etc/default/locale not sourced at login via ssh?

I'm not a newbie, yet I've been battling this apparently easy issue for a while. I know how to work around it using /etc/environment or other tricks but I want the vars in /etc/default/locale to work ....
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0answers
111 views

SSH to Beaglebone Black is not successful sometimes

I have the latest version of UBUNTU installed on my computer and the latest version of Debian on my BBB. No problem using puTTY to connect my Windows machines (10, 8, even 7), but when I try using SSH ...
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0answers
23 views

Saving X11 when logging in another account

My problem is I can't use Graphical X11 when I go to other user account through sudo su - some_user. So, firstly I connect to the remote host using the following command: ssh user1@host -P port -X -...
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3answers
2k views

What is wrong in my SSH key generation?

I'm trying to generate a new SSH key: $ ssh-keygen -t rsa -C "newkey" Generating public/private rsa key pair. Enter file in which to save the key (/home/z/.ssh/id_rsa): newkey Enter passphrase (empty ...
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1answer
25 views

Running AWS EC2 [closed]

have a trouble with connecting to ubuntu instance in AWS EC2. Connect through SSH client, but there is an error: port 22: no route to host. How i can solve that problem?
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1answer
53 views

Is it possible to ssh between two different network?

Thanks in advance. Do I want to know that,how can we ssh between two different networks? Scenario: My home PC IP : 192.168.1.106 Home public IP: XXX.YYY.ZZZ.254 My office PC IP: 192.168.10.130 ...
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5answers
197 views

Editing files on server through SSH

I'm working on a web application and all of it's files are on a linux server, which I am accessing through SSH. Is there a way to edit these files in a text editor other than vim or nano through SSH, ...
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2answers
94 views

Can't boot Snappy from SD card on Beaglebone Black!

I've downloaded snappy image to Beaglebone Black: ubuntu-15.04-snappy-armhf-bbb.img.xz. I wrote the image to an SD card, I booted Beaglebone from the SD card, but I can't find the Beaglebone in my ...
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0answers
38 views

SSH Raspbian(Pi ) using Ubuntu 15.10

I am trying to SSH the raspberry pi using terminal. i have gone to the cmdline.txt file in the pi boot folder and added ip=192.168.1.20 (Same subnet as laptop IP) I saw the ip adress in system ...
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1answer
39 views

I set “PubkeyAuthentication” to no and I am locked out

I am not very familiar with ssh and I am afraid I made a disastrous mistake. There is an old server which used public key authentication. My public key was in the authorized keys, so I was able to ...
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5answers
6k views

How did SSH connect without Internet?

I have a WiFi router, connected by Ethernet cable to my Ubuntu desktop and Android mobile. I have sshd set up. The telephone-line-in cable to the router was cut. But both devices were still connected ...
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2answers
1k views

How to securely ssh into a machine at home over the internet

I will be travelling shortly, and I have a machine that run runs a bunch of cron jobs etc. I need to log in remotely to check the results of the jobs run and to do some work on the machine. Here are ...
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0answers
34 views

Ubuntu server in VirtualBox: no connection to host

For an assignment I need to host 2 websites using nginx. The default page worked yesterday, now it doesn't (I haven't changed anything significant though) and I also can't open an SSH connection ...
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1answer
60 views

Ubuntu Desktop as a server. Should I uninstall the GUI? And if, how?

I'm running an Ubuntu 14.04 Desktop version as a LAMP server. Is a big difference between efficiency when the GNOME desktop environment is running? or it is better that I remove desktop and use only ...
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2answers
40 views

juju ssh public key issue

I have two machines on which one is running a postgresql charm and other is running the charm I'm working on. Now I need to ssh into the postgresql machine to run some database migration scripts. For ...
3
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1answer
24 views

Implications of manual server time change

I am running a web server on ubuntu 14.04 (nginx as a proxy for a node application, as well as a go application daemonized using supervisor). I would like to know the implications of manually changing ...
0
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1answer
29 views

ssh server unaccessible

I have an ubuntu server (as a NAS) at home. I use an always-on Raspberry Pi to turn the server on when I need it (WakeOnLan). Both the server and the Pi are accessible via the local network. My ...
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1answer
39 views

SFTP access to other folders

My current server setup with 14.04 includes OpenSSH with SFTP configured: Subsystem sftp internal-sftp Match group ftpaccess ChrootDirectory /mnt/earth/www X11Forwarding no AllowTcpForwarding no ...
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22 views

openconnect: connection destroyed after ls and unable to use sftp

In the past I have used Cisco AnyConnect under Mac OS to connect to a remote system at my uni. This worked perfectly. Now I wish to do the same thing under Ubuntu 14.04, however Cisco AnyConnect has ...
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1answer
81 views

open ssh connection in background [duplicate]

I've looked at a lot of similar questions about this but haven't found anything to solve my issue. I would like to be able to open an ssh connection to my university's server and keep the connection ...
0
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1answer
49 views

Attempt of apt-get install sftp fails with : E: Package 'sftp' has no installation candidate

magnus@mt-dell:~$ sudo apt-get install sftp [sudo] password for magnus: Reading package lists... Done Building dependency tree Reading state information... Done Package sftp is not available, ...
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2answers
44 views

how to prevent people from using ssh from a machine, but allow ssh in

Somehow a user has been gaining access to my server. I have blocked ssh for all but a few users I trust and who absolutely need ssh access (used AllowUsers in sshd_config). In the event that one of ...
0
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1answer
31 views

SSH locked out need to put files onto server

Okay this is my last hope I have a server which i am locked out on because we were testing some different host files in the /etc/ssh folder. I am trying to get my back up onto the server so that i ...
0
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2answers
115 views

how to turn off password-less login for ssh?

I had setup password-less SSH login from my desktop to my laptop following the steps here. Now I want to turn off the password-less login so that when I ssh from my desktop to my laptop, it will ask ...
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47 views

Troubleshooting Ubuntu via Remote Terminal

In a situation where an unscheduled system reboot occurred on an Ubuntu environment and the only way to access the device is via Remote Terminal. What are some of the things you would ...
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1answer
744 views

How to enable indirect GLX contexts (+iglx) in Ubuntu 14.04 LTS with nvidia gfx-cards

I am running a linux-host for Qt-software-development at a central place. With my windows box I use Xming as a local X-server and putty to connect to that linux-host. With this configuration I can ...
0
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1answer
110 views

iptables and hacker prevention

Hello fellow Ubuntuers! here is an example of my iptables.rules file: *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :f2b-sshd - [0:0] :f2b-sshd-ddos - [0:0] -A INPUT -p tcp -...
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19 views

Remote connect OpenVPN

I've got an Ubuntu server running at home, and it's connected to a OpenVPN server. The OpenVPN remote address is 176.126.237.214, with port 25000. This tunnel connection changes my public IP to a IP ...
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0answers
62 views

Can't log into Ubuntu 15.10 Server using SSH

SSH works great on my server -- except when I try to log on as anybody other than the first user I created. I have tried adding an AllowGroups line to the sshd_config file, but the default for ssh ...
0
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1answer
46 views

How to create new user with Public key authentication?

I have Ubuntu Server 14.04 LTS. I have Public key authentication enabled by default. I used the following command to create new user: sudo useradd -m -c "John T." john -s /bin/bash The command ...
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2answers
159 views

Running command in a new bash shell process

I have looked around as I would've thought this would be a rather common question, but nothing seems to be working for me. Basically I'm trying to SSH into a device (Raspberry Pi) to run a process. ...
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96 views

Why does remote SSH connection time out?

My server runs Ubuntu Server 14.04. When connecting over SSH from a local LAN client it works fine. When I connect using a different machine from an outside network, I get 'connection timed out'. I ...
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1answer
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ssh Help logging to remote VMware

http://imgur.com/PLCiwWh Can anyone help me figure out that I am doing wrong here? I am trying to remotely login to another virtual machine.
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32 views

Can't SSH in as root from windows machine to connect Ubuntu 15 running on VM

I'm using the default installation of openssh-server for my ubuntu-15.10-desktop-i386.iso running on VM. I can connect through the console as root like normal, with my username and password. When I ...
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1answer
197 views

How can I repair gnome-keyring to unlock my SSH keys automatically after login?

It looks like some recent package updates broke some functionality of gnome-keyring. When using SSH from the terminal it asks me for the password of my SSH private key. Previously the key was unlocked ...
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2answers
168 views

ssh-add permanently a key without asking passphrase

I have a private key with a passphrase And I have 2 computers running Ubuntu 14.04 On the first I added the key using ssh-add ~/.ssh/id_rsa It asked me the passphrase, and it was added permanently. ...