Networking :: How Does Ssh Remote Login Work
Feb 12, 2010
After reading up about ssh, I understand that it's a protocol used for sending encrypted data over a network. However, I don't understand what's going on when I login to my Ubuntu PC using ssh [over the network]. How does the ssh client application 'know' that it has to take input from one computer and pass it to the other?
EDIT; To put it another way, one could send a mp3 file over ssh right? So instead of the file, what tell the ssh client that the input and output of the computers is what has to be sent?
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Jan 11, 2010
F12 64bit
Debian 5.0 64bit
Openssh
Both openssh-server and open-clients are running on 2 boxes. On F12 it is named openssh-clients but on Debian 5.0 openssh-client without "s".
1)As root both boxes can connect remotely another box.
2)As user both boxes can't connect remotely another box.
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Apr 14, 2009
I am using VNC to login to remote machine (vncserver). My question is; How can I login to remote machine (vncserver) through VNC client, without having to login to vncserver first physical. For better explanation here is an example: If john wnat to login to vncserver remotely first he has to login the vncserver physically then he can login remotely.
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Dec 29, 2010
I'm setting up an Ubuntu 10.04 system; installed open-ssh. I'll call this box A. I also have an older box B with Debian. From A I can log into B via the usual way (ssh <user>@<IP>). The 1st attempt at this I was presented with the 'unknown host' warnings & elected to accept it. However, from B when I try logging into A there is no response at all -- no warnings, nothing. I have to ctrl-C back to the prompt. I can successfully ping A from B though. I CAN connect to A from a Windows box using PuTTY as an ssh client with all default settings. Once connected I can log in. Why no response from A when trying to log in from B?
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Feb 17, 2010
I have 2 computers with kubuntu 8.10 using vinagre for my remote desktop viewer and x11nc for my server and I am trying to connect remotely through the command line from one computer to login to the startup screen in the other computer. Is this possible, since it looks like my server does not start until after I log in to my desktop screen?
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Jul 27, 2011
I am interested learning about networks in Linux and prefer to use Ubuntu. I hope the title is reflects what I really need to know. If not sorry about that.I have an requirement, it is to have a server to handle authenticaition of users so generally users can use that server to use specific services such as login (to linux), mail (postfix) and perhaps a file server (to hold user data, lets say what we have on /home/[username])I did some reading, and it looks like I will need LDAP and Kerberos. But I couldn't get a good understanding on how to practically deploy such a service.I would be obliged if some you guys can give me some guidelines on how to achieve my goal. Topics I need to read, books I could refer would be a plus.To tell you some thing about me, I am not a *NIX guy, my knowledge is kinda just above basic.
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Feb 6, 2011
I maintain plain vanilla Ubuntu 10.04 systems for several friends. Each machine has only one user, the owner. I use Remote Desktop to instruct and to perform maintenance. Here's my problem:After updating the system, if the kernel has changed, a restart is needed. If I do a restart, I then have to phone the owner to insert his login credentials in the gdm login screen, before I can do anything else via Remote Desktop on that machine.There ought to be a simple way I can avoid the phone call and login myself.
I'd strongly prefer not to use any software that is not included in a plain vanilla Ubuntu 10.04 installation. And I don't want to weaken system security beyond what it is now.Is there a solution? Or, what is the simplest solution?
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Sep 18, 2010
I have Lynx, trying to connect to a tightvnc server on a Win7 box on my LAN.
Server IP: 192.168.1.42:5900
The remote desktop window just goes black and pops up a dialog saying connection closed every time.However VNC works fine as I installed xtightvncviewer as an alternative and that connects, and I can view the Win7 desktop and control it and do everything you would expect.
I've also tried connecting using Android VNC viewer from my phone on my LAN and that also works fine so it appears to be an issue with Remote Desktop Viewer.Incidentally using R.D.V. on Intrepid into a tightvnc server on my old XP box worked fine.
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Jun 2, 2010
i'm using OpenSuSE 11.2 and was wondering if there is anyway to set remote login as the default login method.
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Dec 3, 2010
I am at a loss. I can not access my work remote desktop via the terminal server client on my wired box running Ubuntu 10.10. My wireless laptop is able to connect right away once I established the VPN connection. The VPN connection is established on both boxes with no problems.
When I tried the Terminal Server Client on my wired boxed, it says it can not establish a connection. Yet my wireless box gets connected immediately!
I check the /etc/dhcp3/dhclient.conf and the /etc/resolv.conf to see if there were any differences, but they are essentially the same. When I have the vpnc connection, they both recognize it and I am able to ping the IP address shown when I do a "ifconfig" on the terminal.
What can be the problem? Anything I need to configure on a wired computer versus a wireless one? What else can I check?
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Feb 15, 2010
My computer was working this morning and both hard drives were working fine, then all of a sudden for about two hours I was stuck with this "problem", then after fumbling and moving and stablizing things, then Windows works? See below for details. I've finally reinstalled both hard drives, but the one with the Linux partition doesn't work: it says nothing is discovered on the disk. I can't login at the LUKS login after grub starts, therefore I can't get into Linux, but Windows works?! I used to be able to go directly into Grub when the computer starts, I forgot how to do that but it doesn't matter. If you need details I'd be glad to provide them. I just wondered why Linux doesn't work, but Windows does. I have Linux & Windows on two different separate hard drives
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Jun 16, 2010
I just installed 10.04. I currently have a monitor but I want to ditch this and use a VNC client to do what I need to on my server. Here is the process I'm using:
1) Remote login via SSH from another computer
2) Once logged in, I run 'service gdm start' to start up GNOME
3) I have the login set to automatically login in with my user account
At this point I thought I was home free and I could connect via VNC, but now I'm getting a prompt for a keyring unlock, as explained here: [URL]..This has been a total pain.
1) Are there any other simple solutions out there so that I can remotely log in and be able to connect to my server via VNC?
2) If not, how do I get past this keyring issue?
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Feb 28, 2011
I have two systems both having ubuntu 10.10 I want to know how to remote login from one system to other in GUI. What packages I have to install ?
I know remote login using ssh but its CUI.
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Mar 21, 2011
I use openSuse 11.3 and when I try to log in to my PC from a different computer it does not allow me. I used to use openSuse 11.2 and was having the same problem. what I need to do to maybe change the firewall security or something like that..
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Apr 20, 2010
Is there a way to remotely login to a Linux machine from Windows without having to have a session already going? The ideal situation would be to turn the Linux machine on, remotely log in with the Linux username and password and be presented with a desktop, and when I disconnect the session ends. I don't want to have a session already going to connect to... it seems like I can't accomplish this using VNC. What other options are there?
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Mar 14, 2011
Is it possible to remote login (x -session) to a second computer( first time) from a first computer.
OS : Ubuntu 10.10
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Aug 22, 2011
how to use remote services to login to a remote machine without providing the password?
Are there any commands in Linux or do I have to write a 'C' code for it ?
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Nov 14, 2010
I did a upgrade to 10.04 on my server. Then after a reboot I was unable to remotely get into server. Upon connecting the monitor I am greeted with the purple 10.04 boot screen with this text at the bottom:
Code:
The disk drive for /dev/mapper/cryptswap1 is not ready yet or not present
Continue to wait; or Press S to skip mounting or M for manual recovery
Now I did some googling and the results I came across involved a encrypted drive which I have never even tried to setup. Now if I choose a manual recovery I am dropped to cli which from there I can start networking then ssh into the system and run updates, ping other machines, etc. But again this is meant to be a remote access server so everytime I reboot I cant just hit the M key let alone run service networking start! So I commented out the swap entry's in both my /etc/crypttab and /etc/fstab...now I cannot even get to terminal as I could before...now it just loops with no errors!
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Nov 29, 2010
how can i write a script to login to a remote pc with ssh by integrating password inside the script?
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Mar 28, 2011
I need to remotely Ubuntu 10.10 server. However I want to do it froma Windows XP VISTA or Windows 7 machine. Ideall I would like to login using http web browser. The primary reason is because I want to be able to update the server software remotely when required. Ofcourse it would be nice to see the GUI and be able.10 to perform all functions as if I was sitting at the computer. I heard of webmin.... or webadmin... However I have not find this software in the Ubuntu Software Centre and I would like it to be good for Ubuntu 10.10.
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Apr 6, 2011
I have my work PC in the office, and time to time I access it via TeamViewer from home. I have access to it also via ssh, over the VPN connection. I have problems with this setup, when for some reason the work PC must be rebooted (or it just happened by itself - power failure). The Ubuntu gets to the login screen and that's it. I can not access it remotely because the TeamViewer application is not started on that PC yet. I'd like to know, if there is a way how I can access my work PC over the VPN connection - open SSH session, and write some commands, to log in that desktop environment user, and launch the TeamViewer application. Ie, if someone would be looking on the screen at that moment, she would see that login screen disappears, desktop environment is loaded, and the TeamViewer app is started.
If that's not possible, then, I guess, I'll have resort to some alternative remote access tool (ie, VNC) what could be loaded before the Ubuntu login screen is shown. Then I could access it over the VPN connection, using appropriate client.
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Aug 13, 2011
I have a PC running Ubuntu 10.04 with vino to share the desktop. After I login to the PC I can connect to it from another PC (again 10.04) with the vinagre Remote Desktop Viewer. Canonical has made this rather easy to configure. However, I cannot connect to the remote PC and use the Desktop Viewer to login to the remote PC.
Short of ripping out vino and installing vnc or tightvnc is there a way to configure Ubuntu's desktop sharing to allow me to connect to the remote PC and then login?
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Mar 9, 2010
is ssh remote login similar to hacking?
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Feb 14, 2011
I need to be able to login to my brother's comp, which is in another place quite far away from mine, and help him install some softwares and get some settings done for him, as he's more a newbie than me, but has been only able to install ubuntu successfully. He has a broadband connection and I have one too. I have used ssh over Lan and have been successful in this regard. From my understanding of the manual page, i don't think I can use ssh over two different networks. Which similar command/package will work for me if I want to login to his comp and execute commands as easily as I can do using ssh for two computers on the same network.
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Apr 25, 2010
Is it possible to have multiple passwords on the same account, where one password allows only normal login and another only when accessing the machine remotely (for example, via ssh)?
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Feb 25, 2011
I want to disable the remote login for particular user id in linux server.
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May 25, 2011
I have just setup a debian box, and I want to be able to login to the machine remotely.Currently I have the following setup:Cable Modem -> Netgear Router (DHCP to outside world) -> Debian Box (DHCP for internal network)As I under stand it I have to set my Debian Box to use a static IP, but from there I di not know where to go.Also since my cable modem IP is dynamic, is there some way to have that the debian box get the IP address for the outside world, and e-mail it to my gmail account when it changes, or least every X hours?
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Apr 4, 2009
Remote root login is enabled. How do I disable this
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Apr 21, 2010
I recently configured a server that I would like to access remotely. I want to start x through ssh and then log in through vnc, but I get prompted to type in my password in gnome before I have a change to login. Which is a problem because you need to be at the box to enter the password. Is there a way to authenticate this through ssh or give vnc automatic keychain access?
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Feb 5, 2011
I had an old SuSE installation (v9 or 10, I forget) on which I used to remotely login to a kde session using xdmcp. I blew this away and installed 11.3, and I just can't get it to work. I'm pretty sure I've enabled all the things I should have. there a bug?(Incidentally, I had the same problem with Ubuntu 10.10 (with Gnome), and eventually found I needed an updated version of gdm. With X tunneled through a PuTTy ssh session I can display individual X windows no probs. Also, a VNC session is rejected out of hand.)
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