Ubuntu Servers :: One NIS User Can't Login To Workstation To Another
Mar 10, 2011
network in my lab is running NIS and NFS. one of our workstations (say, workstation A) died, so we replaced it with a new computer. A user emailed me saying that he can't login to the new workstation A. I instructed him to do:
mv ~/.ssh/known_hosts ~/.ssh/known_hosts_old
He did it, and then got back to me with the following message:
===========starting user's email=====================
Starting from my login to Workstation B, this is what I get:
% mv ~/.ssh/known_hosts ~/.ssh/known_host_old
% WORKSTATIONA
The authenticity of host 'WORKSTATIONA)' can't be established.
RSA key fingerprint is c2:b9:d9:64:b3:03:f2:bc:2d:4f:7c:4f:c7:cb:2f:b6.
[code]....
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Feb 27, 2011
I am running Ubuntu server with an SSH server installed. How can I create an ubuntu user and give that user permissions to read and write only 1 specific folder so someone can log in through SSH using the new username and only put files in the folder I specify?
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Apr 5, 2011
I'm using openldap(slapd) to store user account..But how can i ensure that each UserID can be only login on one machine at any one time?
I'm using ubuntu for both client and server..
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Jul 5, 2011
I have a Samba server and it works except other users can't connect to it. The admin account can connect to the share fine but when I add other users they can't connect.These are the commands I used to make and add users
Code:
useradd -s /bin/true
smbpasswd -a USER_NAME
[code]....
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Jan 15, 2011
I have a web server running Ubuntu Maverick Server Edition. I changed the /etc/motd file to something custom (some awesome ASCII art). This changes the login for every single user on the entire system. My question is this: Is there a way to change that login file and make it different for each user or is that the only file and it can only be done system-wide.
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Jun 28, 2011
I wrote a little script that will automatically mount two Samba shares to my home directory and I was wondering if a) You guys/gals had any input as to how I could improve on this script and b) Tell me how I would go about having this script automatically execute when I log on via SSH.
Code:
#!/bin/sh
mount -t smbfs -o username=Myuser,password=Thepassword //192.168.1.102/Data1 /home/user/Data1
mount -t smbfs -o username=Myuser,password=Thepassword //192.168.1.102/Data2 /home/user/Data2
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Jun 10, 2009
Senario is we have a system where root has authorised keys set up so that it can do a passwordless ssh to $WORKSTATION. I then need to run a script on $WORKSTATION as user "bob" and NOT as user "root". I do not want to set up user "bob" to be allowed passwordless ssh so any ideas how I can do this?I have tried variations of (as user "root"):ssh $WORKSTATION "su - bob; ./my_script"
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Jan 11, 2011
I have a truly freakish thing happening here. First I'll start with a general map:
Workstation A (10.10.0.100) - Ubuntu 10.10 joined to mydomain.local via likewise-open
Workstation B (10.10.0.101) - Ubuntu 10.10 joined to mydomain.local via likewise-open
Workstation C (10.10.0.102) - Ubuntu 10.10 NOT joined to any domain
Server A (10.10.0.1) - Windows 2003 AD Server on mydomain.local
Server B (10.20.0.1) - Ubuntu 10.10 joined to otherdomain.remote
As you can see I've successfully installed likewise and I've been able to get SUCCESS notifications from the join. I've been able to log in locally with a domain user and use a domain user password. I've also added a special Group in AD for linuxadmins and then added that to my /etc/sudoers file so I can sudo from a Domain Account. Great right? I'm slowly replacing Windows. But there's a hitch:
I can't SSH from machine to machine! but it's still not quite that simple.
I can SSH from Workstation A to Workstation C as a Domain User.
I can SSH(Putty) from Server A to Workstation A and B as a Domain User.
I can SSH from Server B to Workstation C as an alternate Domain User.
I can't SSH from Workstation A to Workstation B as a Domain User.
I can SSH from Workstation A to Workstation B as a Local User.
I can SSH from Workstation B to Workstation A as a Local User.
I can't SSH from Workstation B to Workstation A as a Domain User.
Complicated enough for you? The simple version is that if it's joined to the domain I can't ssh into another machine that's also joined to the domain while I'm a domain user. But give me a local account and it's as if there's not problem. I tried looking through the logs to find something but wasn't about to find a "sshd" type log. Syslog was completely unhelpful as it doesn't really show anything for the time stamps of my connections. Where does one start troubleshooting this?
I thought it might be a groups thing like the sudoers file, but I don't have an ssh or sshd group. Oh and what does SSH do? What's the error it throws?
Code:
MYDOMAINdomainadmin@workstationa:/$ ssh mydomain\domainadmin@workstationB
The authenticity of host 'WorkstationB (10.10.0.101)' can't be established.
RSA key fingerprint is OB:SC:UR:ED:FR:OM:YO:UF:OR:PR:IV:AC:YR:EA:LL:Y!.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'WorkstationB,10.10.0.101' (RSA) to the list of known hosts.
Here it waits for exactly 120 seconds and then...
Code:
Connection closed by 10.10.0.101
What can I do?
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Jan 4, 2009
I am using Exceed (the hummingbird) as an X emulator on my PC, I have X11 forwarding turned on in putty, and I have the DISPLAY environment variable set to the PC IP address + , like so DISPLAY=192.168.100.11:0. When I type startx, however, the Xsession starts at the console. How can I get it to come up on the PC?
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Apr 29, 2010
I have linux workstation. All users home directories are NFS mounts.
Since I am facing packet loss issue users are unable to login to the workstation.
I found the packet loss using mtr from workstation to filer.
Matt's traceroute [v0.54]
Hostname
What are the things I have to check to resolve this packet loss.
Following is the ethtool out put of the workstation
Settings for eth0:
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Dec 9, 2010
My server is running Ubuntu. I have no problem adding a windows XP to the domain. I however have a problem with windows 7 laptop. I keep getting the following error
"The user could not be added because the following error has occurred:
The trust relationship between this workstation and the primary domain failed".
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Jan 13, 2011
I have just installed Ubuntu 10.04 Server on my HP z800 workstation with intel Xeon processor.Installation is fine but monitor goes to sleep mode on boot up.
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May 22, 2009
I am currently working on a Diskless Fedora10 based PXE image that should auto login and then launch the ICA client without launching the desktop (so normal autostart will not cut it)I have got the image up and running, the clients boot correctly, autologin etc, but still launch KDE, and I was hoping replace the desktop with the ICA Client.
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Dec 14, 2010
I'm seeing really bad user login format under a standard installation and am wondering why ubuntu does this as default. I have noticed that the graphical login for gnome sizes itself to accommodate a user's exact password length. This indicates to me that somewhere on the unencrypted part of a standard installation with user encryption contains at least some indication of the content of the password length which seems a security flaw even if not a complete hole, it majorly reduces the number of attempts a cracker would have to cycle through.
And that's assuming that *only* the length is contained. Furthermore it seems that it would be MUCH better to simply display the number of characters entered into the pw field and allowing the gui to expand itself from an fixed size as the field is filled out so the the user still receives visual feedback for entering characters. Either a simple character count display should be entered into the field or a 10 dot to new line so that one can visually quickly count the number enter by multiplying from a 10base graphical observation.
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Dec 11, 2009
I am using the sudo command to log on locally as another user by the following command:
sudo -u theotheruser -s
or
sudo -u theotheruser sh
As I see it, this initiates a new shell with the mentioned other user.However, this doesn't load that users profile from his home directory.Is there a way to automatically read the users profile when login in with selected command? I am mostely interested in getting a working prompt when logged in.
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Jun 3, 2011
yesterday I updated my fedora 13 to fedora 14 (on laptop) and today i cannot log in on user. It just go blank for a sec and is back to login.
At text console (alt+ctr+f2/f3) i enter my username and pass it give this for a sec and resets (clean) console
username: Name
password:
last used: [date]
login: no shell permission denied
i used unetbootin (fedora 14 netinstall to update) and later i updated 1,5G before reboot (did update that fix, forgot its name tho :s)
I would most likely reinstall everything, but i have some work at laptop and as death-line is near, i would prefer to fix it if possible.
edited:
i have installed F13 on unused space, is there a way for me to access and fix it? or at least get some files from there?
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Oct 29, 2010
Im trying to limit the diskspace users on the system may consume, and i found quotas (im a total linux noob). But when i try to set it, no matter what i set it to the maximus is 2 GB. Now... i need quite a lot more than that. One user should be able to use 1900 GB and the other 600 GB. How can i fix this? Im using ubuntu server 10.04.
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Apr 18, 2011
I have a problem regarding the ubuntu enterprise cloud. I have installed CC,CLC,SC,NC and a client and logged into thje user interface using my browser for the first time with bith username and passwd as admin and downloaded the credentials.But now as I try to login with the same username and passwd, it says that its an invalid login. I understand we have to change the password on the first login but i don't remember doing the same.
I tried recover password option and gave the user name as admin and email address as my gmail id. It says that I have to follow the instructions sent to the mail, but there is no mail sent I have done it like 5 or 6 times with different mail ids
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Jul 13, 2010
I'm hosting a server with Ubuntu 10.04. I've stumbled upon a strange problem.The server seems to refuse any login attempts, either with SSH or via a TTY after a reboot. After a couple of minutes (about 10 minutes or so) I able to login. The memory usage isn't high at login nor the system load. The auth.log doesn't show any login attempt before.problem? Or does anybody have a suggestion I could try to fix this?
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Dec 11, 2010
Is it possible "reset" all (X, GDM related) permissions/settings of one user? What would cause one specific user not to be able to log into anything via gdm/the login screen? After providing the proper password, the screen goes black and then jumps back to the login screen. No session alternative works, not even xterm or gnome failsafe. I can however log in via the console (Ctrl+Alt+F6, recovery etc). With another user I can log in via GDM just fine, and deleting and re-adding the "broken" user doesn't make any difference.
Some (maybe) relevent logs:
part of syslog:
Quote:
Dec 12 01:20:58 <specific user> pulseaudio[1358]: core-util.c: Home directory /etc/timidity not ours.
Dec 12 01:20:58 <specific user> pulseaudio[1358]: lock-autospawn.c: Cannot access autospawn lock.
[code]....
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Aug 8, 2010
I have a network set up that has been working for around a year with no problems but has now developed a login problem. The system was set up with a main server with all users on it and another PC located elsewhere that people could log onto using there personal login and password that then gained access to the account on the main server. This remote PC has now got the problem. When you try to log onto an account it comes up with the message "your session has lasted less than 10 seconds. If you have not logged out yourself this could mean there is a installation problem or that you are out of disk space."
Error message says that no profile for the user can be found and it couldnt create per-user gnome configuration directory. I can log on as root onto the remote PC as it is obviously a local account but all the account on the main server are not accessible. From the root account I can see that the connection to the server is OK and I can actually log into the accounts on the server using the failsafe session so the physical network is OK.
I never built or designed this set up and to be honest I normally work with windows so its all a bit strange to me. Both PC's run Centos 5. I have checked the messages log and there doesnt seem to be any indication of a problem. Just that it stopped connecting from the remote PC. The accounts are all active on the main server itself and have no problems being accessed.
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Jun 30, 2010
I am currently in a project to set up an LTSP server with 10 thin clients. I am using Ubuntu 9.10 (Karmic).
Installing server and booting clients are working fine. Now, according to the need, I have to restrict user session numbers and allow resuming previous user session.
I have achieved to do the first one, but still could not able to setup the second one. As per requirement, if some thin can have power failure, the same session should be restored back. I am confused here, if I need to focus on saving xsessions or saving gnome sessions. I am looking for a concrete solution as I am running out of time.
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May 30, 2011
After a hard restart (xubuntu 11.4) I found that when attempting to login at the standard splash, it would flash vterm7 (the logs from boot, with some new stuff added, none of which looks unusual) and kick me back out to the login screen. I can login on a vterm and in a recovery console, but not into xfce session or xubuntu session.
I have tried removing ~/.cache/xfce4 and ~/.config/xfce4 along with ~/.cache/sessions.
I made a new user and can login to xubuntu under their name.
Restarting gdm, or doing service gdm stop and startx don't work.
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Apr 9, 2011
I like the server login information that gets displayed when you login to a 10.04 server. It lists disk usage, CPU usage, Temperature etc...
Unfortunately I had problems installing 10.04 from a USB. At the end of the process the master boot record was stored on the USB and not the hard disk.
But now when I login to my server I don't get the server information.
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May 26, 2010
how i know am in root user or another user? how to login as root user? sudo passwd root when i typed in termninal am getting this error pa1 is not in the sudoers file.
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Feb 23, 2011
I made a clean install of 10.10 on an oldish desktop someone gave me. But after the first update, I can not login to the desktop environment.e login screen shows no user accounts, but other than that appears normal (purple background, ubuntu logo in white box mid-screen, and the options to shutdown, etc on the bottom bar). The mouse works, however the pc will not shut down nor restart from the on-screen commands.
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Mar 27, 2011
Running 10.10. Had one user and now wanted to add a second user.Added the user and a password, disabled auto-logon and set system to show the list of users. Upon reboot, I get the list of two users and 'Other...'. Clicking any of this just loops back to the same screen
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May 2, 2011
I was eager to try GNOME 3 in Ubuntu 11.04 (because I wasn't very satisfied with Unity, like almost everybody around) so I installed it using this guide:http://news.softpedia.com/news/How-t...4-194085.shtmlAfter rebooting the system (to finish the installation), I've got an error message while trying to login:Quote:Could not update ICEauthority file /home/<username>/.ICEauthorityI've googled for some time and found different 'solutions', however none of them seems to be working.What can be done with a system like this? I'm not able to login, how can I downgrade the system?
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May 2, 2011
After my last upgrade from 10.? to 10? my users' (kids) were unable to login. I tried to fix it and could not find anything wrong. Now I have upgraded to 11.? and the problem persists. The users could still login by selecting an older version at the prompt during boot up.
I deleted there account and reinstall the user and still they could not login. I added a completely new test user and could not log that one in either. The system excepts the password, waits a several seconds, then the mouse curser changes to the spinning circle. The hard drive lights flash for many seconds then eventually the hard drive stops flashing. I have let it sit a long time and it never continues. Tonight I came home tried to login and it is doing the same thing to me tonight. I ran fix packages, fix grub and everything else I could think of and could not log in.
Finally I logged in to the oldest version on there and it let me in.? The screens are all the same but the desk top is entirely different? I have never seen one like this. I think its like the new version of fire fox, with every thing moved around. Icons down the side. Menu's hidden at the top? I can probably get used to that but I need to able to login, and my user's to login?
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Feb 11, 2010
I know this is not something that's usually done, but how do I stop a service like Apache only when I log on my user account?
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