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• How to check sshd log?

  - by Eye of Hell

  Hello. I have Ubuntu 9.10 installed with sshd and i can successfully connect to it using login and password. I have configured an RSA key login and now have "Server refused our key" as expected. Ok, now i want to check sshd log in order to fingure out a problem. I have examined /etc/ssh/sshd_config and it have SyslogFacility AUTH LogLevel INFO Ok. I'm looking at /var/log/auth.log and... it's empty O_O. Changing Loglevel to VERBOSE helps nothing - auth.log is still empty. Any hints how i can check sshd log?

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• OS specific network delay, why?

  - by Atilla Filiz

  Since my new ISP installed their own router to my house(I rented a room in a student house so don't have much control on these), I started having strange delays. Any outgoing connection I do, be it http or ssh, is delayed for several seconds, and once it is established, I have no further problems. I open several simultaneous tabs in my browser and after about 5 to 8 seconds, they all connect and load simultaneously and quiet fast. I can actually play online games once I connect.What's more interesting is, I experience this only with Linux distros, namely Arch and some versions of Ubuntu. Access with Windows installs are quiet normal. What might be wrong with my router? Everything was fine with my old router but I have to use this one now.

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• gitosis always asks for git password

  - by Cylindric

  I've just followed the simple gitosis install instructions on an Ubuntu server, such as these http://blog.agdunn.net/?p=277 On the server I log in as "mark", and into /home/mark/.ssh/ I copied my keyfiles id_rsa and id_rsa.pub from my laptop. I used that id_rsa.pub when initialising the gitosis stuff, and can happily connect locally when logged in as 'mark'. From my laptop though, where I have the same keys, I can't connect. I just get an error: git clone git@support:gitosis-admin.git Initialized empty Git repository in u:/gitosis-admin/.git fatal: The remote end hung up unexpectedly The server is Ubuntu 9.04, the client is a Win7 laptop with Cygwin and WinSysGit.

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• GNU screen - Unable to reattach to screen after lost connection

  - by subhashish

  I was using irssi in screen but lost connection. After I ssh'd back in to the server, I can no longer attach to that screen. screen -ls shows that the screen is already attached. I tried screen -D to force detach it, and it said detach but screen -ls still says it's attached. I tried screen -x and it just hangs there. [sub@server ~]$ screen -ls There are screens on: 4033.poe (Detached) 7728.irssi (Attached) 2 Sockets in /var/run/screen/S-sub. What can I do now?

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• failed to enable x11 forwarding

  - by Hunt

  I am trying to enable X11 forwarding on my server which is running on FreeBSD 7.1. I have a putty installed in my windows in which i have enabled X11 forwarding by checking on Enable X11 forwarding and specifying following parameter X display location localhost:0 after that i run putty and checked whether X11 is enabled or not by typing following command echo "$DISPLAY" or echo $DISPLAY but i am getting following error DISPLAY: Undefined variable. Even i have installed XManager but in that also i am getting following error The X11 forwarding request was rejected ! To solve this problem, please turn on the X11 forwarding features of the remote SSH server can anyone suggest me how to get rid off this ?

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• Monitor the shell activity of a user on your Unix system?

  - by Joseph Turian

  Trust, but verify. Let's say I want to hire someone a sysadmin, and give them root access to my Unix system. I want to disable X windows for them, only allow shell usage (through SSH, maybe), so that all operations they perform will be through the shell (not mouse operations). I need a tool that will log to a remote server all commands they issue, as they issue them. So even if they install a back door and cover their tracks, that will be logged remotely. How do I disable everything but shell access? Is there a tool for instantaneously remotely logging commands as they are issued?

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• What is your favorite password storage tool?

  - by Marcel Levy

  Aside from personal passwords, I'm always juggling a number of project-specific passwords, including those for network, web and database authentication. Some authentication can be managed with ssh keys and the like, but everywhere I've worked I also faced the need for the management of passwords that need to be available to a number of different people. So what do you use, either for personal or team-based password management? Personally I'd like to hear about cross-platform tools, but I'm sure other people would be satisfied with Windows-only solutions. I know the stackoverflow podcast tackled this issue in #7 and #9, but I'm hoping we can come up with the definitive answer here. Update: Even though this question was asked before its sibling site existed, you should probably add your two cents to the more active question over at superuser, which is a more appropriate venue for this.

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• How secure is Remote Desktop from Mac OS X to Windows Server 2003?

  - by dwhsix

  It's unclear to me exactly how secure Remote Desktop access from Mac OS X to a Windows Server 2003 machine is. Is the communication encrypted by default? What level of encryption? Are there best practices for making this as secure as possible? I found http://www.mobydisk.com/techres/securing_remote_desktop.html but it's unclear how much of that is still relevant for current versions of RDP and Windows Server. I know I can tunnel RDP over ssh, but is that overkill or redundant?

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• How do I Connect a 30yr-old Tandy 1400LT laptop to the internet?

  - by Clemens Bergmann

  Just for the fun of it, I want to get an old Tandy 1400LT laptop: small monochrome display two floppy drives rs-232c connector "printer" connector connect the thing the internet and use it as an ssh terminal. How would I connect it to the internet? The software should be no problem as it is a 386 hardware. There should be a small linux distribution which can be run on it. But how would I phisically connect the hardware? It has no ethernet port. Has someone experience with Serial/Paralel-to-ethernet converters?

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• %HOMEPATH% Posh-Git error in Powershell, in ConEmu on Windows 7 64-bit

  - by atwright

  I am always getting the following error in Posh-Git in Powershell, in ConEmu on Windows 7 64-bit: Resolve-Path : Cannot find path 'C:\wamp\www\MobileApps\Backbone\%HOMEPATH%' because it does not exist. At D:\Users\Andy\Documents\WindowsPowerShell\Modules\posh-git\GitUtils.ps1:265 char:13 + $home = Resolve-Path (Invoke-NullCoalescing $Env:HOME ~) + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + CategoryInfo : ObjectNotFound: (C:\wamp\www\Mob...bone\%HOMEPATH%:String) [Resolve-Path], ItemNotFoundException + FullyQualifiedErrorId : PathNotFound,Microsoft.PowerShell.Commands.ResolvePathComma nd Join-Path : Cannot bind argument to parameter 'Path' because it is null. At D:\Users\Andy\Documents\WindowsPowerShell\Modules\posh-git\GitUtils.ps1:266 char:29 + Resolve-Path (Join-Path $home ".ssh\$File") -ErrorAction SilentlyContinue 2> ... + ~~~~~ + CategoryInfo : InvalidData: (:) [Join-Path], ParameterBindingValidationExc eption + FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Microsoft.Po werShell.Commands.JoinPathCommand Can anybody advise what might be wrong?

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• Trouble editing ~/.bash_profile: -bash: $'\r': command not found

  - by Dave

  I installed CygWin on Windows 7. Using Notepad, I edited my ~/.bash_profile file to add on to the PATH variable … PATH="${PATH}:/cygdrive/c/apache-ant-1.8.2/bin" Now, when I SSH in to my Windows machine, I get this error … -bash: $'\r': command not found -bash: $'\r': command not found -bash: $'\r': command not found -bash: $'\r': command not found -bash: $'\r': command not found -bash: /home/dev/.bash_profile: line 39: syntax error: unexpected end of file and my PATH is not set. Anyone know how I can correct this?

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• How to confirm php enabled on ubuntu server

  - by Shishant

  Hello, I am not much into linux. I am trying to setup a server through ssh. I installed apache php and mysql through this command. sudo aptitude install apache2 php5-mysql libapache2-mod-php5 mysql-server but I think php is not enabled on the server. when I run command I receive response as below $ which apache2ctl /usr/sbin/apache2ctl but when i check $ which php i receive no response. $ locate php5 /etc/apparmor.d/abstractions/php5 /usr/share/ubuntu-serverguide/html/C/php5.html available apache2 modules aptitude package manager

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• Force10 S60 remote management

  - by StaringSkyward

  We've got a Force10 S60 switch to replace an older Cisco. I can't find a way to give the switch itself an IP address on the local VLAN so I can ssh to it. The config guide talks about using either a management interface on a separate management network or dedicating e.g. a gigabit port as a management port with a dedicated IP address. Ideally I would like to do what we do currently with the Cisco switches, which is in effect give the entire switch an IP so it can be reached from any host on the same VLAN without having to use up a physical port on the switch or physically connect the management port to another device. Is this possible with the S60 and if so, how would you give it, say the address 10.0.1.1 in vlan 10 (10.0.1.1/24)? Thanks!!!

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• FreeNX 0.7.3 under CentOS 6.3 - Negotiating link parameters

  - by Frank

  since some days I try to get freenx (CentOS package 0.7.3) running under CentOS 6.3. It is like found on many websites: First login is successfull, after that all login attempts fail with the negotiation error. A simple ssh with the same username to the server is successful. For the installation I followed the howTo on http://wiki.centos.org/HowTos/FreeNX Strange is that the changelog of FreeNX 0.7.3 tells that this bug was fixed. Has anybody been successful in running FreeNX under CentOS without this problem and knows how to fix it? Frank

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• A good Linux alternative to Ubuntu for a working environment.

  - by Roozak

  Hi, Im running a decent laptop with 3GB ram and 2GHz Core Duo. I use it mainly for working which requires several SSH and SFTP connections to servers and running a VM most of the time. Nothing much more intensive than that. I like using Ubuntu 9.10 however I have the issue of Nautilus and the top/bottom menus freezing up on me constantly - dare I say it, alot more problems than when I was using Windows Vista. Im just looking for recommendations of other operating systems which would be suitable for the task. Thanks

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• What services does hosts.allow NOT affect?

  - by Jed Daniels

  I know that hosts.allow and host.deny only affect things that are tcpwrappered, but what does this mean in practice? It seems that most people use hosts.allow to handle ssh and nfs blocking, but what other services are typically handled there? And what services AREN'T typically handled there? Edit: ok, I realize I did a terrible job of explaining what I was after. No, I'm not interested in knowing if a particular service can be handled by hosts.allow, I want to know if a service will be handled. For example, if I do an lsof -i, I get a nice list of things that are listening for connections to my box. I want to know which ones will be affected if I go stick an entry into hosts.allow (well, I really want to know which ones won't be affected).

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• Input devices stopped working during system upgrade

  - by amorfis

  Hi, I was upgrading Ubuntu on my server (but Ubuntu is in desktop version) when mouse and keyboard stopped working :( So the screen went black (screensaver), and now I can't do anything. I don't know what stage of upgrade it stopped working, probably now it waits for me to answer some question. Keyboard and mouse were connected by KVM, connecting them directly doesn't help. Both are on USB. What I can do, is connecting to the machine by ssh. Can I somehow see and answer questions of update system and somehow finalize process of upgrade?

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• X-ming, Ubuntu apps - getting the Ubuntu style/theme to load

  - by user5402

  I am running X-ming on Windows 7 and using putty to ssh into an Ubuntu system. On the Ubuntu system I use the command: $ gnome-terminal & to display a terminal back on the Windows box. When I do this I don't get the standard Ubuntu style, i.e. dark purple background, Mono font, solid cursor (which I've configured in the Gnome Control Center.) Instead I get a very plain style - white background, blinking cursor, very small font. However, if I run gnome-control-center and then click on, say, the Keyboard icon, the terminal window will be reconfigured with the Ubuntu style with my customizations (e.g. block cursor vs. blinking cursor.) Just starting one of the control applets seems to trigger this style change. My question is: How can I trigger this style change more directly - without having to launch the Gnome Control center and launching one of the configuration applets?

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• iMac goes black, makes clicking sound... thoughts?

  - by Josh

  This is the second time this has happened. The display on my Apple iMac (20-inch Late 2006) just went black, system was completely unresponsive to mouse/keyboard input, I could not SSH into nor ping the machine, and it didn't show up in ARD. I could hear a fairly loud clicking noise from inside which sounded like the DVD drive trying to seek -- but there is no disc in the drive. It could possibly be the hard drive... I pressed the power button and the system powered off, and now will not power on again. Thoughts / suggestions as to next course of action?

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• How to secure Firefox traffic (+DNS) through SOCKS proxy under Ubuntu 10.04?

  - by Maarx

  I'm using Ubuntu 10.04, and starting a SOCKS proxy with 'ssh -D', and setting Ubuntu to use it with "System - Preferences - Network Proxy". Firefox uses the proxy, and the proxy's IP appears when I visit a site like http://www.whatismyip.com/. My question is, is Firefox resolving DNS requests through this proxy? Is my web-browsing truly secure? (That is, until I exit the other end of the proxy. I know it's insecure after that.) (And I've verified the keys, I'm not being man-in-the-middled) (And--screw it. You know what I mean. Is it resolving DNS requests through the proxy?) I don't know how I would go about verifying such a thing for myself. Using additional hardware such as another debugging proxy is not an option. If Firefox isn't resolving my DNS requests through the SOCKS proxy, how do I go about fixing it?

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• kinit gives me a Kerberos ticket, but no AFS token

  - by Tomas Lycken

  I'm trying to setup access to my university's IT environment from my laptop running Ubuntu 12.04, by (mostly) following the IT-department's guides on AFS and Kerberos. I can get AFS working well enough so that I can navigate to my home folder (located in the nada.kth.se cell of AFS), and I can get Kerberos working well enough to forward tickets and authenticate me when I connect with ssh. However, I don't seem to get any AFS tokens locally, on my machine, so I can't just go to /afs/nada.kth.se/.../folder/file.txt on my machine and edit it. I can't even stand in /afs/nada.kth.se/.../folder and run ls without getting Permission denied errors. Why doesn't kinit -f [email protected] give me an AFS token? What do I need to do to get one?

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• bash script - spawn, send, interact - commands not found error

  - by Sandeepan Nath

  I my shell script, I am trying to remove password prompt for scp command (as given in http://stackoverflow.com/questions/459182/using-expect-to-pass-a-password-to-ssh/459225#459225) and this is what I have so far :- #!/usr/bin/expect spawn scp $DESTINATION_PATH/exam.tar $SSH_CREDENTIALS':/'$PROJECT_INSTALLATION_PATH expect "password:" send $sshPassword"\n"; interact On running the script, I am getting errors spawn: command not found send: command not found interact: command not found I was also getting error expect: command not found also, then I realised the path to expect was not correct and expect was not installed at all. So, I did yum install expect, corrected the path and the error was gone. But not able to remove the other 3 errors still.

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• Causes of hard crashes on Windows XP and how to debug

  - by Sam Brightman

  I am occasionally seeing hard lockups on XP: totally unresponsive to keyboard/mouse, screen freezes at time of crash, no SSH/VNC possible. Very intermittent, nothing in the logs. I never see a blue screen on any kind of error message. This morning I logged in via VNC, logged out again, 20 minutes later physically sat at PC and it crashed around the time of VNC logout. I tend to suspect video cards in these kind of situations but it's a modern-ish card with modern drivers (one revision back, but this has been happening for 5 revisions or more) and normally would at least see a blue screen I expect. What would you suspect? Where can I look or what can I set up for more information? Bear in mind that this happens about once every 3 or 4 weeks, so extensive logging or intrusive monitoring isn't really an option.

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• interesting uses for a headless host running Ubuntu.

  - by Manuel

  Hey! So, I have configured a pc with no monitor, keyboard or mouse running Ubuntu. I use it as a ssh server, file backup, web server, etc. Though, it seems as if I could use it for sooo much more. The problem is I can't think of many more uses. What interesting uses of a headless host have you heard of? Is there a cool trick you want to share? Thanks! Manuel

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• How to transfer files between a remote Linux machine and a local Windows machine?

  - by Lazer

  I need to transfer files/folders between a remote machine running Linux and my local machine running Windows XP. I usually access the remote machine through ssh, and sometimes use VNC sessions. What is the easiest way to transfer a file from the remote machine to my local machine and vice versa? I think ftp should be the solution. Is there a better way? If ftp is a good option, how do I initiate the transfer? Do I need to setup ftp servers on both the machines and then transfer? What exactly needs to be done?

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