IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 9 October 2011 (all times are UTC)
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| 03:49 | <Alex____> Hi all, earlier today I came on to ask some Q's about ltsp and launching Rdesktop into a VM, someone pointed in me in the direction of attempting to launch Rdesktop in xterm on the thin client, this didn't do anything. So I guess this is progress, but I don't know exactly what it means???
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| 03:57 | Does anybody have any clues on how to proceed? I'm attempting to get Rdesktop to launch into a Windows 7 virtual machine. I want this to work via lts.conf. When adding in screen_07 = Rdesktop and underneath that, RDP_SERVER = "192.168.1.71" I am greeted with a black screen but moveable white cursor at boot. If I try to boot into Rdesktop using the standard GNOME desktop environment, this works flawlessly. Xterm, nothing happens, it just
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| 03:57 | something but nothing happens.
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| 04:49 | <Alex____> No one out there able to help?
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| 04:51 | alkisg were you the one who was able to help me earlier? Sorry if not.
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| 04:51 | <alkisg> Yup
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| 04:51 | <Alex____> Ah !
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| 04:51 | Xterm didn't launch a thing :)
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| 04:52 | <alkisg> Did the local xterm open?
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| 04:52 | <Alex____> Yup
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| 04:52 | <alkisg> What was the output, when you ran the rdesktop command?
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| 04:52 | <Alex____> Nothing, it hung,
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| 04:53 | <alkisg> What command did you try?
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| 04:53 | <Alex____> (Inside local xterm) rdesktop -u user -p password -f 192.168.1.71
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| 04:53 | <alkisg> OK, open a local xterm again and try: ping 192.168.1.71
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| 04:53 | <Alex____> More args later once it works obviously.
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| 04:54 | Ok - one second.
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| 04:54 | <alkisg> Wait. When you say "it hanged"?
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| 04:54 | <Alex____> Sure?
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| 04:54 | It took the command, no output
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| 04:54 | <alkisg> You mean it actually hanged? You couldn't move your mouse anymore?
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| 04:54 | <Alex____> No I mean, it took the command, but absolutely nothing happened,
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| 04:54 | <Alex____> However the terminal was then busy, not able to input anything else
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| 04:54 | <alkisg> OK, try the ping above ^
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| 04:55 | <Alex____> Nothing
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| 04:55 | Sends one ping, no response, no timeout,
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| 04:56 | Cant enter any other commands.
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| 04:56 | <alkisg> Wait for a timeout
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| 04:56 | <Alex____> Will do,
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| 04:57 | <alkisg> Ah or maybe ping doesn't timeout, not sure
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| 04:57 | OK, anyway
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| 04:57 | Now try: ping server
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| 04:57 | (press ctrl+c)
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| 04:57 | (to stop the previous ping)
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| 04:57 | <Alex____> Ah, that yielded results.
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| 04:57 | 100% timeout :)
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| 04:57 | <alkisg> What's the server ip?
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| 04:57 | <Alex____> 192.168.0.1
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| 04:57 | Hang on
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| 04:57 | Let me double check.
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| 04:57 | <alkisg> So when you said "ping server",
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| 04:58 | it replied that it got a response from 192.168.0.1 ?
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| 04:58 | <Alex____> 192.168.254.1
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| 04:58 | <alkisg> Let me put it another way
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| 04:58 | <Alex____> Before when I pinged 192.168.1.71 - 100% loss (This is the IP of the VM)
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| 04:58 | <alkisg> grep server /etc/hosts
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| 04:58 | What's the output of that?
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| 04:59 | <Alex____> Gives my LTSP server ip of 192.168.254.1 (This is also the machine where the VM's are running.
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| 04:59 | <alkisg> Yesterday you said that your ltsp server ip is 192.168.1.70
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| 04:59 | <Alex____> No, that is the IP of Windows 7 VM
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| 05:00 | <alkisg> Let me check that I got this correctly:
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| 05:00 | <alkisg> Physical server: 192.168.254.1
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| 05:00 | <Alex____> Yes
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| 05:00 | <alkisg> LTSP server: 192.168.1.71
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| 05:00 | <Alex____> No
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| 05:00 | <alkisg> windows 7: 192.168.1.70
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| 05:00 | No?
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| 05:01 | <Alex____> Physical server = LTSP server = 192.168.254.1
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| 05:01 | Windows 7 VM = 192.168.1.71
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| 05:02 | <alkisg> http://irclogs.ltsp.org/?d=2011-10-08
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| 05:02 | 18:11<alkisg>What's the ip of the vm server? 18:11<Alex_____>192.168.1.71 18:11<alkisg>What's the ip of the ltsp server? 18:11<Alex_____>70
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| 05:02 | So you did say yesterday that your ltsp server ip is .70
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| 05:03 | <Alex____> Oh shit, sorry.
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| 05:03 | Sorry about that.
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| 05:03 | <alkisg> So anyway your problem is that your ltsp client doesn't have a route to your windows vm
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| 05:03 | <Alex____> Didn't meant to cause confusion.
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| 05:04 | Ok, so how do I fix that?
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| 05:04 | <alkisg> You need to do NATting on your ltsp server
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| 05:04 | https://help.ubuntu.com/community/UbuntuLTSP/ThinClientHowtoNAT
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| 05:04 | Or something like that
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| 05:04 | Alex____: how many NICs does your ltsp server vm have?
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| 05:05 | <Alex____> 2
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| 05:05 | One using DHCP to get an IP from the router,
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| 05:05 | <alkisg> bridged, right?
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| 05:05 | <Alex____> Ye
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| 05:05 | s
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| 05:05 | Eth0 bridged with bra for the VM
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| 05:05 | br0
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| 05:05 | *
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| 05:06 | eth1 = static ip running dhcp3 server for the LTSP clients.
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| 05:06 | <alkisg> And eth1 again bridged, so that the physical ltsp client will boot?
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| 05:06 | <Alex____> eth1 is not bridged.
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| 05:06 | I have a proper thin client here,
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| 05:06 | Booting via PXE
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| 05:07 | <alkisg> When you say proper... is that client real hardware, or a VM?
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| 05:07 | <Alex____> Real hardware.
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| 05:07 | Ok
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| 05:07 | Let me clear this up exactly.
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| 05:07 | It's as follows.
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| 05:07 | <alkisg> what networking mode do you use for eth1?
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| 05:07 | ...if not bridged?
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| 05:07 | <Alex____> What mode?
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| 05:08 | <alkisg> How many physical NICs does your physical server have?
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| 05:08 | <Alex____> 2
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| 05:08 | <alkisg> So, you bridge the ltsp eth0 with the server eth0, right?
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| 05:09 | <Alex____> No, eth0 is bridged with (virtual adapter br0) for the VM's. Eth1 is acting as a DHCP for the thin clients on the network.
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| 05:10 | eth0 receives internet, this gives the VM access to the outside world (And makes it accessible via RDP)
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| 05:10 | Eth1 is not bridged. It's configured to run dhcp3 server for the network, so that thin clients can boot via PXE. The only virtual components in this system are, (windows vm's and br0 as the bridged virtual adapter for the VM's to use)
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| 05:11 | <alkisg> Your ltsp server is a VM, right?
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| 05:11 | <Alex____> No, it's a physical server
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| 05:11 | It's built into ubuntu
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| 05:11 | It's the same machine that runs the VM's,
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| 05:12 | <alkisg> OK, sorry I thought your ltsp server was a vm too
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| 05:12 | So yes, that nat wiki page is what you're looking for
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| 05:12 | <Alex____> Nope, it's real enough for me to throw out the window :)
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| 05:13 | <alkisg> :)
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| 05:13 | <Alex____> Great!
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| 05:14 | How likely to stuff everything up is the NAT process ?
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| 05:15 | So with NAT configured, Rdesktop should be able to find its own route to the VM ?
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| 05:15 | <alkisg> Yes
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| 05:15 | <Alex____> Or do I need to configure this specifically for the VM setup I have?
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| 05:15 | Awesome.
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| 05:16 | Right, that answers the biggest question. I'll get onto that soon. Thank you so much for that.
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| 05:16 | I had another small (minor detail)
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| 05:16 | Will this then work at boot through lts.conf (IE screen_07 = desktop) etc etc?
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| 05:17 | <alkisg> Alex____: if you move your vm to the other subnet, you won't need nat
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| 05:17 | I.e. put it in the ltsp client subnet
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| 05:17 | <Alex____> Really? Do I need to configure br0's ip/subnet to match? Or change the IP's within the VM itself?
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| 05:19 | So for example, even though eth1's ip is 192.168.1.70 can I bridge br0 with different ip and subnet ranges?
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| 05:21 | eth0 = 192.168.1.70 bridged with eth0 ip of 192.168.69 (for the VM etc)
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| 05:22 | eth1 = 192.168.1.254.1 (LTSP dhcp3 server)
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| 05:22 | Can I just changed eth0 to match the subnet of eth1?
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| 05:23 | <alkisg> I meant that you made a new bridge for eth1, and put the windows vm in the 192.168.254.x subnet too
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| 05:23 | <Alex____> SHIT
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| 05:23 | Typo
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| 05:23 | So,
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| 05:23 | <alkisg> If that sounds like trouble, follow the nat page instead
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| 05:23 | <Alex____> No no, that makes sense,
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| 05:23 | Can I bridge with eth0 and eth1 at the same time??
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| 05:24 | Because if I remove the bridge from eth0, then the VM no longer has internet access. Or will it get internet access through eth1?
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| 05:25 | <alkisg> You're right, you'd need NAT again for the windows vm, OR
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| 05:26 | to have 2 nics on the windows vm too
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| 05:26 | <Alex____> And bridge one NIC with eth0 and one with eth1?
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| 05:26 | <alkisg> One as it is now, and a new one on the new bridge we're talking about
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| 05:26 | Yes
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| 05:26 | <Alex____> That sounds easy enough :)
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| 05:26 | <alkisg> Then you'd rdesktop to the new vm ip
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| 05:27 | <Alex____> Which would be in the region of 192.168.254.xx
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| 05:27 | <alkisg> (well the easier setup would have been to only use 1 single subnet everywhere :D)
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| 05:27 | Yes, 192.168.254.xxx
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| 05:27 | <Alex____> Yes :D but my router didn't like me handing out a DHCP server while it was dishing out one too.
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| 05:27 | <alkisg> You don't need 2 dhcp servers to run ltsp
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| 05:27 | 1 is enough, the one from your router
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| 05:28 | <Alex____> Oh really?
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| 05:28 | I didn't know this. :P
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| 05:28 | <alkisg> But anyway you're close now, leave that for another time
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| 05:28 | <Alex____> I shall,
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| 05:28 | This has been the best help ever. Thank you so much. I'll be sure to keep coming back and help out myself where I can.
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| 05:28 | <alkisg> You're welcome, lets see :)
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| 05:29 | <Alex____> I have to give it a crack later, work beckons once again :S
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| 05:30 | Alright - I'm off. Hope to chat again sometime.
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| 08:42 | <Alex____> Hi alkisg :) I'm back :D
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| 08:43 | NAT is set up (from what I can tell) correctly, but it still doesn't let me connect to the VM,
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| 08:44 | I also attempted to setup a secondary bridge (br1) bridging with eth1 (which is the LTSP configured NIC) and adding a second NIC in the VM, this then prevented the thin client from booting for some odd reason.
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| 08:44 | I don't know why but the thin client couldn't seem to decide what to choose from.
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| 08:46 | <alkisg> Alex____: can you ping the windows VM from the ltsp client?
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| 08:46 | <Alex____> Nope,
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| 08:46 | Still definitely no route
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| 08:46 | <alkisg> Try running those commands on your ltsp server:
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| 08:46 | sudo -i
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| 08:46 | iptables -t nat -A POSTROUTING -j MASQUERADE
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| 08:46 | echo 1 > /proc/sys/net/ipv4/ip_forward
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| 08:47 | Then on the local xterm on the client again, try pinging the windows vm
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| 08:47 | <Alex____> Ok give me one second, I'll post results when done.
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| 08:52 | Ok done, still no ping.
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| 08:53 | 18 transmitted, 0 received, 100% loss.
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| 08:54 | <alkisg> Alex____: and now try pinging the windows vm from a gnome terminal inside the thin client session
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| 08:55 | Ah, Alex____, did you put option routers to your dhcpd.conf?
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| 08:55 | Paste your dhcpd.conf from your ltsp server
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| 08:55 | <Alex____> Uh, destination un reachable?
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| 08:55 | <alkisg> !pastebin
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| 08:55 | <ltsp> alkisg: pastebin: the LTSP pastebin is at http://ltsp.pastebin.com. Please paste all text longer than a line or two to the pastebin, as it helps to reduce traffic in the channel. Don't forget to paste the URL of the text here.
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| 08:55 | <alkisg> Ah, you can't ping it from inside the session either?
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| 08:55 | <Alex____> Yeah,
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| 08:56 | <alkisg> I thought you said it was working previously
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| 08:56 | <Alex____> It's returning from 192.168.1.69 though, not 71
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| 08:56 | It was,
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| 08:56 | <alkisg> Wrong route then
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| 08:56 | <Alex____> I seem to have broken something here,
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| 08:56 | How do I get it to route to the correct ip?
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| 08:57 | I can still connect to the Rdesktop session in the gnome terminal
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| 08:57 | On the ltsp thin client.
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| 08:57 | <alkisg> Erm what? That's what I told you to try.. then what part returns destination unreachable?
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| 08:58 | So anyway, all this is a networking problem, not really related to ltsp. You can ask here to see if anyone's available, or you can try in #networking, or #yourdistro, or even google it a bit. /me is off for a bit, bbl
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| 08:58 | <Alex____> No I mean, I can't PING it, I can still Rdesktop into it.
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| 08:58 | <alkisg> Ah, you've some kind of firewall then
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| 08:58 | So try rdesktop from the local xterm
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| 08:59 | <Alex____> I have,
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| 08:59 | Still no go with Rdesktop in local xterm.
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| 08:59 | It's alright, you've helped me plenty. :)
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| 08:59 | <alkisg> Pastebin your /etc/ltsp/dhcpd.conf
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| 08:59 | <Alex____> I did,
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| 08:59 | <alkisg> url?
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| 09:00 | <Alex____> http://pastebin.com/JmjSyAvx
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| 09:01 | <alkisg> from the local xterm on the client, do: route -n
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| 09:01 | And the same from gnome-terminal
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| 09:02 | <Alex____> xterm - no command found.
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| 09:02 | Gnome, what would you like to see?
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| 09:02 | Output?
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| 09:03 | <alkisg> Yes, output of route -n
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| 09:03 | <Alex____> Easiest if I paste bin it.
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| 09:04 | pastebin.com/0xwRDTLu
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| 09:04 | http://pastebin.com/0xwRDTLu
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| 09:06 | <alkisg> And from the local xterm, try: /sbin/route -n
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| 09:08 | <Alex____> How to copy in xterm :S
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| 09:09 | <alkisg> Select, and middle mouse click on the destination
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| 09:10 | <Alex____> Crikey and on a laptop?!
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| 09:10 | <alkisg> left+right click together
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| 09:12 | <Alex____> http://pastebin.com/daG3zp1u
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| 09:13 | <alkisg> And your ltsp server is at 192.168.254.1 ?
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| 09:14 | <Alex____> Yeah
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| 09:14 | <alkisg> Your routes seem ok with a quick look then, so it must be a nat problem
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| 09:14 | OK, I'm off, try #networking if you don't get help here
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| 09:15 | <Alex____> Thanks for everything :)
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| 09:15 | Have a good one,
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| 09:15 | <Alex____> Cheers
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| 15:24 | <Matrix3000> Anyone using SSH_FOLLOW_SIMLINKS?
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| 15:25 | <FrozenZia> Hi! Question. I
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| 15:26 | I'm trying to figure out what's going on when I boot up a machine on my Debian-Edu setup...
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| 15:26 | There seems to be /etc/dhcp3/dhcpd.conf, but then there's also /etc/ltsp/dhcpd.conf...
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| 15:28 | It looks like the 1st one is getting used for starters, but is there a way to tell which .conf or .cfg files are actually getting USED when a client gets booted?
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| 15:29 | <alkisg> Matrix3000: I think I answered you nfs question twice the last days, but both times it was some hours after you asked (you were still online)
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| 15:29 | Matrix3000: you can set NFS_HOME=otherserverip:/home
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| 15:31 | <Matrix3000> ah ok
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| 15:31 | and that would fix my issue with google chrome?
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| 15:31 | <FrozenZia> What I'm actually trying to do is work out how to get to a PXE menu (so I could boot other options), and according to documentation, it looks like that's how DebianEdu is set up "out of the box", but my clients seem to boot straight w/o any sort of menu.
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| 15:32 | <alkisg> Matrix3000: Yes, as long as your nfs is configured correctly and works
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| 15:32 | <Matrix3000> FrozenZia, it is possible, what options do you neeed?
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| 15:32 | <FrozenZia> The /etc/ltsp/dhcpd.conf has an entry pointing to a specific pxelinux.0 (and the .cfg/default doesn't have a menu)
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| 15:33 | <Matrix3000> It doesn't by default
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| 15:33 | you have to set it up to use it
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| 15:34 | http://irclogs.ltsp.org/?d=2011-09-05
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| 15:34 | It's been talked about setting it up for Memtest
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| 15:35 | <FrozenZia> Matrix3000: that's fine, I'm just trying to determine what places I *really* need to edit to get it working, and was trying to determine how the whole boot-up/dhcp sequence works...
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| 15:35 | * FrozenZia is checking the link... | |
| 15:35 | <Matrix3000> alkisg, so there is no need for the Symlink stuff?
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| 15:36 | <alkisg> Matrix3000: didn't you say that it doesn't work for you, with SSH_FOLLOW_SYMLINKS=True or False?
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| 15:36 | <alkisg> There are a few apps that just won't work with sshfs. I know evolution is one of them, I don't know about chrome or whatever else you're using
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| 15:36 | <Matrix3000> No, i was reading it, and it said that there we too options
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| 15:37 | <alkisg> But if you'll be using NFS, then there's no need for SSH_FOLLOW_SYMLINKS, no
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| 15:37 | <Matrix3000> Chrome puts a lock on a file and people have issues with it
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| 15:37 | i have /home mounted specifically on the server itself
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| 15:37 | <alkisg> Try first with SSH_FOLLOW_SYMLINKS=True, then try with SSH_FOLLOW_SYMLINKS=False, and if noone of them works, use NFS.
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| 15:37 | <Matrix3000> just on the server
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| 15:37 | ah ok
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| 15:37 | will try that then
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| 15:54 | <FrozenZia> Matrix3000: alright, looked at your conversation with Vagrant, but it doesn't seem to apply to my case.
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| 15:57 | <Matrix3000> ok, what are you trying to do exactly then?
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| 15:59 | <FrozenZia> Well, I guess i wanted to start by editing the *appropriate* dhcpd.conf so that instead of getting pxelinux from spot X, it'd get it from spot Y.
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| 16:01 | I tried to be sure I was using the right dhcpd.conf by specifying a fixed IP for a certain MAC address, but that didn't seem to "take", so I think I'm editing the wrong file.
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| 16:01 | <Matrix3000> ah, yea that's outside of my realm im not using dhcpd on ubuntu
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| 16:01 | im using a completely different system
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| 16:01 | so yea, i won't be able to help
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| 16:01 | <FrozenZia> rats.
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| 16:02 | you and Vagrant were talking about /ltsp/update-kernels, and it seems I don't have any such beast in debianEdu
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| 16:03 | But I think the instructions that I have found will work, as soon as I could figure out the bootup/dhcp process, and how it really goes.
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| 16:05 | it's weird - the /etc/dhcp3/dhcpd.conf lists a leases file, and sets ddns-update-style to none, but the rest of the settings are all about ldap, nothing about ltsp.
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| 16:06 | ...and nothing that screams at me "this is a link to the ltsp/dhcpd.conf file which also gets used..."
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| 16:21 | <Matrix3000> how does this look for a lts.conf file?
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| 16:21 | http://pastebin.ubuntu.com/704958/
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| 16:22 | will that also shutdown the fat clients?
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| 16:50 | <FrozenZia> hmmm -- if I understood what I just came across correctly, Debian Edu 5.0 has the DHCP and DNS config actually stored in LDAP, which would explain why the /etc/dhcp3/dhcpd.conf basically consisted of ldap entries. Sheesh what a pain in the butt. Well, this is gonna have to wait til tomorrow for more investigations.
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| 18:39 | <Matrix3000> Debian Edu seems pretty cool
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| 18:39 | I use LDAP heavily in our business environment
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| 18:39 | I wish I could manage DNS and DHCP with LDAP
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| 18:53 | <Matrix3000> How do I specify multiple "SEARCH_DOMAINS"?
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| 20:03 | <Matrix3000> When using chrome on LTSP i get this. The profile appears to be in use by process 1875 on host ltsp105. If you are sure no other processes are using this profile, delete the file /home/eanderson/.config/google-chrome/SingletonLock and relaunch Google Chrome.
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| 20:04 | <alkisg> And if you close google chrome and delete that file and re-launch chrome, does the message persist?
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| 20:04 | <Matrix3000> nope
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| 20:04 | <alkisg> So it then works?
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| 20:04 | <Matrix3000> but then it comes back if i go to a different pc
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| 20:04 | after closing chrome
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| 20:05 | <alkisg> So just make a /usr/local/bin/chromium-browser launcher that deletes that file before actually running chrome :)
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| 20:05 | <Matrix3000> haha, that's sneaky
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| 20:05 | kinda like how i fixed that gnome-panel issue
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| 20:05 | <alkisg> #!/bin/sh
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| 20:05 | rm -f ~/.config/google-chrome/SingletonLock
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| 20:05 | exec /usr/bin/chromium-browser "$@"
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| 20:06 | That's all...
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| 20:06 | <alkisg> Or, switch to NFS, you're already using it anyway
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| 20:06 | Unless you're too concerned about security and you didn't use kerberos etc
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| 20:07 | <Matrix3000> I used LDAP
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| 20:07 | but the nfs share i believe has LDAP installed on it
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