Ubuntu :: Set NTP To Point To An External Server, But My Thin Clients Don't Get That Setting For Some Reason?
Apr 8, 2011
I'm running several Ubuntu servers with LTSP thin clients in our classrooms. It's been a royal pain trying to get them to synchronize time properly.Currently I'm looking at 7 client's login screen and each one has different time. It's frustrating and I've done all the reading I could in regard to NTP and LTSP with time, etc.I'm trying to even set NTP to point to an external server, but my thin clients don't get that setting for some reason. They still pick whatever time they want to present to the end user. Once the user logs in, the time seems to be fine. It's just at the login screen.Since I'm no expert on NTP I figured I'd ask to see what users here thought.
EDIT - I was told that the GUI version of Ubuntu handles NTP at System-Administration-TimeAndDate. Is this true? I was told my /etc/ntp.conf file is empty because that file is only used in the server edition of Ubuntu.
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Dec 10, 2009
My 32-bit Ubuntu 9.10 [Karmic Koala] LTSP server has two NICs, one with Dynamic IP set by a DSL modem and the other with static IP of 192.168.0.254. I also have 4 thin Clients that boot from this server without any problems and another computer with Ubuntu 9.04 running some PHP programs with dynamic IP given by the same DSL modem. When I send requests to these PHP programs from thin clients, they all give the LTSP server's dynamic IP as their IP so I cannot trace who has sent this request to response back.
I actually know this is logical. Because the requests are sent by a program that's actually running on the LTSP server rather than the thin client. But my question is How can I run a program on a thin client with it's own IP? I also should mention that the dhcp3-server service running on the LTSP server has no conflicts with the DSL dhcp on the network and I know that the 4 thin clients get the IPs ranging from 192.168.1.101 through 192.168.1.104 from the dhcp3-server service. Because I can ping them while they're on. but /sbin/ifconfig on them shows info about the LTSP server.
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Apr 1, 2010
That is, the thin clients will have to get their OS image via TFTP, and their IP address via DHCP on a *wireless card* - is this possible?What spec should I ask for/search for when buying the WiFi card?
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Dec 19, 2010
I'm running LTSP on 11.04. The clients boot fine and will recognise the local CD and local USB drives but it doesn't mount the HD?
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Jan 19, 2009
My brother and I want to set up a server off of which we would provide the processing power for several thin clients. Is it possible to serve the thin clients with images of Windows XP to run?
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Nov 22, 2010
we have a DNS server is being used for external clients .Recently we installed awstat monioring tool in ordr to collect either ftp or mail statistic. Since our server is DNS server by defenition we may see all external clients requests to the ftp/mail services .But a LAN clients cannot be resolved by their IPs . The second nameserver line doesn't work. DNS server's conf file looks like :
search mycompany.com
nameserver 127.0.0.1
nameserver LAN_IP_Address
How to configure the server it will resolve both external and corporate clients ?
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Jan 31, 2010
I'm trying to setup a server at home, it has some practical implications, but largely it is just to take a stab at it. But I need the help of someone with more experience than I in defining exactly what I'm looking to do.
Here's what I have: old PC running Gutsy server connected to router. Several laptops at home connected via wifi to router. All laptops running either Windows or Ubuntu. Here's what I'm looking for: The server centralizes file storage for all clients. I would likely incorporate a RAID and some synchronised imaging of the files. I also want the server to create disk images of the clients hdd, regardless of client OS.There would also be some shares that would be publicly accessible (myself and friends accross the country would be able to access the same drive).
So I was thinking something like what corporate environment would be nice, you log into a profile that exists on the server. Like a dumb client...all data would be stored on the server. But I'm thinking that's more like a network boot and wouldn't work via wifi (or would it?). Also that wouldn't lend itself well to laptops used on the road in areas without net access. now I'm thinking each client would have its own locally installed OS, and they would just access networked shares. I could store sensitive files on the shares, but that wouldn't provide complete backup solution for each client.
Without rambling on anymore, anyone care to throw out some ideas? I'm really just looking to see if I can do what I want. The focus is on centrallizing files, securley backing up data and client OS's and ability to restore said images quickly.
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Apr 3, 2010
I've searched through google, and all I can find are instructions on how to set up a L2TP/IPSec VPN that works with macs and iPhones. I'm NOT trying to set up an L2TP/IPSec VPN. I'm trying to set up a pure-ipsec vpn.
The iPhone IPSec client is a built-in cisco client, I believe. I'm staying away from L2TP and PPTP because I need multicast packets to go through. *edit: wow, i just noticed that the title says "8.10 LTS". Oops! I obviously mean "8.04 LTS". Gah, the lack of sleep got to me.
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Jan 15, 2010
Ive spent the last couple of days looking for a way to set this up and cant find the solution anywhere. Right from what iv read so far i understand i have to set the card to master mode but when i try
Code:
sudo iwconfig wlan0 mode master
i get the error
Code:
Error for wireless request "Set Mode" (8B06) : SET failed on device wlan0 ; Invalid argument.I read somewhere that the madwifi driver is up to the task but im still quite new to linux and not really sure how to change the drivers. this is what iv done so far
Code:
wget http://snapshots.madwifi-project.org/madwifi-trunk-current.tar.gz
tar xvxf madwifi-trunk-current.tar.gz
cd madwifi-trunk-r4108-20100115/
sudo make
[code].....
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Jan 30, 2010
I'm trying to give some windows users a permanent connection to a samba share behind a firewall over the public Internet. I know I can give them access with something like winscp (which they have done) but really I'd like to do it with a VPN so it seems seamless to the user. However I have no idea how to set up the server to support this and am finding the documentation a bit confusing. The samba share is on a Debian box and the firwewall is a Linksys WRT54GL.
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Jul 6, 2010
I have setup a DNS server in a LAN,How should I configure the clients on the LAN to point to my dns??
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Mar 28, 2011
I recently installed the pptpd server on my system and set it up according to these instructions:HTML Code[URL]t=132029However after setting everything up on attempting to connect to it from a windows machine (windows 7 home premium to be specific) it gives me two errors which are 720 and 800...It reaches "registering your computer on the network" fine and then gives 720 on the first attempt to connect and then 800 on the second attempt to connect...and then on the third 720 and 4th 800 and so on..My system running the server's I.P is 192.168.1.70My system running the windows OS trying to connects I.P is: 192.168.1.66
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Feb 3, 2010
Been trying to find out the mount point for an external usb hub. I can find information with lsusb :
Bus 001 Device 002: ID 05e3:0608
and dmesg:
[0.924293] hub 1-0:1.0: 4 ports detected
But can't seem to find where the hub is mounted. I've tried / dev and /etc/fstab and mtab and /media. BTW what does [0.924293] signify?
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Jan 13, 2010
I have a Sonicwall access point, which I am able to set up through the interface, but after that I am unable to achieve a connection through my wireless card. I have a good understanding of everything involved, but really have no hands on experience when it comes to networking.
Code:
lspci
00:00.0 Host bridge: Silicon Integrated Systems [SiS] 735 Host (rev 01)
00:01.0 PCI bridge: Silicon Integrated Systems [SiS] Virtual PCI-to-PCI bridge (AGP)
[code]....
Also, I should have mentioned that @ the interface for the Sonicwall it said that "no DNS server had been specified", but I set it up for DHCP, and I thought my ISP is using PPPoE (which I also thought used DHCP).
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Nov 7, 2010
I'm trying to set up a wireless access point and router using Ubuntu 10.10. My machine has an Atheros AR5001X+ PCI card, and eth0 is connected to an ADSL modem.After literally days and days of going in circles, I'm hoping that somebody here can help get me on track.This sort of works, though I had to go through some other contortions to get the madwifi driver to finally compile on my machine.At this point, I can see and connect to the WAP, but nothing more. When I try "sudo /etc/init.d/networking restart",
I also have a second problem, which is that I want to use WebMin to manage this server, but I cannot figure out how to get the ADSL client module configured -- RP-PPPoE version 3. It seems to expect to work with pppoe-start, pppoe-stop, and pppoe-status, but when I try to run pppoe-status it says "Link is down", even though my ppp connection is actually working.Is is possible to use the WebMin ADSL client module with Ubuntu? I spent a lot of time trying to get pppoe-start, stop, etc. working but it was a complete mess and never seemed to behave. Finally, I just put the ppp startup commands into the /etc/network/interfaces file and that worked, but now the pppoe-* commands no longer seem to function.
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Apr 21, 2011
For some reason Eclipse 3.4.2 I installed is always picking up the 1.6 JDK and bombing out even though I have 1.4.2 installed. How do I make Eclipse point to the 1.4.2 version I have? I see there is an eclipse.conf file and perhaps that's where I make the setting? And which setting should I put there?
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Mar 12, 2010
I would like have my client computer be able to boot off of a cd right into a terminal server connection. Not click here, then there, enable wireless....so on.. Just boot into a terminal server connection screen.
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Sep 20, 2010
i want to share the Internet connection to thin client from my Ubuntu server,Internet is accessible to my Ubuntu server but i am unable to boot from thin client to server,i configured DHCP but of no use.can any plz send me the detailed steps to configure thin clients in my network
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Jan 11, 2010
I have just updated to karmic, and I found that my external hard disk partitions, previously mounted under /media/disk and /media/fat are now referenced by something looking like a UUID, namely /media/7b096ea4-60ee-46b1-95cd-1851b051c40d and /media/4951-95D9.
Is there a way to revert to the old settings? Any application relying on the files on the external hard disk has now stopped working. While I certainly could just change reference (assuming the UUID does not change every session), I'd rather use the old names if possible.
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Aug 16, 2010
I have successfully set up a cable internet connection in Ubuntu (created a new DSL connection by typing login and password and connected the cable - it worked). But I have no idea how I can set up a wireless internet connection.I have a wireless access point TL-WA501G, laptop and a cable internet connection with fixed IP address.My laptop can see the wireless access point. But I really do not know how to make it all work and what to start from.
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Dec 2, 2009
I have Samba PDC server on CentOS 5..we have 10 thin clients in our network which were working fine previously with the windows Terminal services... Now i have replaced my windows 2003 Domain to Samba Domain Controller.. Is there any why i can connect our thin clients with SAMBA DC in the our environment?
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Aug 19, 2011
I have just been gifted with a Linux dedicated server for the next six months, with an option to renew after that time has expired, and I'd like to set it up for FTP/P2P use. I do have some familiarity with Fedora from work, but only as a pre-installed desktop OS. The company providing the server has asked me to choose a OS, so of course I picked the one with which I already have some knowledge. They've also asked me to provide partition and mount point information, and it's here that I'm having some problems. I've spent most of my free time today reading everything I could about partitioning for a server, and I'm still not comfortable making this decision on my own.
The server comes with two drives - one 500GB and one 1TB, and 8GB RAM. My thinking is to use the 500GB drive for the OS, and the 1TB for media storage. I know I still have a good bit of learning to do, but I just want to get the blasted thing set up so I can get on with the hands-on part of figuring out how it works.
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Jul 22, 2011
I am trying to install and configure LTSP on a server for a HP thin client to boot off. The version of Ubuntu that I am using is 11.04 x86 and it is a fresh install on a dual core system with 2GB RAM. I followed a guide which comprised of these commands.
sudo apt-get install ltsp-server-standalone openssh-server sudo ltsp-build-client or if your on a 64-bit system with 32-bit machines do sudo ltsp-build-client arch i386 for editing the servers IP values use /etc/ltsp/dhcpd.conf after that you need to restart DHCP server sudo /etc/init.d/dhcp3-server restart
and update sshkeys -sudo ltsp-update-sshkeys and if you updated dhcpd.conf then you need to update you image also by typing in terminal ltsp-update-image
Everything seemed to install as it should but when I try to boot from the thin client it just times out and says no DHCP or proxy invites received. I turned DHCP off on the router and even tried another router, but I still get nothing. I am at a bit of a loose end and I hope someone on here can point me in the right direction of where I am going wrong.
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Sep 22, 2010
plz can any one help me in configuring linux server 5.0 to share the internet connection to thinclient and the steps reqiure at client side and server
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May 16, 2009
I have a wordpress blogging server up and running and i've also got nagios monitoring the speed of webpage download etc.The thing is a couple of weeks ago nagios alerted me that the blog was returning pages really slow loading, when i went to the blog homepage for me also it was very slow. After about 30mins of http connections some finally loading and some not nagios stopped reporting issues, but thats not the end of the story, the graphing of speed i've got set-up on nagios shows quite clearly that ever since that big slow down the pages take avg of extra 2-3 seconds to load. However nothing drastic has changed and the datasize of the page hasn't really changed at all (also monitored).
During that weird period I carried out checks on the server itself like top, free -m, netstat (looking for maybe DOS attack number of connections), looked at mysql see if that was running slow and what processes it was running, checked on number of http processes see if they had ramped up, checked on php and web server errors see if they had increased some what as well. None of these things turned up anything noticeable to be causing such slow blog response.Now its still that average amount high and i'm lost at why this could be? Its niggling at me that something may have got in but i've taken several security steps to try and lock down the wordpress install etc.
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Sep 8, 2010
My server OS CentOS release 5.4 (Final). Using Plesk panel 9.2..Server getting down frequently, how to check the log on server. how to find out the reason.
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Mar 31, 2010
I experience X crashes on a frequent level. First it happened with the current stable nvidia 180 driver, and the nonfree flash player (....., vimeo, etc). I replaced the stable nvidia driver with the 180-dev driver which fixed the flash problem. However it still happens that the X chashes without any reason or pattern. One time it crashed the moment I wanted to save a PDF file to my HDD downloading it with Firefox, another time it crashed while idling. I use an Alienware M15x with a nvidia 260M. Compiz is installed and active. Which other data or logs do you need?
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Feb 9, 2011
I'm rather (VERY) inexperienced when it comes to Linux, but Fedora 14 is the environment I have to use on my laptop at work, so please forgive any dumb that comes out of me.
How do I tell php to send an email with mail() using an external mail server?
The situation: I've got apache/php running a webserver on my local machine. It's for dev purposes only, and the website files I'm using are checked out from our SVN. This lets me make changes to our website while not actually changing our website.
I've come across an issue I'm fixing where I need to verify that an email is successfully getting sent out, and unfortunately, this email is sent out using php's mail(), and not our website's usual $mail object. Unfortunately, I don't have the authority to change how this sends out right now, just when it sends out.
I've been running everything fine on my machine for a month now, and haven't needed the mail stuff until now. How do I tell php to send an email using an external server?
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Jan 16, 2011
I was trying to change the mounting point of a usb external drive from '/media/disk' to '/media/Movies'
Here is were the stupid part takes over... I right clicked on the desktop icon for the device and selected Properties. From there I selected the Volume tab and in there I changed the mounting point to '/media/Movies' It accepted it and said the changed would take place when I unmounted it and remounted it. However, when I did this it now says it cannot be mounted as it says mount_point contains invalid characters usually /
Unfortunately, now I cannot get back into the properties to remove my error.
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Apr 3, 2010
There is a server which was installed 3 days back. It got Cent OS 5.4 64 Bit with 4 GB RAM. Apache, MySQL, PHP and vsFTPd were installed using yum.Server was on the network and approx 100 visitors were on the website. All of sudden server got down. It stopping responding ping. Server guys told that server got down and after a request submission, they restarted server. However reason of the problem is still unknown. I logged in to shell via SSH and checked /var/log/messages file, but didn't find any record which indicate cause of system shutdown. However dates in this file aren't in chronological order.
Is there any way or log file to check for the exact reason, why system got down. One reason could be hardware fault (for that I am going to ask hosting company to run diagnostics). Other reason could be a software/os bug. Is there any tool / log file to check and diagnose the cause.
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