Linux Terminal Server Project
System requirements for an LTSP network vary depending on the number of concurrent diskless workstations accessing the server and the applications they will be running. The two most important things to consider here are the server's available memory and the speed of the network. Even though a 10Mb network can handle a large number of diskless workstations running console-based applications, a faster (100Mb) network is required if the workstations are to run remote X sessions and productivity applications like StarOffice. The minimum server configuration for an LTSP network is a Pentium-class computer with at least 64MB RAM and a 2GB hard drive. On the workstation side, a 486 or K5 computer with 16MB RAM and a 1MB video card (for X) can get the work done.
The whole LTSP network operation depends on the good condition of network cards, hubs and cabling to run properly and smoothly. Please be sure to check them prior to any installation.
LTSP tools currently run on the following Linux distributions:
Red Hat 6.0, 6.1, 6.2 and 7.0
SuSE 6.2, 6.3, 6.4, 7.1 and 7.2-beta
Debian 2.0, 2.1 and 2.2
Caldera eDesktop 2.3, 2.4 and eServer 2.3
All the software and documentation needed to run an LTSP network can be obtained from the download section of their web site, http://www.ltsp.org/. The necessary precompiled packages come in both RPM and TGZ formats. Remember to read the documentation before attempting to install the software and scripts.
The Quick Installation requires that your installation meets the following criteria:
You are installing on a Red Hat 6.0, 6.1, 6.2 or 7.0-based system or a Mandrake 7.2-based system.
The server will have an IP address of 192.168.0.254.
The workstations will have addresses in the range of 192.168.0.1 through 192.168.0.253.
Applications will run on the server, displaying output on the workstations.
You are using DHCP.
Download the LTSP RPM packages from the LTSP download site, http://www.ltsp.org/.
lts_core-2.xx-xx.i386.rpm—the Core LTSP package, which contains the root filesystem, configuration utilities and documentation for the workstations.
lts_kernel_xxxx-2.xx-xx.i386.rpm—precompiled kernels for diskless booting. Choose the appropriate kernel for the network card of the diskless workstation.
lts_xxxx-2.xx-xx.i386.rpm—precompiled X servers. Choose the appropriate X server for the video card of the diskless workstation.
Verify that dhcpd is installed on the server. Run the following command:
rpm -qa | grep dhcp
It should report a line like:
dhcp-2.0-5If it doesn't, then you need to load the DHCP RPM from the Red Hat installation CD.
Once the installation of the above packages is complete, you need to move to the /tftpboot/lts/templates directory. Several files there will configure the system files on your server. Each one of these files is responsible for one system file. Take a look at those files, and make sure you agree with what they are going to do. They can potentially make your system vulnerable to intrusion. You may wish to make changes to the system files manually. If you want to do it automatically, then run the ltsp_initialize command:
cd /tftpboot/lts/templates ./ltsp_initialize
Copy the /etc/dhcpd.conf.example file to /etc/dhcpd.conf. Modify the dhcpd.conf file to include the MAC address of the network card in the workstation. Then, add the following line to the /etc/hosts file:
192.168.0.1 ws001You should next edit the /tftpboot/lts/ltsroot/etc/lts.conf file to make sure the entries are correct for the workstation. Then reboot the server and turn on the workstation. You should get a graphical login prompt on the workstation. You can log in using any user ID available on the server.
As you can see, installation of an LTSP network is straightforward, and it can be up and running in a few minutes. Don't forget to follow the instructions carefully, and if you have any difficulties, read the troubleshooting section of the documentation. The project's mailing list is also a good source for solving problems, finding out about new software developments and learning from other users' experiences.
- Geek Guide: The DevOps Toolbox
- Nmap—Not Just for Evil!
- Download "The DevOps Toolbox: Tools and Technologies for Scale and Reliability"
- High-Availability Storage with HA-LVM
- Resurrecting the Armadillo
- March 2015 Issue of Linux Journal: System Administration
- DNSMasq, the Pint-Sized Super Dæmon!
- Real-Time Rogue Wireless Access Point Detection with the Raspberry Pi
- Localhost DNS Cache
- Days Between Dates: the Counting