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.Another source of informationon UUCP is the book Managing UUCP and USENET, by Tim O Reilly and Grace Todino.See Appendix A for more information.6.4 Networking with Microsoft Systems.Samba is a suite of programs which work together to allow clients to access to a server sfilespace and printers via the SMB (Server Message Block) protocol.Initially written forUnix, Samba now also runs on Netware, OS/2 and VMS.In practice, this means that you can redirect disks and printers to Linux disks and print-ers from Lan Manager clients, Windows for Workgroups 3.11 clients, Windows NT clients,Linux clients and OS/2 clients.This gives the capability for these operating systems tobehave much like a LAN Server or Windows NT Server machine, only with added func-tionality and flexibility designed to make life easier for administrators.Samba: Integrating UNIX and Windows contains complete information on con-figuring and using Samba under Linux.The Samba home pages are located athttp://samba.anu.edu.au/samba/ and the SMB HOWTO should also be of help.6.5 Electronic mail.Like most UNIX systems, Linux provides a number of software packages for usingelectronic mail.E-mail on your system can either be local (that is, you only mail otherusers on your system), or networked (that is, you mail, using either TCP/IP or UUCP, userson other machines on a network).E-mail software usually consists of two parts: a mailerand a transport.The mailer is the user-level software which is used to actually composeand read e-mail messages.Popular mailers include elm and mailx.The transport isthe low-level software which actually takes care of delivering the mail, either locally orremotely.The user never sees the transport software; they only interact with the mailer.However, as the system administrator, it is important to understand the concepts behind thetransport software and how to configure it.The most popular transport software for Linux is sendmail.It is able to send bothlocal and remote TCP/IP and UUCP e-mail.An alternative tosendmailisSmail.The Linux Mail HOWTO gives more information on the available mail software for 6.6.News and Usenet.293Linux and how to configure it on your system.If you plan to send mail remotely, you llneed to understand either TCP/IP or UUCP, depending on how your machine is networked(see Sections 6.1 and 6.3).The UUCP and TCP/IP documents listed in Appendix A shouldbe of help there.Most of the Linux mail software can be retrieved via anonymous FTP fromsunsite.unc.eduin the directory/pub/Linux/system/Mail.6.6 News and Usenet.Linux also provides a number of facilities for managing electronic news.You maychoose to set up a local news server on your system, which will allow users to post articles to various news groups on the system.alivelyformof discussion.However, if you haveaccess to a TCP/IP or UUCP network, then you will be able to participate in Usenet aworldwide network news service.There are two parts to the news software the server and the client.The news serveris the software which controls the news groups and handles delivering articles to othermachines (if you are on a network).The news client, or news reader, is the software whichconnects to the server to allow users to read and post news.There are several forms of news servers available for Linux.They all follow the samebasic protocols and design.The two primary versions are C News and INN .There aremany types of news readers, as well, such as rn and tin.The choice of news reader ismore or less a matter of taste; all news readers should work equally well with different ver-sions of the server software.That is, the news reader is independent of the server software,and vice versa.If you only want to run news locally (that is, not as part of Usenet), then you will needto run a server on your system, as well as install a news reader for the users.The newsserver will store the articles in a directory such as /var/spool/news, and the newsreader will be compiled to look in this directory for news articles.However, if you wish to run news over the network, there are several options opento you.TCP/IP network-based news uses a protocol known as NNTP (Network NewsTransmission Protocol).NNTP allows a news reader to read news over the network, ona remote machine.NNTP also allows news servers to send articles to each other over thenetwork this is the software upon which Usenet is based.Most businesses and universitieshave one or more NNTP servers set up to handle all of the Usenet news for that site.Everyother machine at the site runs an NNTP-based news reader to read and post news over thenetwork via the NNTP server.This means that only the NNTP server actually stores the 294 Advanced Featuresnews articles on disk.Here are some possible scenarios for news configuration.You run news locally.That is, you have no network connection, or no desire torun news over the network.In this case, you need to run C News or INN on yourmachine, and install a news reader to read the news locally.You have access to a TCP/IP network and an NNTP server.If your organization hasan NNTP news server set up, you can read and post news from your Linux machineby simply installing an NNTP-based news reader.(Most news readers available canbe configured to run locally or use NNTP).In this case, you do not need to install anews server or store news articles on your system.The news reader will take care ofreading and posting news over the network.Of course, you will need to have TCP/IPconfigured and have access to the network (see Section 6.1).You have access to a TCP/IP network but have no NNTP server.In this case, youcan run an NNTP news server on your Linux system.You can install either a local oran NNTP-based news reader, and the server will store news articles on your system.In addition, you can configure the server to communicate with other NNTP newsservers to transfer news articles.You want to transfer news using UUCP.If you have UUCP access (see Section 6.3),you can participate in Usenet as well.You will need to install a (local) news serverand a news reader.In addition, you will need to configure your UUCP software toperiodically transfer news articles to another nearby UUCP machine (known as your news feed ).UUCP does not use NNTP to transfer news; simply, UUCP providesits own mechanism for transferring news articles.Most of the standard news software (available via anonymous FTP fromftp.uu.net in the directory /news) will compile out-of-the box on Linux.Neces-sary patches can be found on sunsite.unc.edu in /pub/Linux/system/Mail(which is, incidentally, also where mail software for Linux is found).Other news binariesfor Linux may be found in this directory as well.For more information, refer to the Linux News HOWTO from sunsite.unc.eduin/pub/Linux/docs/HOWTO.Also, the LDP s Linux Network Administrator s Guidecontains complete information on configuring news software for Linux.The bookManaging UUCP and Usenet, by Tim O Reilly and Grace Todino, is an excellentguide to setting up UUCP and news software.Also of interest is the Usenet docu- News and Usenet 295ment How to become a Usenet site, available from ftp.uu.net, in the directory/usenet/news.announce.newusers
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