Linux in Government: Another Look at Linux in the MS Infrastructure

In an article published in IT Week, Roger Howorth discussed lab results that indicated how the latest version of the open-source Samba file and print server software out-performed commercial Windows 2003 Server. The latest version of Samba, the software that helped put Linux on the technology map, has new features that make it compatible with Microsoft Active Directory. Linux thus can authenticate users from an existing Active Directory. As IT Week Labs reported:

Interestingly, IT managers who have deployed Linux with Samba have found that Samba requires less expensive and lower power servers than does the Windows software. Additionally, by using open-source software and Linux, managers can remove the expense of Windows server licenses.

The benchmark tests at IT Week Labs provide a tangible example of why Linux has gained so much server market share. As Howorth writes:

Samba is an open-source implementation of the filesystem deployed by Microsoft. The bundle of standards and protocols behind Microsoft's filesystem originally was called SMB, or the Server Message Block Protocol. Over the years, Microsoft has made SMB the most prevalent filesharing protocol on the planet by shipping it with every Microsoft Windows system, whether desktop or server.

In government networks, Windows and Novell provide the primary server platforms used at every level, from small municipalities to federal agencies. Consequently, anyone considering an alternative desktop must consider how it will work with Microsoft's SMB protocol, which also is referred to as the Common Internet File System (CIFS). Do not let the latter name fool you; Microsoft changed the original name to make people believe SMB is an Internet standard.

SMB, or CIFS, allows Windows machines to share directories, files, printers and other computer resources within a network. The protocols and services included in SMB, which are called a following or a bundle, enable tasks such as introducing new hosts, name resolution, authentication and access control. Each service operates independently, but to the user it all looks like a single protocol.

SMB helps each desktop find and identify shared resources. It also controls access to those resources so unauthorized users cannot access them. Within this environment, Samba allows Linux desktops to look and act like Windows desktops.

SMB has been available for open-source operating systems such as Linux for several years, thanks to Samba. And as Linux began its move out of the datacenter and onto the corporate desktop, Samba helped Linux become part of the Microsoft network neighborhood. In fact, back in 1999, companies such as Cisco discovered that their engineers had replaced NT Servers with Linux machines running Samba. These companies were alerted to the presence of Linux and Samba by IT auditors who wondered why those servers did not need rebooting. As companies began discovering Linux in their organizations, word spread and a grass-roots movement gained management acceptability.

Some of the services included in Samba came from published standards. Many remained undocumented by Microsoft and have changed with each Windows version. In current lingo, people use CIFS when referring to the entire suite of services and SMB when discussing the filesharing protocol that allows one to see the network and its resources in the network neighborhood.