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Tuesday, May 6, 2014

Security " UNIX/Linux "


Security 
Most UNIX flavors have existed for quite some time, and therefore many of the security issues have been discovered and their causes fixed. Even though new security issues are always popping
up, the large installed user base means that fixes are always easy to come by. Plus, many of the users can come up with fixes themselves because the average UNIX administrator is
extremely well versed at fixing their own problems.

Real World Scenario

Application Support " UNIX/Linux "


Application Support
UNIX has plenty of application support because it is the oldest of the NOSes discussed in this chapter. However, it is important to note that applications are usually made to run on the specific
version and flavor of UNIX. For example, an application written for Sun Solaris may not run on SCO UNIX, even though they are both UNIX. Also, a large amount of UNIX software is available for free on the Internet. It can be downloaded and installed, but there may not be any technical support available for it if you get it for free.

File and Print Services "UNIX/Linux"


File and Print Services
As you might expect, UNIX file and print services are TCP/IP based. Therefore, protocols like FTP, NFS, and HTTP are used with standard file sharing. As discussed in Chapter 3, UNIX
printing uses the LPD/LPR combination. But there is UNIX software available that makes UNIX appear as a Windows server. This software is known as Samba. It uses the standard
Server Message Block (SMB) protocol—the same protocol that Windows networking uses.
Samba is freely available on the Internet.

NOTE:
You can check out Samba at the Samba website located at www.samba.org.

Authentication "UNIX/Linux"


Authentication
UNIX can use multiple methods of authentication. It depends on whether the OS is UNIX or Linux and what kind of software is running for authentication, although remember that UNIX
generally uses Internet standard protocols. So, UNIX can use Lightweight Directory Access Protocol (LDAP) or Kerberos for authentication. But there are clients for NDS and AD as well. It
just depends on what kind of software is running on the server or how it has been configured. For example, you can set up a Linux box with an NDS client so it can work with other NetWare
servers. Or, you can set up a UNIX box with its own LDAP server.