Just trying to find out a few things .... Post: 302211473

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Top Forums UNIX for Dummies Questions & Answers Just trying to find out a few things .... Post 302211473 by jim mcnamara on Thursday 3rd of July 2008 12:08:38 PM

07-03-2008

Registered User

The original UNIX from Bell Labs was provided free on a tape. Later on the OS diverged into different directions, like BSD or System V. During the late 80's and early 90's the OS releases became very proprietary - Sun had one, Hewlett Packard another, and so on. This proliferation of UNIX systems also is known as flavors.

Things are opening up in part because of the open source movement. So, everyone realized that having different commands (or C functions) for the same thing or commands with the same name with different behaviors was a bad thing. So we have an alphabet soup of proposed standards.

Currently, POSIX standards are the one most OS developers try to follow. This means that development is easier when you have to write the same code for Solaris, HPUX, and Linux.

The reason we have to know what OS we are talking about is that some have "bizarre"
features. If we give an answer without knowing which flavor, we may give a bad answer. The Solaris version of awk is an example of a kind of bizarre version of a UNIX tool, for example.

Maybe try downloading knoppix, it is smaller than some others. Damn Small Linux is smallest UNIX meant for desktops ~50MB.
DSL information

The download time is a function of your connection speed. If you are at dialup speeds something like knoppix will take overnight. 1.5Mb DSL connection maybe several hours.

jim mcnamara

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LEARN ABOUT CENTOS

uuid_compare

UUID_COMPARE(3) 						    Libuuid API 						   UUID_COMPARE(3)

NAME

       uuid_compare - compare whether two UUIDs are the same

SYNOPSIS

       #include <uuid.h>

       int uuid_compare(uuid_t uu1, uuid_t uu2)

DESCRIPTION

       The uuid_compare function compares the two supplied uuid variables uu1 and uu2 to each other.

RETURN VALUE

       Returns	an  integer less than, equal to, or greater than zero if uu1 is found,	respectively, to be lexicographically less than, equal, or
       greater than uu2.

AUTHOR

       Theodore Y. Ts'o

AVAILABILITY

       libuuid is part of the util-linux package since version 2.15.1 and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

SEE ALSO

       uuid(3), uuid_clear(3), uuid_copy(3), uuid_generate(3), uuid_is_null(3), uuid_parse(3), uuid_unparse(3)

util-linux							     May 2009							   UUID_COMPARE(3)