Linux Software Management

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Two major mainstream of the Linux World: RPM and DPKG

Contents:

1. RPM and DPKG

Distribution representative	Software Management mechanism	Using commands	On-line upgrade mechanism (command)
Red Hat/fedora/centos	Rpm	RPM, Rpmbuild	Yum (yum)
Debian/ubuntu	DPKG	Dpkg	APT (Apt-get)

2. RPM and SRPM

File format	File name format	Direct installation or not	Embedded program Type	Can I modify the parameters and compile
Rpm	xxx.rpm	Can	has been compiled	Not
SRPM	xxx.src.rpm	Not	Original code not compiled	Can

3. What is i386, i586, i686, Noarch, x86_64

Platform Name	For platform description
I386	Almost all x86 platforms, whether old Pentum or new Intel Core 2 and K8 series CPUs, and so on, can work properly! That I refers to the Intel compatible CPU meaning, to 386 needless to say, is the CPU level!
i586	is to optimize the compilation for 586-level computers. What kind of CPU is that? Including Pentum first-generation MMX CPU, AMD K5, K6 series CPU (socket 7 pins) and so on the CPU is considered this level;
i686	The Intel series CPUs after Pentun II, and the CPUs after the K7 level, belong to this 686 level! Since there are almost only p-ii hardware platforms left on the market, many distributions have directly released this level of RPM files.
x86_64	Optimized compilation configuration for 64-bit CPUs, including Intel's Core 2-plus CPU, and AMD's Athlon64-level CPU, belong to this type of hardware platform.
Noarch	Is that there is no hardware level limit. In general, this type of RPM file, there should be no binary program exists, more often appear in the shell script software.

Thanks to the support of the current x86 system, the new CPUs are capable of running the software supported by older CPUs, which means that the hardware is backwards compatible, so the lowest level of i386 software can be installed on all x86 hardware platforms, whether 32-bit or 64-bit. But the reverse is not. For example, the current hardware is mostly 64-bit rated, so you can install x86_64 or i386 RPM software on the hardware. But on your old mainframe, like P-iii/p-4 32-bit machines, you can't install x86_64 software!

Linux Software Management