1
using CentOS 6.8, when I type yum install tcpdump
, system outputs:
Package 14:tcpdump-4.0.0-11.20090921gitdf3cb4.2.el6.x86_64 already installed and latest version
This long piece of string didn't help, to get more information, I typed yum info tcpdump
, which returned following:
Name : tcpdump
Arch : x86_64
Epoch : 14
Version : 4.0.0
Release : 11.20090921gitdf3cb4.2.el6
Size : 818 k
Repo : installed
From repo : base
... bla bla ...
it divided the original package name string to several fields, What I am interested in are these two fields: Epoch
Release
.
- What is
Epoch
? some info here, but not very enlightening - How is
Release
field (11.20090921gitdf3cb4.2.el6
) named? what is the convention?
1Epoch information, essentially an extension to the version number to "absolutely" declare a package newer. The convention for version probably depends on the maintainer/repository. In that case it's like from a git build from the date 2009-09-21. The last bit might indicate a commit and a version number. The eleven up front? No idea. There is no fixed, universal naming scheme. – Seth – 2017-08-02T11:08:21.483