1
00:00:06,540 --> 00:00:08,750
In this video you'll
learn about software packages.

2
00:00:09,949 --> 00:00:14,724
A package is a tarball with some additions,
and these additions are a script to copy

3
00:00:14,724 --> 00:00:19,500
files to the right location and also a
database to keep track of what is installed.

4
00:00:20,280 --> 00:00:24,054
Packages typically focus on the
software that they want to install,

5
00:00:24,054 --> 00:00:27,829
and they are written to
use dependencies for related software packages.

6
00:00:29,079 --> 00:00:32,754
That means that for common features,
dependencies need to be installed before

7
00:00:32,754 --> 00:00:36,429
you can install the package or
while you are installing the package.

8
00:00:37,030 --> 00:00:43,219
Now, RPM is the standard package format in Red
Hat, and DAP is the standard package format in Ubuntu.

9
00:00:43,859 --> 00:00:46,039
Let me show you how
you can work with these packages.

10
00:00:47,259 --> 00:00:50,820
So the most important thing that
you do with packages is query them.

11
00:00:51,520 --> 00:00:57,990
So when I'm using a command like RPM
qa, I'm querying all packages that are currently

12
00:00:57,990 --> 00:01:04,460
in the RPM database and that might be
convenient if you are looking for something. So

13
00:01:04,460 --> 00:01:10,930
rpm, qa, pipe grab, nmap, for instance,
is showing that the NMAP package was installed.

14
00:01:11,489 --> 00:01:16,449
And if you want to know what's going
on in these packages, use RPM QL on

15
00:01:16,449 --> 00:01:21,409
your package and that is giving a
list of all the files within the package.

16
00:01:22,069 --> 00:01:27,469
But working with packages is not really the
way how you want to do it nowadays.

17
00:01:28,450 --> 00:01:33,099
Nevertheless, let's also have a quick look
at Ubuntu. So here we are on Ubuntu.

18
00:01:33,900 --> 00:01:38,635
D package is the name of
the utility, and dpackage L is

19
00:01:38,635 --> 00:01:43,370
showing a list of all the
packages that are installed on Ubuntu.

20
00:01:44,489 --> 00:01:48,094
Again, that is checking out
the package database and that

21
00:01:48,094 --> 00:01:51,700
allows you to figure
out which packages you've got.

22
00:01:52,200 --> 00:01:56,219
But don't worry about these packages
too much. Worry about package managers.