Debian

In case that you need to find out the exact libc version installed on you Debian Linux system use ldd command. The output of this command will output libc version in its output:

# ldd --version
ldd (Debian EGLIBC 2.13-38+deb7u1) 2.13

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Let’s say you wish to do some changes to nginx source code in
order to add or remove some features before the actual nginx
package installation. In this config we will show how to recompile
nginx package on Debian linux.

First install package building tools:

# apt-get install dpkg-dev

Next, we need to install all nginx build dependencies:

# apt-get build-dep nginx

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This short config will describe a installation of s3cmd Command Line S3 tool on Debian. First update your repository:

# apt-get update

Next, install Python package installer pip which will be later used to install s3cmd:

apt-get install python-pip

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Using jigdo downloader is a smarter and greener way of downloading data from the Internet mirrors. In comparison to a regular download where you point your browser or wget command to a single mirror URL, jigdo allows for multiple mirrors where the main feature is to re-use a previously download ISO image of a lower version to use as base and thus only new packages not downloaded previously are downloaded.

For this reason using jigdo is often faster way of downloading debian ISO images. To start using you first need to install it on your system:

# apt-get install jigdo-file

Once the jigdo-file package is downloaded your can start using jigdo do download official Debian instillation images. All you need is the URL of the *.jigdo file of the image you intend to download. In the example below we download Debian Jessie KDE iso image. First start jigdo:

$ jigdo-lite
Jigsaw Download "lite"
Copyright (C) 2001-2005  |  jigdo@
Richard Atterer          |  atterer.net
Getting mirror information from /etc/apt/sources.list

-----------------------------------------------------------------

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Docker and its Docker.io debian pakcage is currently not available Debian Jessie thus:

 Package 'docker.io' has no installation candidate

The easiest way to install docker is to use get.docker.com script:
First, install curl tool:

# apt-get install curl

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The following lines will describe a procedure on how to mimic Ubuntu’s sudo privilege authorization system on Debian Linux. Sudo allows users to run programs with the authorization privileges of another user by supplying their own password for authentication.

If you have not done so yet, first install sudo package:

# apt-get install sudo

Once sudo is installed run:

# visudo

which allows you to edit the content of /etc/sudoers file. Change the content of this file as show below:

Defaults        env_reset
Defaults        mail_badpass
Defaults        secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"

root    ALL=(ALL:ALL) ALL
%admin ALL=(ALL) ALL
%sudo   ALL=(ALL:ALL) ALL

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So, you’ve decided to try out this thing you heard others talk about, called ‘compiling a custom kernel’. If you are trying this as a hobby, or because you want to learn a new skill, very well – read on.

However, before we start, we will try to explain situations when this need arises and how to deal with it. Note that this is an extensive subject which needs much more in terms of space than we will provide here. You will learn the basics, what you need, what to do and what you’ll achieve.

For more info, as usual, Google is your friend; also , the documentation resident in the kernel source tree will answer lots of questions. So, let’s start with the beginning, with a last note : if need arises, we will publish more articles related to kernel compiling pertaining to other distros.

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