Ubuntu Blog: July 2015

Intro

LinuxBrew is a Linux-fork of the popular Mac OS X HomeBrew package manager.
LinuxBrew is package-management-software, which enables installing packages from source, on top on the system's default package management (e.g. "apt/deb" in Debian/Ubuntu and "yum/rpm" in CentOS/RedHat).

Why Use LinuxBrew ?

HomeBrew was originally developed for Mac OS X (which does not have a standard open-source package-management system). It superceded package-managements such as MacPorts and Fink. LinuxBrew is homebrew ported to Linux.
Most Linux distributions have a good package management system (e.g. "apt/deb" in Debian/Ubuntu and "yum/rpm" in CentOS/RedHat), however
- Packages in the standard repositories are often older than the latest available versions, and
- Many open-source packages are not available in the standard repositories (e.g. common bioinformatics tools).
LinuxBrew provides a repository of software installation recipes (packages are installed from source and compiled on the local machine) to complement the packages from the distribution's standard repository.
LinuxBrew provides an easy method to build your own repositories (i.e. list of open-source packages tailored to your needs).
LinuxBrew installs software in user-specified directory (not system-wide), and does not require sudo access.
LinuxBrew (and HomeBrew) integrates very well with GitHub, enabling sharing of installation recipes easily.

Especially with DigitalOcean, which (at the time of this writing) does not provide sharable Droplet Images (with custom-configured installed software), a LinuxBrew repository can provide a quick method to install specific packages and versions on a standard Linux machine.

The Gist of LinuxBrew

Simply put, LinuxBrew takes care of downloading the tar.gz file and running ./configure && make && make install for you (or whichever commands are needed to install the package).
A LinuxBrew Formula is a Ruby script which defines where to find the tar.gz file, how to build the package, and how to install it.
A formula file can be as simple as hmmer.rb (a bioinformatics tool):

class Hmmer < Formula
  homepage 'http://hmmer.janelia.org/'
  url 'http://selab.janelia.org/software/hmmer3/3.1b1/hmmer-3.1b1.tar.gz'

  def install
    system "./configure", "--prefix=#{prefix}"
    system "make"
    system "make install"
  end
end

Or as complicated as emacs.rb.
Once a formula file is properly defined, installing the package is simply a matter of running:

$ brew install FORMULA

Preparing for LinuxBrew - Debian/Ubuntu

For Debian/Ubuntu-based systems, run the following commands:

$ sudo apt-get update
$ sudo apt-get upgrade -y
$ sudo sudo apt-get install -y build-essential make cmake scons curl git \
                               ruby autoconf automake autoconf-archive \
                               gettext libtool flex bison \
                               libbz2-dev libcurl4-openssl-dev \
                               libexpat-dev libncurses-dev

Preparing for LinuxBrew - CentOS/RedHat

For RedHat/CentOS-based systems, run the following commands:

$ sudo yum update -y
$ sudo yum groupinstall -y "Development Tools"
$ sudo yum install -y \
        autoconf automake19 libtool gettext \
        git scons cmake flex bison \
        libcurl-devel curl \
        ncurses-devel ruby bzip2-devel expat-devel

Installing LinuxBrew

Installing LinuxBrew is simply a matter of cloning the LinuxBrew Repository.

Step 1 - Clone LinuxBrew

To keep things tidy, clone LinuxBrew into a hidden directory in the user's home directory:

$ git clone https://github.com/Homebrew/linuxbrew.git ~/.linuxbrew

But any other directory would work just as well.

Step 2 - Update environment variables

The next step is to add LinuxBrew to the user's environment variables.
Add the following lines to the end of the user's ~/.bashrc file:

# Until LinuxBrew is fixed, the following is required.
# See: https://github.com/Homebrew/linuxbrew/issues/47
export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:/usr/local/lib64/pkgconfig:/usr/lib64/pkgconfig:/usr/lib/pkgconfig:/usr/lib/x86_64-linux-gnu/pkgconfig:/usr/lib64/pkgconfig:/usr/share/pkgconfig:$PKG_CONFIG_PATH
## Setup linux brew
export LINUXBREWHOME=$HOME/.linuxbrew
export PATH=$LINUXBREWHOME/bin:$PATH
export MANPATH=$LINUXBREWHOME/man:$MANPATH
export PKG_CONFIG_PATH=$LINUXBREWHOME/lib64/pkgconfig:$LINUXBREWHOME/lib/pkgconfig:$PKG_CONFIG_PATH
export LD_LIBRARY_PATH=$LINUXBREWHOME/lib64:$LINUXBREWHOME/lib:$LD_LIBRARY_PATH

NOTE: If you installed LinuxBrew to a different directory, change the path in LINUXBREWHOME above.

Step 3 - Test installation

To ensure those changes take effect, log-out and log-in again. The shell should then use these new settings.
To test these new settings, try:

$ which brew
/home/ubuntu/.linuxbrew/bin/brew
$ echo $PKG_CONFIG_PATH
/home/ubuntu/.linuxbrew/lib64/pkgconfig:/home/ubuntu/.linuxbrew/lib/pkgconfig:/usr/local/lib/pkgconfig:/usr/local/lib64/pkgconfig:/usr/lib64/pkgconfig:/usr/lib/pkgconfig:/usr/lib/x86_64-linux-gnu/pkgconfig:/usr/lib64/pkgconfig:/usr/share/pkgconfig:

Installing Packages with LinuxBrew

Which packages are available?

Type brew search to see the list of all available packages (all the packages that the current installation of LinuxBrew knows about – see below about adding repositories).
Type brew search WORD to see all the packages (called Formulas in HomeBrew jargon) which contain WORD. Example:

$ brew search xml
blahtexml       libnxml   libxml2     xml-coreutils   xml2        xmlrpc-c
html-xml-utils  libwbxml  libxmlsec1  xml-security-c  xmlcatmgr   xmlsh
libmxml         libxml++  tinyxml     xml-tooling-c   xmlformat   xmlstarlet

Install a package

To install a package, run brew install PACKAGE.
Example, installing jq - JSON processor:

$ brew install jq
==> Downloading http://stedolan.github.io/jq/download/source/jq-1.3.tar.gz
==> ./configure
==> make
/home/ubuntu/.linuxbrew/Cellar/jq/1.3: 7 files, 256K, built in 10 seconds
$ which jq
/home/ubuntu/.linuxbrew/bin/jq
$ jq --version
jq version 1.3

LinuxBrew's usefulness is apparent: While Ubuntu has jq in the latest repositories, its version is old (1.2). Debian Stable and Testing don't have jq package at all. LinuxBrew's version is the most recent one (1.3). Addionally, LinuxBrew installs the program to a path which will not conflict with the system's default location.

Adding Existing HomeBrew Repositories

HomeBrew/LinuxBrew repositories are called TAPS. These are simply GitHub repositories containing Ruby scripts ('Formulas'). The HomeBrew Githab User has several common repositories.
Example: adding the homebrew-science repository (containing many useful open-source scientific programs) and the HomeBrew-Games repository:

$ brew tap homebrew/science
Cloning into '/home/ubuntu/.linuxbrew/Library/Taps/homebrew-science'...
Tapped 237 formula
$ brew tap homebrew/games
Cloning into '/home/ubuntu/.linuxbrew/Library/Taps/homebrew-games'...
Tapped 57 formula

List available taps:

$ brew tap
homebrew/science
homebrew/games

Install any package from those repositories:

$ brew install gnu-go
==> Downloading http://ftpmirror.gnu.org/gnugo/gnugo-3.8.tar.gz
#################################################################
==> ./configure --prefix=/home/ubuntu/.linuxbrew/Cellar/gnu-go/3.8 --with-readline=/usr/lib
==> make install
/home/ubuntu/.linuxbrew/Cellar/gnu-go/3.8: 9 files, 7.0M, built in 60 seconds

Updating TAPs and Packages

To download any updates to Formulas, run:

$ brew update

To upgrade packages (if updates are available), run:

$ brew upgrade PACKAGE

Creating Custom/Private TAPs (Repositories)

A HomeBrew TAP/Repository is simply a collection of Formulas – Ruby scripts stored in local files or in GitHub repositories.

Formulas in local files

To install a formula from a local file, run:

$ brew install /full/path/to/file.rb

This is useful when creating (and debugging) a new formula.

Formulas in GitHub repositories

To create a custom TAP repository in github, Create a new GitHub repository (in your user's github account) and name it homebrew-NAME. It must start with 'homebrew-' to work as a HomeBrew/LinuxBrew tap. NAME can be any name you want.
Example:
GitHub user agordon has a HomeBrew repository named gordon, the full URL is: https://github.com/agordon/homebrew-gordon.
To use this repository ("tap it"):

$ brew tap agordon/gordon
Cloning into '/home/ubuntu/.linuxbrew/Library/Taps/agordon-gordon'...
Warning: Could not tap agordon/gordon/libestr over Homebrew/homebrew/libestr
Warning: Could not tap agordon/gordon/coreutils over Homebrew/homebrew/coreutils
Tapped 12 formula

NOTES

brew tap used the username agordon and the repository suffix gordon (suffix of 'homebrew-gordon') and deduced the github URL to access.
Formulas in custom repostiries can conflict with formulas in the official HomeBrew repositories. That is perfectly normal. See below on how to install such packages.

To install non-conflicting packages from custom repositories, run:

$ brew install libjson

To install packages from specific taps, run:

$ brew install agordon/gordon/coreutils

Source from https://www.digitalocean.com

1. Install ruby: Paste the below command at terminal and hit
enter


sudo apt-get install build-essential curl git m4 ruby texinfo libbz2-dev libcurl4-openssl-dev libexpat-dev libncurses-dev zlib1g-dev
2.Install linux brew:Paste the below command at terminal and
hit enter 



ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/linuxbrew/go/install)"
3.set path for brew


Type: gedit.bashrc at terminal and copy paste following into the
.bashrc file


export PATH="$HOME/.linuxbrew/bin:$PATH"
export MANPATH="$HOME/.linuxbrew/share/man:$MANPATH"
export INFOPATH="$HOME/.linuxbrew/share/info:$INFOPATH"
4.Install node:Paste the below commands one by one at terminal and
hit enter 



brew update
brew install node
brew link node
5.Install appium


npm install -g appium

npm install wd
To start appium: Paste the below command at terminal and hit enter



appium
Here I have created youtube Playlist for appium android application automation

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How To Install and Use LinuxBrew on a Linux VPS