Simple guide to install SSH on Ubuntu

 SSH is one of the most widely used methods to access Linux & Unix servers. SSH provides an encrypted method to access & communicate between servers over insecure networks. In  technical term, it’s a cryptographic protocol that allows for secured, encrypted communication between a host & a client.

In most of the Linux distributions, SSH comes installed & we can access those servers using ssh command but with Ubuntu Desktop (& based distros) that is not the case. We are required to install SSH on Ubuntu to be able access it.

Though we have an ssh client available on Ubuntu, it’s the ssh server that we need to install on Ubuntu. It means we can access other servers from Ubuntu using ssh but other machines will not be able to access our Ubuntu systems.

Install SSH on Ubuntu

SSH server is available with default Ubuntu repositories & we are not required to add any other repos to install it. We only need to run the following command to install it,

$ sudo apt update && sudo apt install openssh-server

Once installed, the ssh server will start on it’s own, but it required we can start it using the following command,

$ sudo systemctl start ssh

Check status with,

$ sudo systemctl status ssh

 Note: If you have your firewall enabled on your Ubuntu system, then you would also be required to enable the ssh connections through the firewall. Run the following command to do so,

$ sudo ufw allow ssh

We can now access our Ubuntu system from other servers. Just open a ssh client & run the ssh command to access it,

$ ssh user@IP_ADDRESS

Ubuntu : "CLIPGRAB" Dedicated software for Video Downloader for Ubuntu

Dedicated software for Video Downloader for Ubuntu

Clipgrab

Clipgrab is yet another useful tool that helps you download videos from Youtube and other sites such as Vimeo and Daily Motion. With just a few clicks, you simply copy the Video Url and paste it in Clipgrab, as you define the resolution then finally hit Grab this Clip button.

To install Clipgrab, use the official PPA by the Clipgrab team.

# add-apt-repository ppa:clipgrab-team/ppa

Update the System

# apt update

Install Clipgrab

# apt install clipgrab

To launch Clipgrab run

# clipgrab

Ubuntu 16.04 Developer Tools Installation

Ubuntu 16.04 Developer Tools Installation

First things first !

sudo apt update
sudo apt upgrade

Standard Developer Tools

sudo apt-get install build-essential git

Virtualbox Guest Utlities for Shared Drive and Clipboard (optional)

sudo apt install dkms build-essential linux-headers-`uname -r`
sudo apt install virtualbox-guest-utils virtualbox-guest-dkms
# To access shared drive on nautilus folder
sudo addgroup <YOUR USERNAME> vboxsf

Python Development

sudo apt-get install python-dev python-pip python-virtualenv python-numpy python-matplotlib

Virtualenv Wrapper Installation

sudo pip install virtualenvwrapper
echo "source /usr/local/bin/virtualenvwrapper.sh" >> ~/.bashrc
# Create Virtualenv (env location is ~/.virtualenvs)
mkvirtualenv <env_name>
# select virtualenv
workon <env_name>

pip packages

For Machine Learning

# Create Virtualenv
mkvirtualenv ML
# Activate it
workon ML
# Install packages (if behinde proxy use pip install --proxy=<proxy_address>)
pip install scipy scikit-learn matplotlib jupyter pandas numpy tensorflow keras seaborn

For Web Development

# Create Virtualenv
mkvirtualenv web
# Activate it
workon web
# Install packages (if behinde proxy use pip install --proxy=<proxy_address>)
pip install django beautifulsoup4 requests ipython

Compiler Development

sudo apt install flex bison

Networking tools

sudo apt install libpcap-dev libnet1-dev rpcbind openssh-server nmap

Computer Vision or Image Processing with OpenCV

sudo apt install python-numpy
cd ~
# Clone latest codebase for opencv (do git checkout for specific version)
git clone https://github.com/Itseez/opencv.git
# Clone opencv contrib plugins
git clone https://github.com/Itseez/opencv_contrib.git
# install prerequisites
sudo apt-get install cmake pkg-config libjpeg8-dev libtiff-dev libjasper-dev libpng12-dev libgtk2.0-dev libavcodec-dev libavformat-dev libswscale-dev libv4l-dev libatlas-base-dev gfortran libopencv-dev build-essential checkinstall cmake pkg-config yasm libtiff5-dev libjpeg-dev libjasper-dev libavcodec-dev libavformat-dev libswscale-dev libdc1394-22-dev libxine2-dev libgstreamer0.10-dev libgstreamer-plugins-base0.10-dev libv4l-dev python-dev python-numpy libtbb-dev libqt4-dev libgtk2.0-dev libfaac-dev libmp3lame-dev libopencore-amrnb-dev libopencore-amrwb-dev libtheora-dev libvorbis-dev libxvidcore-dev x264 v4l-utils ffmpeg libgphoto2-dev
# Start Build Process
cd opencv
mkdir build
cd build
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib/modules -D BUILD_EXAMPLES=ON -D WITH_QT=ON -D WITH_OPENGL=ON ..
make -j4
sudo make install
sudo ldconfig


Parallel Processing with OpenMPI

#install pre-requisites
sudo apt-get install libibnetdisc-dev
# download codebase
wget https://www.open-mpi.org/software/ompi/v1.10/downloads/openmpi-1.10.2.tar.gz
# extract
tar -xzvf openmpi-1.10.2.tar.gz
# configure and build
./configure --prefix="~/.openmpi"
make -j4
sudo make install
echo "export PATH=$PATH:$HOME/.openmpi/bin" >> ~/.bashrc
echo "export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$HOME/.openmpi/lib/" >> ~/.bashrc


Android tools

sudo apt install android-tools-adb android-tools-fastboot


Media tools

sudo apt install flashplugin-installer vlc ffmpeg


Editor

install vim

sudo apt install vim


Install Atom Editor download

sudo dpkg -i atom-amd64.dev


Install Visual Studio Code download

sudo dpkg -i code_<version>.deb


Ubuntu Customization (Theme and Icons)

Install Gnome Tweak Tool

sudo apt install gnome-tweak-tool

# Create Theme and Icon directory
mkdir ~/.icons ~/.themes


Download Themes and Icons, Place it under respective directory and open tweak tool select your themes

Suggested Themes and

Flatabulous
Paper-Theme
Paper-Icon-Theme


Install ZSH

sudo apt install zsh
curl -L https://github.com/robbyrussell/oh-my-zsh/raw/master/tools/install.sh | sh
chsh -s `which zsh`


Web Development in PHP with Apache2 Web Server

#Install apache2 and php
sudo apt install apache2 apache2-utils libapache2-mod-php
sudo apt install php php-dev php-mcrypt php-mysql php-mbstring php-dom
# Enable mod_rewrite for apache2
sudo a2enmod rewrite


Configure index.php for priorities add index.php sudo nano /etc/apache2/mods-available/dir.conf
<IfModule mod_dir.c>
 DirectoryIndex index.php index.html index.cgi index.pl index.xhtml index.htm
</IfModule>


Configure Mod Rewrite sudo nano /etc/apache2/sites-available/000-default.conf
<VirtualHost *:80>
 ServerAdmin webmaster@localhost
 DocumentRoot /var/www/html

    <Directory /var/www/html>
        Options FollowSymLinks MultiViews Indexes
        AllowOverride All
        Order allow,deny
        allow from all
    </Directory>

 ErrorLog ${APACHE_LOG_DIR}/error.log
 CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>


Reload Apache sudo service apache2 restart

Java Development

# install jdk
sudo apt install openjdk-8-jdk
# install maven
sudo apt install maven


Install eclipse dowload

Ruby Development

# install pre requisites
sudo apt-get install git-core curl zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev python-software-properties libffi-dev

# clone rbenv
git clone https://github.com/rbenv/rbenv.git ~/.rbenv
git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build
git clone https://github.com/rbenv/rbenv-gem-rehash.git ~/.rbenv/plugins/rbenv-gem-rehash

# add configuration to bashrc
echo "export PATH=$PATH:$HOME/.rbenv/bin:$HOME/.rbenv/shims" >> ~/.bashrc
echo "eval $(rbenv init -)" >> ~/.bashrc
echo "export PATH=$HOME/.rbenv/plugins/ruby-build/bin:$PATH" >> ~/.bashrc
# install and set specific ruby version
rbenv install 2.3.0
rbenv global 2.3.0
# install some gems
gem install bundler jekyll mysql2 rails jekyll-pagedown


Database

# install nosql database
sudo apt install mongodb-server
# install sqlite3 for smaller db
sudo apt install libsqlite3-dev sqlite3
# mysql community version installation
sudo apt install mysql-server libmysqlclient-dev


NodeJs Development

curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash -
sudo apt-get install -y nodejs
sudo npm install -g grunt-cli yarn @angular/cli


ASP.NET Development

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF
echo "deb http://download.mono-project.com/repo/debian wheezy main" | sudo tee /etc/apt/sources.list.d/mono-xamarin.list
sudo apt update
# install mono libraries
sudo apt install mono-devel mono-complete referenceassemblies-pcl ca-certificates-mono mono-xsp4
# install mono ide
sudo apt install monodevelop-nunit monodevelop-versioncontrol monodevelop-database


CLoud Storage (Dropbox)

cd ~ && wget -O - "https://www.dropbox.com/download?plat=lnx.x86_64" | tar xzf -
# to start dropbox
sh ~/.dropbox-dist/dropboxd

Install Microsoft Windows Fonts In Ubuntu 18.04 LTS

Most of the educational institutions are still using Microsoft Fonts. I am not sure about other countries. But, in Tamilnadu (An Indian state), Times New Roman and Arial fonts are being mostly used by almost all sorts of documentation works, projects, and assignments in colleges and schools. Not only the educational institutions, some small organizations, offices, and shops are still using MS Windows Fonts. Just in case, if you are in a situation where you need to use Microsoft fonts in your Ubuntu Linux desktop, here is how to do it.

Disclaimer: Microsoft has released its core fonts for free. However, Please be aware that usage of Microsoft fonts is prohibited in other operating systems. Read the EULA carefully before installing MS Fonts in any Linux operating system. We (OSTechNix) are not responsible for any kind of piracy act.

Install MS Fonts in Ubuntu 18.04 LTS desktop

Install MS TrueType Fonts as shown below:

$ sudo apt update

$ sudo apt install ttf-mscorefonts-installer

Microsoft’s End user agreement wizard will appear. Click OK to continue.

Click Yes to accept the Microsoft agreement:

After installing the fonts, we need to update the font cache using command:

$ sudo fc-cache -f -v

Sample output:

/usr/share/fonts: caching, new cache contents: 0 fonts, 6 dirs
/usr/share/fonts/X11: caching, new cache contents: 0 fonts, 4 dirs
/usr/share/fonts/X11/Type1: caching, new cache contents: 8 fonts, 0 dirs
/usr/share/fonts/X11/encodings: caching, new cache contents: 0 fonts, 1 dirs
/usr/share/fonts/X11/encodings/large: caching, new cache contents: 0 fonts, 0 dirs
/usr/share/fonts/X11/misc: caching, new cache contents: 89 fonts, 0 dirs
/usr/share/fonts/X11/util: caching, new cache contents: 0 fonts, 0 dirs
/usr/share/fonts/cMap: caching, new cache contents: 0 fonts, 0 dirs
/usr/share/fonts/cmap: caching, new cache contents: 0 fonts, 5 dirs
/usr/share/fonts/cmap/adobe-cns1: caching, new cache contents: 0 fonts, 0 dirs
/usr/share/fonts/cmap/adobe-gb1: caching, new cache contents: 0 fonts, 0 dirs
/usr/share/fonts/cmap/adobe-japan1: caching, new cache contents: 0 fonts, 0 dirs
/usr/share/fonts/cmap/adobe-japan2: caching, new cache contents: 0 fonts, 0 dirs
/usr/share/fonts/cmap/adobe-korea1: caching, new cache contents: 0 fonts, 0 dirs
/usr/share/fonts/opentype: caching, new cache contents: 0 fonts, 2 dirs
/usr/share/fonts/opentype/malayalam: caching, new cache contents: 3 fonts, 0 dirs
/usr/share/fonts/opentype/noto: caching, new cache contents: 24 fonts, 0 dirs
/usr/share/fonts/truetype: caching, new cache contents: 0 fonts, 46 dirs
/usr/share/fonts/truetype/Gargi: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/Gubbi: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/Nakula: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/Navilu: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/Sahadeva: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/Sarai: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/abyssinica: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/dejavu: caching, new cache contents: 6 fonts, 0 dirs
/usr/share/fonts/truetype/droid: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/fonts-beng-extra: caching, new cache contents: 6 fonts, 0 dirs
/usr/share/fonts/truetype/fonts-deva-extra: caching, new cache contents: 3 fonts, 0 dirs
/usr/share/fonts/truetype/fonts-gujr-extra: caching, new cache contents: 5 fonts, 0 dirs
/usr/share/fonts/truetype/fonts-guru-extra: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/fonts-kalapi: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/fonts-orya-extra: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/fonts-telu-extra: caching, new cache contents: 2 fonts, 0 dirs
/usr/share/fonts/truetype/freefont: caching, new cache contents: 12 fonts, 0 dirs
/usr/share/fonts/truetype/kacst: caching, new cache contents: 15 fonts, 0 dirs
/usr/share/fonts/truetype/kacst-one: caching, new cache contents: 2 fonts, 0 dirs
/usr/share/fonts/truetype/lao: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/liberation: caching, new cache contents: 16 fonts, 0 dirs
/usr/share/fonts/truetype/liberation2: caching, new cache contents: 12 fonts, 0 dirs
/usr/share/fonts/truetype/lohit-assamese: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/lohit-bengali: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/lohit-devanagari: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/lohit-gujarati: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/lohit-kannada: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/lohit-malayalam: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/lohit-oriya: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/lohit-punjabi: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/lohit-tamil: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/lohit-tamil-classical: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/lohit-telugu: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/malayalam: caching, new cache contents: 11 fonts, 0 dirs
/usr/share/fonts/truetype/msttcorefonts: caching, new cache contents: 60 fonts, 0 dirs
/usr/share/fonts/truetype/noto: caching, new cache contents: 2 fonts, 0 dirs
/usr/share/fonts/truetype/openoffice: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/padauk: caching, new cache contents: 4 fonts, 0 dirs
/usr/share/fonts/truetype/pagul: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/samyak: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/samyak-fonts: caching, new cache contents: 3 fonts, 0 dirs
/usr/share/fonts/truetype/sinhala: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/tibetan-machine: caching, new cache contents: 1 fonts, 0 dirs
/usr/share/fonts/truetype/tlwg: caching, new cache contents: 58 fonts, 0 dirs
/usr/share/fonts/truetype/ttf-khmeros-core: caching, new cache contents: 2 fonts, 0 dirs
/usr/share/fonts/truetype/ubuntu: caching, new cache contents: 13 fonts, 0 dirs
/usr/share/fonts/type1: caching, new cache contents: 0 fonts, 1 dirs
/usr/share/fonts/type1/gsfonts: caching, new cache contents: 35 fonts, 0 dirs
/usr/local/share/fonts: caching, new cache contents: 0 fonts, 0 dirs
/home/sk/.local/share/fonts: skipping, no such directory
/home/sk/.fonts: skipping, no such directory
/var/cache/fontconfig: cleaning cache directory
/home/sk/.cache/fontconfig: cleaning cache directory
/home/sk/.fontconfig: not cleaning non-existent cache directory
fc-cache: succeeded

Install MS Fonts in Dual boot with Linux and Windows

If you have dual boot system with Linux and Windows operating system, you can easily install the MS fonts from Windows C drive. All you have to do is mount the Windows partition (C:/Windows).

I assume you have mounted the C:\Windows partition at /Windowsdrive directory in linux.

Now, link the fonts location to your Linux system’s fonts folder as shown below.

ln -s /Windowsdrive/Windows/Fonts /usr/share/fonts/WindowsFonts

After linking the fonts folder, regenerate the fontconfig cache using command:

fc-cache

Alternatively, copy all Windows fonts to /usr/share/fonts directory and install the fonts using the following commands:

mkdir /usr/share/fonts/WindowsFonts

cp /Windowsdrive/Windows/Fonts/* /usr/share/fonts/WindowsFonts

chmod 755 /usr/share/fonts/WindowsFonts/*

Finally, regenerate the fontconfig cache using command:

fc-cache

Test Windows font

Open LibreOffice or GIMP after installing MS Fonts. Now, you will see there the Microsoft coretype fonts.

That’s it. Hope this guide useful. Again, I warn you usage of MS fonts in other operating system is prohibited. Please read the Microsoft License agreement before installing the MS fonts.