Abdallah Okasha abdallahokasha

** First of all you should install dependencies sudo apt-get update sudo apt-get install -y build-essential sudo apt-get install -y cmake sudo apt-get install -y libgtk2.0-dev sudo apt-get install -y pkg-config sudo apt-get install -y python-numpy python-dev sudo apt-get install -y libavcodec-dev libavformat-dev libswscale-dev sudo apt-get install -y libjpeg-dev libpng-dev libtiff-dev libjasper-dev

To install zsh run: (1) > sudo apt-get install zsh

We can run step (2) to see installed zsh version (2) > zsh --version in my case it was: zsh 5.1.1 (x86_64-ubuntu-linux-gnu)

And now install oh-my-zsh: (3) > sh -c "$(curl -fsSL https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh)"

For example: postman

gksudo gedit /usr/share/applications/postman.desktop or sudo gedit /usr/share/applications/postman.desktop

**Note gksudo is used for graphical sudo

and put this in the file

Schema Example:

(1) swap

 swap area 
 4000 MB
 Note: that's it's realtive to your RAM Size if we have 8GB we should make it at least 8000MB.

Error on ubuntu 16.04 LTS

when open .mkv videos it says "dvd subpicture decoder package is not found"

Solution:

 sudo apt install libdvdnav4 libdvdread4 gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly libdvd-pkg

sudo apt install ubuntu-restricted-extras

Install php7.2 for ubuntu 16.04

sudo apt update && sudo apt upgrade

sudo apt-get install software-properties-common python-software-properties

sudo add-apt-repository -y ppa:ondrej/php

Create React App on Ubuntu 16.04

Install nodejs

sudo apt install nodejs

Install latest version of node

firstly, install npm sudo apt install npm

Error: ENOSPC: System limit for number of file watchers reached, watch

Increasing the amount of inotify watchers

You can set a new limit temporary with:

sudo sysctl fs.inotify.max_user_watches=524288
sudo sysctl -p

	It's very easy, here's how to install it on Ubuntu in 8 steps:

	1- go to [Julia downloads page][1]

	2- Choose you version (32bit or 64bit) from Generic Linux Binaries, and then download it.

	3- extract .tar.gz file in home or any place you would like to install Julia on it.

	4- run > `gksudo gedit /etc/environment` on your terminal to setup envirnment path.

	To show all your shells, you can run:
	$ cat /etc/shells

	and to choose one of them
	simpliy run it directory on terminal

	ex:$ /bin/bash

	for more info we can check: https://bash.cyberciti.biz/guide//etc/shells