Ubuntu Usful command lines

ubuntu utils.sh

# generate private and public keys
ssh-keygen -f ~/.ssh/id_rsa -q -P ""
cat ~/.ssh/id_rsa.pub

# add some public keys
nano ~/.ssh/authorized_keys

## install basic packages
sudo apt-get -y update
sudo apt-get -y install default-jre git ImageMagick

#create swap file (6GB)
sudo fallocate -l 6G /swapfile
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile
sudo echo '/swapfile none swap defaults 0 0' >> /etc/fstab

# install mongodb-org package
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 7F0CEB10
sudo echo "deb http://repo.mongodb.org/apt/ubuntu "$(lsb_release -sc)"/mongodb-org/3.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.0.list
sudo apt-get -y update
sudo apt-get -y install mongodb-org

#install node.js & npm
sudo apt-get -y install nodejs npm
sudo npm install -g n mocha
sudo n stable