Setting up Jenkins slave on Digital Ocean

setup_jenkins.sh

fallocate -l 4G /swapfile
chmod -v 600 /swapfile
mkswap /swapfile
echo '/swapfile none swap sw 0 0' >> /etc/fstab
swapon -a
free

groupadd -g 900 jenkins
useradd -m -u 900 -g 900 -G docker jenkins

sudo -u jenkins -i mkdir -v -m 700 .ssh
sudo -u jenkins -i tee .ssh/authorized_keys < .ssh/authorized_keys
sudo -u jenkins -i chmod -v 600 .ssh/authorized_keys

curl -L -C - -b "oraclelicense=accept-securebackup-cookie" -O http://download.oracle.com/otn-pub/java/jdk/8u5-b13/jdk-8u5-linux-x64.tar.gz
tar zxf jdk-*.tar.gz
rm -v jdk-*.tar.gz
mv -v jdk* /usr/local/java