Please try following command on Amazon Linux.

$ sudo su -
# yum update -y
# pip install --upgrade pip
# hash -r
# yum install gcc openssl-devel python-devel  openldap-devel -y
# pip install ajenti
# wget http://repo.ajenti.org/ajenti-repo-1.0-1.noarch.rpm 
# rpm -i ajenti-repo-1.0-1.noarch.rpm
# yum install ajenti -y
# service ajenti restart