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libxml2/libxslt (required only if you are using ldap)
# Debian based systems sudo apt-get install libxml2-dev libxslt1-dev # RedHat based systems sudo yum install libxml2-devel libxslt-devel
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Pip (python package manger), if missing, install with below command (cross platform)
curl -O https://bootstrap.pypa.io/get-pip.py; sudo python get-pip.py