PREUN

/bin/sh

if [ $1 -eq 0 ] ; then 
        # Package removal, not upgrade 
        systemctl --no-reload disable nginx.service > /dev/null 2>&1 || : 
        systemctl stop nginx.service > /dev/null 2>&1 || : 
fi

POSTIN

/bin/sh

if [ $1 -eq 1 ] ; then 
        # Initial installation 
        systemctl preset nginx.service >/dev/null 2>&1 || : 
fi 
if [ $1 -eq 2 ]; then
    # Make sure these directories are not world readable.
    chmod 700 /var/lib/nginx
    chmod 700 /var/lib/nginx/tmp
    chmod 700 /var/log/nginx
fi

POSTUN

/bin/sh

systemctl daemon-reload >/dev/null 2>&1 || :