How to fix issue when Munin doesn’t zoom/show graphs by day

For nginx:

sudo apt-get install spawn-fcgi libcgi-fast-perl libapache2-mod-fcgid
sudo spawn-fcgi -s /var/run/munin/fcgi-graph.sock -U www-data -u www-data -g www-data /usr/lib/munin/cgi/munin-cgi-graph

For Apache2:

sudo apt-get install libapache2-mod-fcgid
sudo a2enmod fcgid
sudo service apache2 restart
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