Connections one-liner

[frater]

UserParameter=net.connections, conntrack -C 2>/dev/null || sudo grep -c . /proc/net/ip_conntrack

interval = 30 or 60 seconds
applications = network, performance

echo "zabbix ALL =(ALL) NOPASSWD: `which grep`" >>/etc/sudoers

If conntrack-tools is installed it will return the value of conntrack -C, if it isn't it will count the lines in /proc/net/ip_conntrack with grep.

If you have more than 5000 connections you should really install conntrack-tools (apt-get install conntrack) as it's much faster.

Previously I did this with my generic function regcount, but it's worthwhile to make a special function for it.