1 iptables -t filter -A INPUT -j LOG --log-prefix foo
2 iptables -t filter -A INPUT -j LOG --log-prefix foo
3 iptables -t filter -A INPUT -j LOG --log-prefix $A
4 iptables -t filter -A INPUT -j LOG --log-prefix foo
5 iptables -t filter -A INPUT -j LOG --log-prefix 'pre foo post'
6 iptables -t filter -A INPUT -j LOG --log-prefix 'another $A one'
7 iptables -t filter -A INPUT -j LOG --log-prefix 'foo double $A'
8 iptables -t filter -A INPUT -j LOG --log-prefix foo:abc:bar