====== To get the actual zwoggel-ca master certificate use e.g. ====== wget -q https://zwoggel.net/ca.zwoggel.net.crt = To install it in linux system wide= copy it to /etc/ssl/certs/ and trigger the certificate update process. With debian: update-ca-certificates But for debian you could also use the method described in ZwoggelDebian. ====== To make a java jre trust zwoggel use ====== sudo keytool -import -trustcacerts -alias zwoggel.net -file /ca.zwoggel.net.crt -keystore lib/security/certs using default password "changeit" in the jre's home directory.