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set -e
[ $# -eq 0 ] && { echo "Usage: sudo $0 \$(/usr/libexec/java_home -v '1.8*')" ; exit 1; }
# to be idempotent
keytool -delete -alias isrgrootx1 -keystore $KEYSTORE -storepass changeit 2> /dev/null || true
keytool -delete -alias isrgrootx2 -keystore $KEYSTORE -storepass changeit 2> /dev/null || true
keytool -delete -alias letsencryptauthorityx1 -keystore $KEYSTORE -storepass changeit 2> /dev/null || true
keytool -delete -alias letsencryptauthorityx2 -keystore $KEYSTORE -storepass changeit 2> /dev/null || true
keytool -delete -alias letsencryptauthorityx3 -keystore $KEYSTORE -storepass changeit 2> /dev/null || true
keytool -delete -alias letsencryptauthorityx4 -keystore $KEYSTORE -storepass changeit 2> /dev/null || true
keytool -trustcacerts -keystore $KEYSTORE -storepass changeit -noprompt -importcert -alias isrgrootx1 -file letsencryptauthorityx1.der
keytool -trustcacerts -keystore $KEYSTORE -storepass changeit -noprompt -importcert -alias isrgrootx2 -file letsencryptauthorityx2.der
keytool -trustcacerts -keystore $KEYSTORE -storepass changeit -noprompt -importcert -alias letsencryptauthorityx1 -file lets-encrypt-x1-cross-signed.der
keytool -trustcacerts -keystore $KEYSTORE -storepass changeit -noprompt -importcert -alias letsencryptauthorityx2 -file lets-encrypt-x2-cross-signed.der
keytool -trustcacerts -keystore $KEYSTORE -storepass changeit -noprompt -importcert -alias letsencryptauthorityx3 -file lets-encrypt-x3-cross-signed.der
keytool -trustcacerts -keystore $KEYSTORE -storepass changeit -noprompt -importcert -alias letsencryptauthorityx4 -file lets-encrypt-x4-cross-signed.der
rm -f letsencryptauthorityx1.der letsencryptauthorityx2.der lets-encrypt-x1-cross-signed.der lets-encrypt-x2-cross-signed.der lets-encrypt-x3-cross-signed.der lets-encrypt-x4-cross-signed.der
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You must restart the server after running the sh?

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@JuniorBatista yes you will have to restart any java processes that need to use the new certs

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EHJ-52n commented Mar 15, 2017

@Firefishy I have an version for jenkins users:

The keytool version I have requires to change the option -importcert to -import.

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@EHJ-52n maybe this helps you

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Sicaine commented Sep 21, 2018

If you are using debian, you can use the following package:, link the trust store of your jvm to that one and use the update-ca-certificates tool to integrate custome certificates.

But there is a big chance, that after using the ca-certificates-java, you don't need to add those certificates manually anyway.

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