root@clusterserver3 ~]# docker pull centos
Using default tag: latest
Trying to pull repository docker.io/library/centos …
Pulling repository docker.io/library/centos
Error while pulling image: Get https://index.docker.io/v1/repositories/library/centos/images: x509: certificate has expired or is not yet valid
[root@clusterserver3 ~]# update-ca-trust extract
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