How to recover a lost root password on zLinux systems (s390x/TN3270)
Issue
- How to recover a lost root password on an s390x system?
- How to recover a lost root password on an TN3270 system?
- How to interact with the ZIPL boot loader in order to recover a root password?
- How to recover a root password on a Red Hat zLinux system?
- How to recover a root password on an IBM zSystem?
Environment
- RHEL 7 zLinux on s390x
- RHEL 7.5 Structure A on s360x
- RHEL 7.6 zLinux on TN3270
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