Linux migration guides

Each guide covers one move people ask us about: what the target renames, removes or configures differently, what you have to decide before the rebuild, and what vrtmv's own parity run of that move showed.

If yours is not here, ask: we scope exact sources and targets with you.

• Migrate CentOS 7 to AlmaLinux 9. The most common CentOS exit, two major releases in one move.
• Migrate CentOS 7 to Rocky Linux 9. Two major releases, with the config settings EL9 no longer accepts.
• Migrate CentOS 7 to RHEL 9. For estates that want Red Hat support at the end of the move.
• Migrate CentOS 8 to AlmaLinux 9. One major release up, from a CentOS that ended years early.
• Migrate CentOS 8 to Rocky Linux 9. From an abandoned CentOS straight to the current Rocky release.
• Move RHEL 7 to RHEL 9 in one step. Two Leapp upgrades replaced by one planned rebuild.
• Move Ubuntu 20.04 to Ubuntu 24.04 in one step. Two LTS releases in one move, with the database jumps planned.
• Migrate CentOS 7 to AlmaLinux 8. One major release up, for applications certified on EL8.
• Migrate CentOS 7 to Rocky Linux 8. The one-release step from CentOS 7 to Rocky Linux.
• Migrate CentOS 7 to Ubuntu 24.04. Leaving the Red Hat family: every package and unit name rechecked.
• Migrate RHEL 7 to AlmaLinux 9. Out of RHEL 7 and its paid extended support, to a free RHEL 9 rebuild.
• Move Ubuntu 18.04 to Ubuntu 24.04 in one step. Three LTS releases skipped in one planned rebuild.