AlmaLinux OS
AlmaLinux OS is an open-source, community-driven project that is built from the source code of Red Hat Enterprise Linux (RHEL). AlmaLinux is a completely binary compatible fork of RHEL and it is maintained by AlmaLinux OS Foundation which is a register non-profit.
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ALT Linux
ALT Linux was founded in 2001 by a merge of two large Russian free software projects. By the year 2008 it became a large organization developing and deploying free software, writing documentation and technical literature, supporting users, and developing custom products.