Symptoms

Migration failed with the following error:

Failed to fetch basic information about resellers, clients and domains data from source servers
Cause: Command execution failed on the source server 'source' (180.222.186.138) with non-zero exit code.
command: cat /tmp/version
exit code: 1
stdout: ***hidden***
stderr: ***hidden***
That is a critical error, migration was stopped.

Migration was started from a non-root user on the source server.

Unable to open /tmp/version file on the source server:

Permission denied

Cause

Not enough permissions for running migration under a non-root user

Resolution

Either start migration from a root user, or grant root's permissions to a user that is used for migration from the source server.

See Migration Guide for more details.