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Bug #20925
closedkatello-change-hostname should check exit codes of shell executions
Description
currently, k-c-h does a lot `something in shell`, but never verifies the exit code and thus does not know if the execution actually succeeded.
I think it should verify that every execution returned 0 and abort the rename if that is not the case. ideally, the abort is coupled with a rollback, if that is feasible.
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