The documentation states that the license manager 2018.1 requires SUSE Linux Enteprise Server 11 SP4 (and future upates and service packs).
ArcGIS License Manager system requirements—License Manager Guide | ArcGIS Desktop
Critical third party components by Flexera do not support these Operating Systems. It may be that the other Linux OS will work, but these are not tested or supported by Esri and are used at users own risk.
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