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In the past our applications were provided in the form of a compressed tar file, which required some manual steps for unpacking and installer invocation. As of February 2016 we've switched to a self-extracting download format which make makes this aspect much more user-friendly.
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As pointed out above, the installer needs do to extract the product files into a temporary directory and then restart using install the extracted programsfiles.
This fails if the standard temp directory /tmp is mounted with the noexec mount flag.
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