fix

Fix the problem that the file download speed is too slow (now up to full speed)
Fix the problem of multiple files at the same time (use the downloads command to view the progress)
Fix the problem that the /tmp/ directory file permissions on the low-version kernel system do not have the execute permission by default, which causes the beacon to fail to start
Fix the problem that resources are occupied and cause failure when beacon is repeatedly online on a low-version kernel system
Fix the problem that files landing on low-version kernel systems face name conflicts and fail to run

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