The phrase download nessusupdateplugins all20targz top usually stems from a misremembered command, a typo in a terminal script, or a corrupted output from a Linux top process monitoring tool. Breaking Down the Components
Do not rush to download the file yet. Verify the following:
if md5sum -c /opt/nessus/var/nessus/plugins/checksum.md5; then echo "Checksum OK. Updating..." /opt/nessus/sbin/nessuscli update "$OUTPUT_FILE" else echo "Checksum FAILED. Aborting." exit 1 fi