Why rsync command throws 'rsync error: protocol incompatibility (code 2) at compat.c' message ?

Solution Verified - Updated -

Issue

  • Why rsync is giving protocol error message during file copying ?
# rsync -avz -e ssh hostname:/export

protocol version mismatch -- is your shell clean?
(see the rsync man page for an explanation)
rsync error: protocol incompatibility (code 2) at compat.c(171) [receiver=3.0.6]

Environment

  • Red Hat Enterprise Linux 5.6
  • rsync

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