Explain below mention command we are not passing username as well password still we can do rsync.
rsync -avz rsync.apache.org::apache-dist /path/to/mirror
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rsync.apache.org::apache-dist provides a public
rsync server. There is no need to authenticate with username or password to download things from it.
If possible, choose an Apache mirror that is close to you. A list of official (full) mirror servers are available at https://www.apache.org/mirrors/dist.html (see the "type" column for which ones supports