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Asked: 2018-03-08 22:36:23 +0800 CST

How can I rsync to all remote connected host?

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I'm using following command to transfer file using rsync to only one connected host:

rsync -az -e ssh /path/to/source 192.168.8.8:/path/to/destination

This is the case of static ip addesss. But in other case there are more than one system connected using DHCP.

I've tried:

rsync -az -e ssh /path/to/source 192.168.8.*:/path/to/destination

But it shows an error

ssh: could not resolve the hostname 192.168.8.*: Name or service not known
ssh rsync

2 Answers

  1. Wildcards and the simple regex (e.g. ls /usr/bin/x[bc]*) only work on the local filesystem.

    Wildcards cannot know, which remote host you want copy the folders to. You need a loop for that:

    for i in $(seq 8 18); do; \
   rsync -az -e ssh /path/to/source 192.168.8.$i:/path/to/destination; \
done

    This will copy the source to all host from 192.168.8.8 to 192.168.8.18.

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  2. rsync can only copy to one destination at a time, like ssh can only connect to one destination per invocation.

    However, you may want to have a look at the package pssh (for Parallel SSH), which also provides parallel rsync:

    - Parallel rsync (parallel-rsync, upstream calls it prsync), efficiently
  copies files to multiple hosts in parallel
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