How to only copy files to a remote folder on another server that don’t already exist in the folder… from the command line in linux

file-copyremotesynchronization

I have two folders on two different servers.

I want to sync files between A and B, however, I only want to copy files that don't already exist in folder B because these files are huge. I don't care about updating files. I simply wants a copy of each in folder B.

How do I do this on Linux? (I suppose it'd be nice to know how to update files that have changed too)

Best Answer

rsync is able to do this.

rsync --ignore-existing <src> <dest>

You can perform also various kinds of updates. Just have a look at the man page.

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Shell – How to add/replace only modified/updated files recursively for some 2 folders

Rsync is your newest best friend.

rsync -av original/folder/ new/folder/

The trailing slashes are important on both; if you exclude the first, it will copy that folder as it's own folder into new/folder/. It's best to use the -a flag to preserve permissions, timestamps, etc.

Rsync will also automatically create directories as necessary to duplicate the structure.

Ssh – How to copy files from one machine to another using ssh

Syntax:

scp <source> <destination>

To copy a file from B to A while logged into B:

scp /path/to/file username@a:/path/to/destination

To copy a file from B to A while logged into A:

scp username@b:/path/to/file /path/to/destination

Best Answer

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