Linux: Sync Across Machines, rsync
rsync is a command line util that lets you do one-way copying/updating from one machine to another.
The remote machine must also have rsync installed. (it's installed by default in linux)
rsync -z -a -v -t --rsh="ssh -l jane" ~/web/ email@example.com:~/
This will copy the local dir
~/web/ to the remote dir
~/ on the machine with domain name “example.org”, using login “jane” thru the ssh protocol.
-a→ archived mode, basically making the file's meta data (owner/perm/timestamp) same as the local file (when possible) and do recursive (i.e. Upload the whole dir).
-z→ use compression for transmission. (compress files first, transmit, uncompress. This saves bandwidth.)
-v→ verbose mode. Print out which files is being updated.
-t→ copy timestamp from source to destination. If you don't, rsync will basically update every file. Timestamp is used by rsync to check if file's been updated.
For example, here's what i use to sync/upload my website on my local machine to my server.
rsync -z -a -v -t --exclude="*~" --exclude=".DS_Store" --exclude=".bash_history" --exclude="*/_curves_robert_yates/*.png" --exclude="logs/*" --exclude="xlogs/*" --delete --rsh="ssh -l jane" ~/web/ firstname.lastname@example.org:~/
--exclude=glob_pattern→ ignore file names that matches glob_pattern in source directory. (i.e. if it matches, don't upload it, nor delete it on remote server) For example,
*.javacmeans all files ending in
--delete→ if a file/dir in destination is not in source directory, delete it.
Here's a example of syncing Windows and Mac.
rsync -z -r -v --delete --rsh="ssh -l xah" ~/web/ email@example.com:~/web/
-r is used instead of
-r means recursive, all sub directories and files. Don't use
-a because that will sync file owner, group, permissions, and others, but because Windows and unix have different permission systems and file systems, so
-a is usually not what you want.
Here's a example of reverse direction.
rsync -z -a -v -t --rsh="ssh -l jane" firstname.lastname@example.org:~/web/ ~/
This will get everything from the remote machine, to local machine.