Synchronize two remote directories

[Jean Daniel Browne]

rsync -az -e ssh --delete /var/data/ remote:/var/data
Watch the trailing /. Only the difference is copied: it save lots of transfer when the directories are almost similar.

The french translation:
Attention au /. Seules les différences sont copiées: si les répertoires sont presque identique, c'est très rapide.

[Nick Barcet (nijaba)]

Needs a rewrite so that it will fit on 2 lines per https://wiki.ubuntu.com/server-tips and so that it is explained what the command does.

[Jean Daniel Browne (jeandaniel.browne)]

Synchronize directories: rsync -az -e ssh --delete /var/data/ remote:/var/data
"Delta-transfer": bandwidth saved when the directories are almost similar.

The french translation:

Synchronisation de répertoire: rsync -az -e ssh --delete var/ remote:var
Transfert "incrémental": très rapide si les répertoires sont presque identique.