Rsync for NAS beginner

rsync.md

Rsync for NAS beginner

Local backup

rsync -ahvP [-c] [-m] [-W] [-n] [--remove-source-files] [--log-file=FILE] src dest

use sudo to keep file ownership!

recommended options

• -a : archive mode; equals -rlptgoD (no -H,-A,-X)
• -h : output numbers in a human-readable format
• -v : increase verbosity
• -P : same as --partial --progress
  • --partial : keep partially transferred files
  • --progress : show progress during transfer

use by your decision

• -c : skip based on checksum, not mod-time & size
• -m : prune empty directory chains from file-list
• -W : copy files whole (w/o delta-xfer algorithm)
• -n : perform a trial run with no changes made (dry-run)
• --remove-source-files : sender removes synchronized files (non-dir)
• --log-file=FILE : log what we're doing to the specified FILE

archive mode (-a)

archive mode handles recursion, file ownership, permission and so on...

• -r : recurse into directories
• -l : copy symlinks as symlinks
• -p : preserve permissions
• -t : preserve modification times
• -g : preserve group
• -o : preserve owner (super-user only)
• -D : same as --devices --specials
  • --devices : preserve device files (super-user only)
  • --specials : preserve special files

archive mode does not handles

• -H : preserve hard links
• -A : preserve ACLs (implies -p)
• -X : preserve extended attributes

additional command

find . -depth -type d -empty -delete

prunes empty subdirectories (useful with --remove-source-files)