Linux/Basic commands/rsync

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rsync[1] is an advanced copy and synchronization tool including progress indicator.

Configuration files[edit]

  • /etc/rsyncd.conf which includes don't compress options for some file extensions

Options[edit]

-W, --whole-file
-z, --compress compresses the file data as it is sent to the destination machine using zlib compression library

Basic commands[edit]

  • Copy files from remote server to local machine: rsync -chavzP --stats user@remote.host:/path/to/copy /path/to/local/storage[2] (explainshell[3])
-c, --checksum option can slow transfers specially for large files
-h, --human-readable
-a, --archive. Equivalent to -rlptgoD
-v, --verbose
-z, --compress
-P, --partial --progress. --partial keep partially transferred files
--stats, print statistics
-a, --archive. Equivalent to -rlptgoD
-r --recursive recurse into directoriees
-l --links copy symlinks as symlinks
-p --perms preserve permissions
-t --times preserve modification times
-g --group preserve group
-o --owner preserve owner (super-user only)
-D same as --devices --specials


rsync -chavzP --stats user@remote.host:/path/to/copy /path/to/local/storage
receiving incremental file list
.../...


  • rsync -a -v --ignore-existing src dst

Compression[edit]

rsync support compression, but you can also compress your data with other external compression tools before using rsync. Such as bzip, gzip or xz


Compressing using xz[4]

  • xz -v -T0 file_to_compress
-v provides progress bar
-T0 use all available Threads, multi-threaded compression supported since 2014, version 5.2.0. [5]

Activities[edit]

  1. Create a remote copy of your files for backup proposes using rsync
  2. Read StackOverflow questions about rsync: https://stackoverflow.com/questions/tagged/rsync?tab=Votes
  3. Understand the differences between cp, scp and rsync: https://stackoverflow.com/questions/20244585/how-does-scp-differ-from-rsync
  4. Learn Effect of Trailing Slash / in rsync: https://www.alibabacloud.com/blog/speeding-up-network-file-transfers-with-rsync_594337
  5. Learn use of --inplace for transferring large files and its important implications: http://man7.org/linux/man-pages/man1/rsync.1.html, also evaluate -c, --checksum impact on transfering large files
  6. Learn about -W, --whole-file copy files whole (without delta-xfer algorithm), implications and usage cases such as not making a diff copy.
  7. Learn about --sparse option and conflicts with --inplace

See also[edit]

  • http://man7.org/linux/man-pages/man1/rsync.1.html
  • https://stackoverflow.com/questions/9090817/copying-files-using-rsync-from-remote-server-to-local-machine
  • https://explainshell.com/explain?cmd=rsync+-chavzP+--stats+user%40remote.host%3A%2Fpath%2Fto%2Fcopy+%2Fpath%2Fto%2Flocal%2Fstorage
  • https://linux.die.net/man/1/xz
  • https://git.tukaani.org/?p=xz.git;a=blob;f=NEWS;hb=HEAD