Duplicate a directory tree using tar and pipes

(cd /source/dir ; tar cv .)|(cd /dest/dir ; tar xv)
the f is for file and - stdout, This way little shorter. I Like copy-directory function It does the job but looks like SH**, and this doesn't understand folders with whitespaces and can only handle full path, but otherwise fine, function copy-directory () { ; FrDir="$(echo $1 | sed 's:/: :g' | awk '/ / {print $NF}')" ; SiZe="$(du -sb $1 | awk '{print $1}')" ; (cd $1 ; cd .. ; tar c $FrDir/ )|pv -s $SiZe|(cd $2 ; tar x ) ; }
Sample Output
copy-directory /media/cdrom /mnt/backup/
 104MB 0:00:06 [7.43MB/s] [============>                                                      ]  9% ETA 0:00:58

2 Alternatives + Submit Alt

What Others Think

how about a good old cp, since you're on the same machine? Also, I think you're missing the - from your tar commands because tar doesn't use stdin/stdout by default.
bwoodacre · 640 weeks ago
From man pages of tar. -f, --file [HOSTNAME:]F use archive file or device F (otherwise value of TAPE environment variable; if unset, "-", meaning stdin/stdout) And I use it mostly on large folder copies on a mounted network drive. i.e my copy-directory function
marssi · 640 weeks ago
tar cvpf - . | tar -C /where/you/want/the/copy xvpf -
unixmonkey4704 · 640 weeks ago
BITD you need -f - because the default was a tape drive device, not stdout :-) However, on a modern system, this doesn't beat cp -av (or if you want things like --exclude, rsync -av)
eichin · 640 weeks ago
You can also use find+cpio: cd /src; find . | cpio -dump /dst A nice variant is the -l option: It doesn't really copy the files, but creates a tree of hardlinks. Only works within the same file system, of course: cd /src; find . | cpio -dumpl /dst If some files contain white space characters, then you should use the -print0 option with find, and the -0 (zero) option with cpio. On BSD systems, the cpdup command is most convenient and very efficient: cpdup /src /dst By the way, the cp command (with -r or -R) should be avoided. It's not portable, the exact semantics are not well-defined. Notably it doesn't copy all kinds of files correctly, on some platforms it doesn't handle hardlinks, FIFOs or other special files correctly.
inof · 639 weeks and 6 days ago
The function is really overcomplicated. Rather than 'echo | sed | awk' you can use parameter expansion, ${1##*/} ... which will return the last item of the path. Also with the use 'sed |awk', awk understands fields, and you can tell what the FS is, so the above can abreviated to: awk -F/ '{print $NF}' ... though again your better off with parameter expansion.
khayyam · 446 weeks and 4 days ago

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