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thinksinbinary
Asked: 2015-09-26 18:13:52 +0800 CST

Why won't my cp command copy whole directories? [duplicate]

  • 772

I've tested the cp command, and it will only copy individual files. For example, I typed cp followed by the exact filename, then typed the directory and the file got copied. However, when I typed the directory and the destination directory, nothing on the computer changed. I thought cp was supposed to copy contents in the directories.

I've tried this multiple times.

command-line

3 Answers

  1. Best Answer

    When you use cp without any arguments, it defaults to copying files as below

     cp sourcefile destinationLocation
 #will copy sourcefile to the specified destinationLocation

    But if you want to copy a directory, you need to specify the recursive argument like this

    cp -R dir1 dir2 #copies dir1 to dir2
cp -R dir dir2 dir3 #copies dir1 & dir2 to dir3

    Ideally you can specify as many files as you want to a single destination all separated by spaces. This here below however copies a dir along with its permissions

     sudo cp -rp /home/me /media/backup/me
 -p     same as --preserve=mode,ownership,timestamps

    Alternatively you can use rsync

     sudo rsync -a /home/me/ /media/backup/me/
 -a, --archive

          Note that -a does not preserve hardlinks, because finding  multiply-linked
          files is expensive.  You must separately specify -H.

    And Please don't forget the trailing slashes when copying using rsync. See the man page for each command on options of using them available on your terminal by typing man cp or man rsync

    • 16

  2. Use 

    cp -R

    It specifies recursive copy i.e. all sub-directories and files will be copied. Use man cp to find more switches for cp.

    • 5

  3. cp does not, by default, copy directories. From man 1posix cp:

    2. If source_file is of type directory, the following steps  shall  be
   taken:

    a. If  neither the -R or -r options were specified, cp shall write
       a diagnostic message to standard error, do  nothing  more  with
       source_file, and go on to any remaining files.

    You should have got a message like so:

    cp: omitting directory '...'

    For example:

    $ cp Documents Pictures
cp: omitting directory ‘Documents’

    As can be seen from the manpage, use -r or -R with cp:

    cp -R Documents Pictures
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