stream extract of cpio archive

extract cpio archive, split into parts.

create archive with split command, reassemble into stream with cat of all of parts in order.

example

cat usr-cpio-* | cpio -idv

cat usr-cpio-* assembles all parts into a stream

use pipe to cpio  | cpio

cpio options -idv 

-i means cpio put into reading mode, w/o other input option, will default to stdin
  stdin driven by cat command pipped to the cpio invocation.

-d  create directories, and recurse.

-v  verbose report to stdout (stdout for a -i instance is either silent, or verbose list of files

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find / cpio directory copy / move / archive info

http://bradthemad.org/tech/notes/cpio_directory.php

https://www.computerhope.com/unix/ucpio.htm

Create a cpio archive:

localhost% find path/ -depth -print | cpio -oaV > archive.cpio
localhost% find path/ -depth -print | cpio -oaV -O archive.cpio

Create a cpio archive and compress it:

localhost% find path/ -depth -print | cpio -oaV | gzip -c > archive.cpio.gz

Extract a compressed cpio archive:

cd to parent directory of location to install.

gzip -cd path-to-cpio-gz | cpio -idmv

<uncompress to stdout>  pipe <cpio install stream from stdin>

http://superuser.com/questions/31078/cpio-basic-extract-command-tar-xzvf-equivalent 

Extract a cpio archive:

localhost% cpio -imVd < archive.cpio
localhost% cpio -imVd -I archive.cpio

List the contents of a cpio archive:

localhost% cpio -it < archive.cpio
localhost% cpio -it -I archive.cpio

Use cpio copy-pass to copy a directory structure to another location:

localhost% find path/ -depth -print | cpio -pamVd /new/parent/dir

cpio over ssh

To cpio a local directory, send the output to ssh and feed it to cpio on a remote host:

localhost% find path/ -depth -print | cpio -oaV | ssh user@host 'cpio -imVd'

Ssh to a remote host, cpio a remote directory, and get its output locally:

localhost% ssh user@host "find path/ -depth -print | cpio -oaV" | cpio -imVd 

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Another reference

https://docs.oracle.com/cd/E23824_01/html/821-1459/bkupsavefiles-21.html

1. Change to the appropriate directory.

   # cd filesystem1

2. Copy the directory tree from filesystem1 to filesystem2 by using a combination of the find and cpio commands.

   # find . -print -depth | cpio -pdm filesystem2

   .

   Starts in the current working directory.

   -print

   Prints the file names.

   -depth

   Descends the directory hierarchy and prints file names from the bottom up.

   -p

   Creates a list of files.

   -d

   Creates directories as needed.

   -m

   Sets the correct modification times on directories.

   For more information, see cpio(1).
   The files from the directory name you specify are copied. The symbolic links are preserved.
   You might also specify the -u option. This option forces an unconditional copy. Otherwise, older files do not replace newer files. This option might be useful if you want an exact copy of a directory, and some of the files being copied might already exist in the target directory.

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