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I want to make /lib/modules compress copy and move to /opt directory. using cpio

I try this

 cpio /lib/modules > directory.cpio | mv directory.cpio /opt
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    any particular reason you want to use age old cpio ? (besides cpio is not a compress tool)
    – Archemar
    Jan 4, 2019 at 13:51
  • cd /lib/modules | ls | cpio -ov > directory.cpio like this
    – Top Music
    Jan 4, 2019 at 13:56
  • why not cd /lib/modules ; ls | cpio -ov > /opt/directory.cpio then ? (note the ; after cd)
    – Archemar
    Jan 4, 2019 at 13:58
  • this ? find /lib/modules > iraklsssi.cpio | cp iraklsssi.cpio /opt
    – Top Music
    Jan 4, 2019 at 14:06
  • ; is used to separate commands, while |is used to pipe previous command's output to next's input, it can also separate command, but if they produce not output, execution will halt.
    – Archemar
    Jan 4, 2019 at 14:10

1 Answer 1

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Create a compressed cpio archive using file to locate the input files

Backup up some files:

find *.txt -depth|cpio -oc|gzip -q -9 -c >/tmp/a.gz

List the contents:

gzip -d a.gz -c|cpio -it

Extract the contents:

gzip -d /tmp/a.gz -c|cpio -imVd

I grew up creating backups and software distributions on 8" mag tapes to be sent by courier around the world. I still have great love for cpio and find, but my memory is significantly jaded. I'd have used compress/uncompress, but I did not find these in the RHEL7 that I use in the office. Zcat works just as well, because these are pretty much the same thing nowadays.

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