Thursday, November 18, 2021

[SOLVED] cp: -r not specified; omitting directory '/etc/udev/rules.d/70-persistent-net.rules' while installing a new kernel

Issue

While running a regular apt upgrade, apt shows me that there's a new kernel, but the installation fails with the following message:

Setting up linux-image-4.19.0-18-amd64 (4.19.208-1) ...
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-4.19.0-18-amd64
cp: -r not specified; omitting directory '/etc/udev/rules.d/70-persistent-net.rules'
E: /usr/share/initramfs-tools/hooks/udev failed with return 1.
update-initramfs: failed for /boot/initrd.img-4.19.0-18-amd64 with 1.
run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
dpkg: error processing package linux-image-4.19.0-18-amd64 (--configure):
 installed linux-image-4.19.0-18-amd64 package post-installation script subprocess returned error exit status 1
dpkg: dependency problems prevent configuration of linux-image-amd64:
 linux-image-amd64 depends on linux-image-4.19.0-18-amd64; however:
  Package linux-image-4.19.0-18-amd64 is not configured yet.

Errors were encountered while processing:
 linux-image-4.19.0-18-amd64
 linux-image-amd64
 initramfs-tools
E: Sub-process /usr/bin/dpkg returned an error code (1)

And it just won't generate a new initrd. None of apt install -f, dpkg-reconfigure linux-image-4.19.0-18-amd64, dpkg-reconfigure initramfs-tool work. I also downloaded those deb files but also to no avail. What should I go on?


Solution

The error message hinted that the error is located at /usr/share/initramfs-tools/hooks/udev.

Near the end of the script you can find something like

# now copy all custom udev rules which don't have an equivalent in /lib (e. g.
# 70-persistent-net.rules or similar); They might contain network names or
# other bits which are relevant for the initramfs.
for rules in /etc/udev/rules.d/*.rules; do
  if [ -e "$rules" ] && [ ! -e "/lib/${rules#/etc/}" ]; then
    cp -p "$rules" "$DESTDIR/lib/udev/rules.d/"
  fi
done

Add a -r option to cp like cp -rp "$rules" "$DESTDIR/lib/udev/rules.d/ and everything runs smoothly after apt install -f.



Answered By - dibery
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