command module
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Published: Sep 8, 2021 License: MIT Imports: 1 Imported by: 0



Nikos is a simple tool for downloading Kernel headers for multiple Linux distributions. It can be used both as a CLI application and a library.


  • Debian
  • Ubuntu
  • RHEL
  • CentOS
  • Fedora
  • OpenSUSE Leap
  • SLES
  • Google Container Optimized OS
  • WSL2


On a host

$ nikos download --output /tmp

Inside a container

You need to bind mount a few folders from the host:

  • Ubuntu / Debian /etc/apt (if you used a different path, you can use the --apt-config-dir flag)

  • RHEL / CentOS / Fedora

    • /etc/yum.repos.d (if you used a different path, you can use the --yum-repos-dir flag)
    • /etc/pki
    • /etc/rhsm (for RHEL with an active subscription)
  • OpenSUSE

    • /etc/zypp (if you used a different path, you can use the --yum-repos-dir flag)



Both APT and Container Optimized OS use pure Golang implementationns.

To support RPM based distributions, you need libdnf. On Fedora, simply use dnf install libdnf-devel. To target machines that do not have libdnf, an omnibus project is available here.


$ go build -tags dnf

If you used the omnibus method described above, you should use:

$ PKG_CONFIG_PATH=/opt/nikos/embedded/lib/pkgconfig CGO_LDFLAGS="-Wl,-rpath,/opt/nikos/embedded/lib" go build -tags dnf


Tests are using the Molecule framework.

To run the tests, you can either:

  • Compile the Nikos dependencies using omnibus as described in Requirements.
  • Download a precompiled version of it here. You then need to decompress it in your local Nikos repository folder.

To run the tests for Debian, simply run in the tests folder:

$ molecule test -s debian

You can also run the tests for centos, debian, opensuse and ubuntu.


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