/usr/lib/x86_64-linux-gnu/root5.34/libEG.rootmap is in libroot-montecarlo-eg5.34 5.34.30-0ubuntu8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 | Library.TAttParticle:                       libEG.so libGraf3d.so libGraf.so libGpad.so libMathCore.so
Library.TDatabasePDG:                       libEG.so libGraf3d.so libGraf.so libGpad.so libMathCore.so
Library.TDecayChannel:                      libEG.so libGraf3d.so libGraf.so libGpad.so libMathCore.so
Library.TGenerator:                         libEG.so libGraf3d.so libGraf.so libGpad.so libMathCore.so
Library.TParticle:                          libEG.so libGraf3d.so libGraf.so libGpad.so libMathCore.so
Library.TParticleClassPDG:                  libEG.so libGraf3d.so libGraf.so libGpad.so libMathCore.so
Library.TParticlePDG:                       libEG.so libGraf3d.so libGraf.so libGpad.so libMathCore.so
Library.TPrimary:                           libEG.so libGraf3d.so libGraf.so libGpad.so libMathCore.so
Library.TVirtualMCDecayer:                  libEG.so libGraf3d.so libGraf.so libGpad.so libMathCore.so
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