/usr/share/gEDA/sym/74/74154-2.sym is in geda-symbols 1:1.6.2-4.3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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device=74154
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footprint=DIP24
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refdes=U?
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description=4-bit binary decoder/demultiplexer
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net=Vcc:24
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74154
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documentation=http://www.semiconductors.philips.com/acrobat/datasheets/74HC_HCT154_CNV_2.pdf
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