Sophie: lib64netpbm10-10.34-4.1mdv2007.1 x86

lib64netpbm10-10.34-4.1mdv2007.1.x86_64.rpm

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Are you looking for the man pages?

Netpbm does not have man pages in the conventional Unix form.  Please see 
the file doc/USERDOC for a complete explanation of this.