The -s option prints out a simple inventory.
-sh-2.05b$ wgrib2 new.grb2 -s
2:125535:d=2007032600:HGT:1000 mb:3 hour fcst:
The -s option is coded like a macro, the option
call other options like -t, -var, -lev, -ftime, and -misc. The last option,
-misc, changes with time. For example, when chemical tracers were added, -misc
was expanded to print out the characteristics of the tracers.
The output of the options, including -s, can be saved by the -inv option.