This one trick pony is ridden to the end of the road, usefully even if not portably: from a bash prompt.
(Okay, some have too many ';' in there to be one-liners strictly speaking - but they all express a linear thought, briefly enough to be easily remembered). The idea here isn't "golf", but UYKAKYU (Use yields knowledge as knowledge yields use)

I've climbed the learning curve this past month, far enough that I deserve to be thwacked for bad practices if you notice any you want to point out.
mkmcconn

Print @INC
perl -we 'print "$_\n" for @INC;'
 
Print filenames in @INC to pipe
perl -we 'push @a, <$_/*> for @INC; print "$_\n" for @a;' | more
 
Search for "PerlMonks" in filenames of @INC excluding PWD
perl -we '/^\./ or push @a, glob "$_/*" for @INC; print "$_\n" for @a;' | grep "PerlMonks"
 
Grep for the lwp cookbook, perlishly
perl -we '/^\./ or push @a, <$_/*> for @INC; print "$_\n" for grep {/lwp.+(pod)/} @a;'
 
Page through all ".pm" files related to "(F|f)ile.." in @INC outside PWD, bash-fully
less $(perl -we '/^\./ or push @a, <$_/*> for @INC; print "$_\n" for grep{/\bFile.*\.pm/i} @a;')
 
Make a two-line (code-once-use-again) bash-ful aliased regexified search of leaves-only for "perl.."-stuff in @INC outside of $PWD
% function grep4inc { perl -we '/^\./ or push @a, <$_/*> for @INC; print "$_\n" for grep {/$ARGV[0]/i} @a;' $1;}
% grep4inc "\Wperl.[^\/]+$";
 
Modify all the above to use the -l switch (thanks chipmunk).
 
Or do any of the above eliminating the need of @a.
perl -wle 'for (@INC){ for (glob "$_/*"){ !/^\./ and print if /$ARGV[0]/;} }' "Stor"
 
for I in $(perl -wle'for (@INC){ for (glob "$_/*"){ next if /^\./; print if /$ARGV[0]/i;}}' "lwp") ; do perldoc $I; done
 

In reply to one-liner peeks at @INC by mkmcconn

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