commands or built-ins?  on this distribution?

dmesg bootloader ldd ldconfig dpkg dpkg-reconfigure apt-get apt-cache aptitude 
rpm rpm2cpio yum yumdownloader bash echo env exec export pwd set unset man uname 
history cat cut expand fmt head od join nl paste pr sed sort split tail tr unexpand 
uniq wc cp find mkdir mv ls rm rmdir touch tar cpio dd file gzip gunzip bzip2 tee 
xargs bg fg jobs kill nohup ps top free uptime killall nice ps renice top grep egrep 
fgrep sed regex vi fdisk mkfs mkswap du df fsck e2fsck mke2fs debugfs dumpe2fs tune2fs 
mount umount quota edquota repquota quotaon chmod umask chown chgrp find locate updatedb 
whereis which type 


1) determine if a command?
	- which?
	- find?

2) if on system, create man..txt file

3) if a built-in, extract details from man page on shell.

4) can you make this into a script?