History and locate commands not working

If you are using csh,  then use

set history=100

history

That is a help but why will locate not function from root.  Specifically it will not take the locate -u to update the db.

here is what i see when I enter locate:
ksh: locate:  not found

This indicates that either locate is not available on your system, or it's parent dir is not in PATH.

To find if locate is available on your system, run

which locate

OR

whereis locate

OR

Find / -name locate

/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/etc:/usr/bin/X11://opt/informix/bin:/opt/informix:/usr/byrams:/usr/byrams/source:/usr/lib:/usr/fourgen:/usr/fourgen/bin:/usr/local/samba/bin:/usr/byrams/sh:/usr/byrams/perl:.

Never mind "locate" is not on the system.  I still can only see 10 lines of the history.  I would like this to be infinate as most are in lunux.

Did you try from csh

set history=100

What do you get?

Any chance to use ksh or bash instead of csh?

For ksh you may include set -o vi in your .profile and you can edit previous commands with vi like commands, while in bash you may use command history immediately.

Both ksh and bash store previous commands and can use commands across logins

How do I change this or know my ability to use them?