Currently, the Eshell manual lists all the built-in commands in one 
section, which can make it hard to find the commands related to the 
topic you care about. Here's a patch to split this into subsections of 
various (loosely-defined) topics.

I welcome any suggestions about the division or the name of the 
subsections. For example, I split them into "Commands for Directories" 
and "Commands for Files", but an alternate scheme could be "Commands for 
Files and Directories" and "Commands for Changing the Current Directory".

Here's how I split the commands up in the patch, so you don't have to 
read through a huge diff:

# Commands for Directories
cd, dirs, du, ls, mkdir, popd, pushd, pwd, rmdir

# Commands for Files
cat, cp, diff, ln, mv, rm

# Commands for Searching
grep, agrep, egrep, fgrep, rgrep, glimpse, info, locate, man, occur

# Commands for Variables
env, export, set, setq, unset

# Commands for Using Other Commands
., addpath, alias, compile, jobs, kill, source, time, wait, which

# Miscellaneous Commands
basename, clear, clear-scrollback, date, dirname, echo, eshell-debug, 
exit, history, listify, make, printnl, umask, whoami