~ TeeAhr1 /.bashrc

This is my first try at this, and very much a learning experience. Mostly a grab bag of stuff I found on this site, built around the default ubuntu .bashrc. Calls my .aliases file. NOTE: I am still trying to get bash to share history among concurrent sessions. PROMPT_COMMAND='history -a; history -n' is not doing it for me.
## ~./bashrc ##
# a learning experience

# ~/.bashrc: executed by bash(1) for non-login shells.
# see /usr/share/doc/bash/examples/startup-files (in the package bash-doc)
# for more examples

# This is not an interactive shell. Begone!
[ -z '$PS1' ] && return

## environment variables ##
# Connect to emacs if it's running, or start a new instance
# Did you add (server-start) to your ~/.emacs file?
export EDITOR='emacsclient -n' ALTERNATE_EDITOR='emacs' VISUAL='emacsclient'

## bash history ##
# Decent sized history
HISTSIZE=2500
HISTFILESIZE=2500
# Don't put duplicate lines in the history...
export HISTCONTROL=ignoredups
# ... and ignore same sucessive entries...
export HISTCONTROL=ignoreboth
# ... and ignore ls and cd (if they are called without arguments), and bg,
# fg, exit, and clear, _and_ any command prefaced with a space
export HISTIGNORE='&:clear:ls:cd:[bf]g:exit:[ t\]*'
# Append history instead of overwriting...
shopt -s histappend
# ... and append and re-read the history every time a prompt is displayed
PROMPT_COMMAND='history -a; history -n'

## some shopt options ##
# check the window size after each command and, if necessary,
# update the values of LINES and COLUMNS.
shopt -s checkwinsize
# correct minor spelling errors in cd
shopt -s cdspell
#include dotfiles in wildcard expansion, and match case-insensitively
shopt -s dotglob
shopt -s nocaseglob

# make less more friendly for non-text input files, see lesspipe(1)
[ -x /usr/bin/lesspipe ] && eval "$(lesspipe)"

# set variable identifying the chroot you work in (used in the prompt below)
if [ -z "$debian_chroot" ] && [ -r /etc/debian_chroot ]; then
    debian_chroot=$(cat /etc/debian_chroot)
fi

# set a fancy prompt (non-color, unless we know we "want" color)
case "$TERM" in
    xterm-color) color_prompt=yes;;
esac

# uncomment for a colored prompt, if the terminal has the capability; turned
# off by default to not distract the user: the focus in a terminal window
# should be on the output of commands, not on the prompt
#force_colored_prompt=yes

if [ -n "$force_color_prompt" ]; then
    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then
	# We have color support; assume it's compliant with Ecma-48
	# (ISO/IEC-6429). (Lack of such support is extremely rare, and such
	# a case would tend to support setf rather than setaf.)
	color_prompt=yes
    else
	color_prompt=
    fi
fi

if [ "$color_prompt" = yes ]; then
    PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
else
    PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
fi
unset color_prompt force_color_prompt

# If this is an xterm set the title to user@host:dir
case "$TERM" in
xterm*|rxvt*)
    PROMPT_COMMAND='echo -ne "\033]0;${USER}@${HOSTNAME}: ${PWD/$HOME/~}\007"'
    ;;
*)
    ;;
esac

## tab completion ##
# enable programmable completion features (you don't need to enable
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile
# sources /etc/bash.bashrc).
if [ -f /etc/bash_completion ]; then
    . /etc/bash_completion
fi

CDPATH=..:.:/:~:/media/bottom-drawer

## aliases ##
if [ -f ~/.aliases ]; then
    . ~/.aliases
fi

## functions ##
function extract () {
        if [ -f $1 ] ; then
                case $1 in
                        *.tar.bz2)        tar xjf $1                ;;
                        *.tar.gz)        tar xzf $1                ;;
                        *.bz2)                bunzip2 $1                ;;
                        *.rar)                rar x $1                ;;
                        *.gz)                gunzip $1                ;;
                        *.tar)                tar xf $1                ;;
                        *.tbz2)                tar xjf $1                ;;
                        *.tgz)                tar xzf $1                ;;
                        *.zip)                unzip $1                ;;
                        *.Z)                uncompress $1        ;;
                        *)                        echo "'$1' cannot be extracted via extract()" ;;
                esac
        else
                echo "'$1' is not a valid file"
        fi
}

function psgrep() {
        if [ ! -z $1 ] ; then
                echo "Grepping for processes matching $1..."
                ps aux | grep $1 | grep -v grep
        else
                echo "!! Need name to grep for"
        fi
}

# cd and ls
function cl {
case $1 in
-) cd -;ls;return;;
-*) local o=$1; shift;;
esac
cd $* && ls $o
}

# pushd to a specified package's documentation directory and ls it
function doc
{
  pushd "/usr/share/doc/$1" && ls
}

## welcome message ##
echo -ne "Morning, boss. It's "; date '+%A, %B %-d %Y'
uptime
echo -e ""; cal
echo -e "And now your moment of Zen:"; fortune