This is a long and twisted tale about the bits in setting up bash to my liking.

I use bash as my primary shell for managing multiple accounts as an ad-hoc system administrator and for my computational research projects which involve some really big computers.

Below is included my complete .bashrc wherein each of the customizations is implemented.

First let me describe the environment that all of these things are tuned for. I currently use Ubuntu at the office and I use Debian at home. From here I use either the console or an xfce4-term for all of my day to day command line shenanigans.

Once on the command line, the tools that are in my face everyday are GNU Screen, the Bash prompt, and SSH. These utilities are absolutely essential to getting anything accomplished for me. Since this page is about bash I will describe how I have customized everything so that I experience a minimum of interference with getting things accomplished.

…In Progress…

# ~/.bashrc: executed by bash(1) for non-login shells.
# see /usr/share/doc/bash/examples/startup-files (in the package bash-doc)
# for examples
 
# If not running interactively, don't do anything
[ -z "$PS1" ] && return
 
# Hack to get around kshell limitations
if [ -n "$KHOST" ]; then
	kinit fmrose &&	ktelnet -l fmrose $KHOST -e ""
	exit 0
fi
 
#add keys to ssh-agent
if [ -n "$SSH_AUTH_SOCK" ]; then
	if ssh-add -l |grep -q "The agent has no ident"; then
		ssh-add
	fi
fi
 
umask 022
# Source global definitions
[ -f /etc/profile ] && source /etc/profile
[ -f /etc/bashrc ] && source /etc/bashrc
[ -f /etc/bash.bashrc ] && source /etc/bash.bashrc
 
# Source my functions
if [ -d ~/.bash_functions ]; then
	for file in .bash_functions/*; do
		[ -f $file ] && source $file
	done
fi
 
# 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).
[ -f /etc/bash_completion ] && source /etc/bash_completion
 
# don't put duplicate lines in the history. See bash(1) for more options
export HISTCONTROL=ignoredups
# ... and ignore same sucessive entries.
export HISTCONTROL=ignoreboth
 
# check the window size after each command and, if necessary,
# update the values of LINES and COLUMNS.
shopt -s checkwinsize
shopt -s cdspell 
shopt -s dotglob
shopt -s histappend
 
#convenient abbreviations
export __B='froze@butsuri.homelinux.net'
export __M='froze@miles.chips.ncsu.edu'
export __O='froze@olympus.chips.ncsu.edu'
export __T='froze@titan.chips.ncsu.edu'
export __U='fmrose@unity.ncsu.edu'
export __C='froze@chips.ncsu.edu'
export __Q='froze@qianshoufo.chips.ncsu.edu'
export __OH='rosef@home.ccs.ornl.gov'
export __XTERM_OPT='-bg Black -fg Grey90 -geometry 210x70'
export PYTHONSTARTUP="${HOME}/.pythonrc.py"
export EDITOR='vim'
 
#Host specific setup
case ${HOSTNAME} in
	miles)
		MyPrompt=\$__M;
		export FHIPP_PATH="${HOME}/src"
		;;
	jaguar*)
		MyPrompt=setme\${USER}@\${HOSTNAME}
		if [ ${HOSTNAME} = "jaguar9" ]; then 
			cd
			module load vim/7.0 subversion fftw/2.1.5 >& /dev/null
			q () {
				echo "*************************************** SHOWUSAGE ***************************************" 
				showusage
				echo "*************************************** SHOWSTART ***************************************" 
				STAT=`qstat | grep $USER` && echo "$STAT"
				for JOB in `echo "$STAT" | cut -d" " -f1`; do
					showstart $JOB
				done
				echo "***************************************** SHOWQ *****************************************" 
				showq -u $USER
				echo "***************************************** SHOWBF ****************************************" 
				showbf
				}
		else
			ssh jaguar9 && exit
		fi
		;;
	olympus)
		MyPrompt=\$__O;
		alias units="/usr/bin/units -o %.8e --verbose"
		rrm () { wipe -frcs $@ & }
		[ -x ~/bin/ivars.sh ] && source ~/bin/ivars.sh
		;;
	butsuri)
		MyPrompt=\$__B;
		alias units="/usr/bin/units -o %.8e --verbose"
		rrm () { wipe -frcs $@ & }
		[ -x ~/bin/ivars.sh ] && source ~/bin/ivars.sh
		;;
	unity)
		MyPrompt=setme\${USER}@\${HOSTNAME}
		alias d=exit
		;;
	*)
		MyPrompt=setme\${USER}@\${HOSTNAME}
esac
# Keep $DISPLAY up to date
export SCR_DISP=${HOME}/.screen_display
if [ -z $DISPLAY ]; then 
	rm -f ${SCR_DISP}
	touch ${SCR_DISP}
elif [ -z $STY ]; then
	rm -f ${SCR_DISP}
	printf 'export DISPLAY=%s\n' $DISPLAY > ${SCR_DISP}
	printf 'export SESSION_MANAGER=%s\n' $SESSION_MANAGER >> ${SCR_DISP}
	printf 'export GNOME_KEYRING_SOCKET=%s\n' $GNOME_KEYRING_SOCKET >> ${SCR_DISP}
fi
 
#My pager preference
if [ -x /usr/bin/lesspipe ]; then
	eval "$(/usr/bin/lesspipe)"
elif [ ! -x /usr/bin/less ] ; then
	alias less more
fi
 
# 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
 
# If this is an xterm set the title to user@host:dir
case $TERM in
	xterm*)
		if [ -n "$STY" ]; then
			#PROMPT_COMMAND='history -a; source ${SCR_DISP}; echo -ne "\033k\033\ \010\033]0;${USER}@${HOSTNAME}: ${PWD}\007"'
			PROMPT_COMMAND='source ${SCR_DISP}; echo -ne "\033k\033\ \010\033]0;${MyPrompt}: ${PWD}\007"'
		else
			#PROMPT_COMMAND='history -a; source ${SCR_DISP}; echo -ne "\033]0;${USER}@${HOSTNAME}: ${PWD/$HOME/~}\007"'
			PROMPT_COMMAND='source ${SCR_DISP}; echo -ne "\033]0;${MyPrompt}: ${PWD/$HOME/~}\007"'
		fi
 
		PS1='\[\033[01;32m\]${MyPrompt}\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
		case $HOSTNAME in
			olympus|butsuri)
				eval `dircolors -b`
				LS_OPT='--color=auto'
				;;
			*)
				LS_OPT=''
				;;
		esac
	;;
	linux*)
		PS1='\[\033[01;32m\]${MyPrompt}\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
		eval `dircolors -b`
		LS_OPT='--color=auto'
		;;
	"")
		export TERM=dumb
		export PS1='\u@\h:\W\$ '
		LS_OPT=''
		;; #if TERM not set then it must be a "dumb" terminal.
	*)	;;
esac
 
#Some ls aliases
LS=`which ls`
alias ll="$LS $LS_OPT -l"
alias lh="$LS $LS_OPT -lh"
alias la="$LS $LS_OPT -al"
alias l="clear && $LS $LS_OPT -CF"
alias ls="$LS $LS_OPT"
unset LS
unset LS_OPT
 
#Some other aliass
alias cgrep="grep --color=auto"
alias ngrep="grep -n "
alias s="source ~/.bashrc; xrdb -merge ~/.Xresources 2>&1 /dev/null;"
alias scp="/usr/bin/scp -pr -c blowfish "
 
# Some environment variables that I find usefull.
[ -d ~/local/bin ] && export PATH=~/local/bin:${PATH}
[ -d ~/bin ] && export PATH=~/bin:${PATH}
export PATH=$PATH:./
 
if [ -f /usr/bin/x-terminal-emulator ]; then
	export TERMINAL=/usr/bin/x-terminal-emulator
else
	export TERMINAL=xterm
fi
 
# Shortcut for attaching or creating a screen session
a () {
	if [ -z "$1" ]; then
		SessionName=main
	else
		SessionName=$1
	fi
	case ${HOSTNAME} in
		butsuri|olympus	 ) if [ -n "$STY" ]; then
				$TERMINAL -e screen -UA -S $SessionName -xRR -e ^\`\` &
			else
				screen -UA -S $SessionName -xRR -e ^\`\` 
			fi ;;
		*)  if [ -n "$STY" ]; then
				$TERMINAL -e screen -UA -S $SessionName -xRR -e ^\`\` &
			else
				screen -UA -S $SessionName -xRR -e ^~~
			fi ;;
	esac
}
 
# do not actually delete files, just mv them to a .cruft directory.
#This needs to be made smarter
rm () {
	chk_flags=`echo $1 | cut -b 1`
	chk_dir=`basename $PWD`
	if [ $chk_flags = "-" -o $chk_dir = ".cruft" ]; then
		/bin/rm $@
	else
		mkdir -p ./.cruft
		Tstmp=`date +"%Y_%b_%d_%H_%M_%S"`
		for file in $@; do
			mv -f $file ./.cruft/${file}__${Tstmp}__
		done
	fi
}