Bash

I have recently been doing a fair bit of work on some DNS/DHCP appliances that are based on a version of RHEL, as a result I have started to use the Bash shell alot more. In the past on Solaris and HP-UX I have resorted to using KSH and had configured my .profile to pretty much work how I needed.

Although if I really wanted I am sure I could carry on using KSH and update the .profile to work with the RHEL boxes, however how boring. I decided to use Bash (various reason) I thought that I should probably get it to work exactly how I want, so here is my journey.

########### Source global definitions ################
if [ -f /etc/bashrc ]; then
. /etc/bashrc
fi
############# set the prompt ##########################
# uncomment out 1 and only one below....
# this is hostname and time
#PS1="\h-(\@): "
# this is hostname and history number
#PS1="\h-(\!)# "
# this is hostname and current working directory
PS1="\h-(\w)# "
# this is hostname and shortened current working directory
#PS1="\h-(\W)# "
############# path manipulation #######################
# add ~/bin to the path, cwd as well
PATH="$PATH:$HOME/bin:./"
################# env variables #######################

export PATH
unset USERNAME
###### User specific aliases and functions ############

Another profile that I used a lot when working on a number of Unix hosts;

      export PWD=`pwd`
        PS1=`uname -n`_'$LOGNAME # '
        export PS1

# Set up search paths

        if [ -d $HOME/bin ]
        then
        export PATH=$PATH:$HOME/bin
        fi

        if [ -d /opt/tsg/bin ]
        then
        export PATH=$PATH:/opt/tsg/bin
        fi

        if [ -d /usr/local/bin ]
        then
        export PATH=$PATH:/usr/local/bin
        fi

        if [ -d /usr/openwin/bin ]
        then
        export PATH=$PATH:/usr/openwin/bin
        fi

        if [ -d /usr/ucb ]
        then
        export PATH=$PATH:/usr/ucb
        fi

        if [ -d /opt/SUNWspro/bin ]
        then
        export PATH=$PATH:/opt/SUNWspro/bin
        fi

        PATH=/usr/sbin:$PATH:$HOME:/usr/etc
        export PATH

# Set up default creation mask to 755 (directory) and 644 (files)
        umask 022

# Set up the shell environment
        set -u
        trap "echo 'logout'" 0

# Prompt if terminal type is unknown
        if [ "$TERM" = unknown ] ; then

      export PWD=`pwd`
        PS1=`uname -n`_'$LOGNAME # '
        export PS1

# Set up search paths
        if [ -d $HOME/bin ]
        then
        export PATH=$PATH:$HOME/bin
        fi

        if [ -d /opt/tsg/bin ]
        then
        export PATH=$PATH:/opt/tsg/bin
        fi

        if [ -d /usr/local/bin ]
        then
        export PATH=$PATH:/usr/local/bin
        fi

        if [ -d /usr/openwin/bin ]
        then
        export PATH=$PATH:/usr/openwin/bin
        fi

        if [ -d /usr/ucb ]
        then
        export PATH=$PATH:/usr/ucb
        fi

        if [ -d /opt/SUNWspro/bin ]
        then
        export PATH=$PATH:/opt/SUNWspro/bin
        fi


        PATH=/usr/sbin:$PATH:$HOME:/usr/etc
        export PATH

# Set up default creation mask to 755 (directory) and 644 (files)
        umask 022

# Set up the shell environment
        set -u
        trap "echo 'logout'" 0

# Prompt if terminal type is unknown
        if [ "$TERM" = unknown ] ; then

                echo "Please enter Terminal Type - \c"
                read TERM
                export TERM
                echo
        fi

export EXSU=exsu
export TMP=/tmp

if [ `uname -r` = "B.10.20" ]
then
HISTFILE=$TMP/.sh_history.$LOGNAME
export HISTFILE
else
HISTFILE=$HOME/.sh_history
export HISTFILE
fi


HISTSIZE=1024
export HISTSIZE

echo "Checking DISPLAY variable."
export HOSTNAME=`hostname`

DISPLAY2=`who -mu | awk '{ print $8 }' | awk -F: '{ print $1 ":0" }'| sed 's/(//
          s/)//'`

if [ `uname -s` = "HP-UX" ]
then
xset -q > /dev/null 2>&1
if [ "$?" != "0" ]
then
        export DISPLAY=$DISPLAY2
        xset -q > /dev/null 2>&1
        if [ "$?" != "0" ]
        then
                DISPLAY=""
        fi
fi
else
        export DISPLAY=$DISPLAY2
fi

if [ -z "$DISPLAY" ]
then
        echo "Unable to set DISPLAY value.\n\n"
        unset DISPLAY
else
        echo "Display set to \"$DISPLAY\"\n\n"
fi