Bash 环境初探

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# /etc/profile

# System wide environment and startup programs, for login setup
# Functions and aliases go in /etc/bashrc

pathmunge () {
	if ! echo $PATH | /bin/egrep -q "(^|:)$1($|:)" ; then
	   if [ "$2" = "after" ] ; then
	      PATH=$PATH:$1
	   else
	      PATH=$1:$PATH
	   fi
	fi
}

# ksh workaround
if [ -z "$EUID" -a -x /usr/bin/id ]; then
	EUID=`id -u`
	UID=`id -ru`
fi

# Path manipulation
	pathmunge /sbin
	pathmunge /usr/sbin
	pathmunge /usr/local/sbin

# No core files by default
ulimit -S -c 0 > /dev/null 2>&1

if [ -x /usr/bin/id ]; then
	USER="`id -un`"
	LOGNAME=$USER
	MAIL="/var/spool/mail/$USER"
fi

HOSTNAME=`/bin/hostname`
HISTSIZE=1000

if [ -z "$INPUTRC" -a ! -f "$HOME/.inputrc" ]; then
    INPUTRC=/etc/inputrc
fi

export PATH USER LOGNAME MAIL HOSTNAME HISTSIZE INPUTRC

for i in /etc/profile.d/*.sh ; do
    if [ -r "$i" ]; then
        if [ "$PS1" ]; then
            . $i
        else
            . $i >/dev/null 2>&1
        fi
    fi
done

unset i
unset pathmunge
alias ls='ls --color=auto'
export HADOOP_HOME=/data0/hadoop/hadoop-0.20.2
export PATH=$HADOOP_HOME/bin:$PATH
export JAVA_HOME=/data0/jdk/jdk1.6.0_33
export PATH=$PATH:$JAVA_HOME/bin
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

export ANT_HOME=/data0/ant1.8.2
export PATH=$PATH:$ANT_HOME/bin
export PATH=$PATH:/sbin
export LD_LIBRARY_PATH=/usr/lib:/usr/local/lib

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# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
    . ~/.bashrc
fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin

export PATH
unset USERNAME

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# .bashrc

# User specific aliases and functions

alias rm='rm -i'
alias cp='cp -i'
alias mv='mv -i'

# Source global definitions
if [ -f /etc/bashrc ]; then
    . /etc/bashrc
fi

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# /etc/bashrc

# System wide functions and aliases
# Environment stuff goes in /etc/profile

# By default, we want this to get set.
# Even for non-interactive, non-login shells.
if [ $UID -gt 99 ] && [ "`id -gn`" = "`id -un`" ]; then
	umask 002
else
	umask 022
fi

# are we an interactive shell?
if [ "$PS1" ]; then
    case $TERM in
	xterm*)
		if [ -e /etc/sysconfig/bash-prompt-xterm ]; then
			PROMPT_COMMAND=/etc/sysconfig/bash-prompt-xterm
		else
	    	PROMPT_COMMAND='echo -ne "\033]0;${USER}@${HOSTNAME%%.*}:${PWD/#$HOME/~}"; echo -ne "\007"'
		fi
		;;
	screen)
		if [ -e /etc/sysconfig/bash-prompt-screen ]; then
			PROMPT_COMMAND=/etc/sysconfig/bash-prompt-screen
		else
		PROMPT_COMMAND='echo -ne "\033_${USER}@${HOSTNAME%%.*}:${PWD/#$HOME/~}"; echo -ne "\033\\"'
		fi
		;;
	*)
		[ -e /etc/sysconfig/bash-prompt-default ] && PROMPT_COMMAND=/etc/sysconfig/bash-prompt-default
	    ;;
    esac
    # Turn on checkwinsize
    shopt -s checkwinsize
    [ "$PS1" = "\\s-\\v\\\$ " ] && PS1="[\u@\h \W]\\$ "
fi

if ! shopt -q login_shell ; then # We're not a login shell
	# Need to redefine pathmunge, it get's undefined at the end of /etc/profile
    pathmunge () {
		if ! echo $PATH | /bin/egrep -q "(^|:)$1($|:)" ; then
			if [ "$2" = "after" ] ; then
				PATH=$PATH:$1
			else
				PATH=$1:$PATH
			fi
		fi
	}

	# Only display echos from profile.d scripts if we are no login shell
    # and interactive - otherwise just process them to set envvars
    for i in /etc/profile.d/*.sh; do
        if [ -r "$i" ]; then
            if [ "$PS1" ]; then
                . $i
            else
                . $i >/dev/null 2>&1
            fi
        fi
    done

	unset i
	unset pathmunge
fi
# vim:ts=4:sw=4