Ubuntu设置环境变量并立即生效

转载于：http://www.cnblogs.com/zhangpengshou/p/3537619.html

# /etc/profile: system-wide .profile file for the Bourne shell (sh(1))

# and Bourne compatible shells (bash(1), ksh(1), ash(1), ...).

if [ -d /etc/profile.d ]; then

for i in /etc/profile.d/*.sh; do

if [ -r $i ]; then

. $i

fi

done

JAVA_HOME=/usr/hadoop/jdk1.6.0_25

export JAVA_HOME

PATH=$PATH:$JAVA_HOME/bin

export PATH

CLASSPATH=.:$JAVA_HOME/lib

export CLASSPATH

unset i

fi

if [ "$PS1" ]; then

if [ "$BASH" ]; then

# The file bash.bashrc already sets the default PS1.

# PS1='\h:\w\$ '

if [ -f /etc/bash.bashrc ]; then

. /etc/bash.bashrc

fi

else

if [ "`id -u`" -eq 0 ]; then

PS1='# '

else

PS1='$ '

fi

fi

fi