关于linux下，ls vi等命令失效的解决方法(配置下环境变量出现问题)

export PATH=/usr/bin:/usr/sbin:/bin:/sbin:/usr/X11R6/bin
source

[root@son ~]# cat ~/.bash_profile 
# .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

JAVAHOME=/opt/bigdata/jdk180

export JAVAHOME

PATH=$JAVAHOME/bin:$PATH

export PATH

export JAVAHOME=/opt/bigdata/jdk180
export PATH=$PATH:$JAVAHOME/bin:$PATH

export CLASSPATH=.:$JAVAHOME/lib/dt.jar:$JAVAHOME/lib/tools.jar