centos6.9配置环境变量时出错-导致linux命令不能用

centos6.9配置环境变量时出错-导致linux命令不能用

解决方法(感谢运维朋友的支持)

/etc/profile备份（以防万一以后再写错）

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

# It's NOT a good idea to change this file unless you know what you
# are doing. It's much better to create a custom.sh shell script in
# /etc/profile.d/ to make custom changes to your environment, as this
# will prevent the need for merging in future updates.

pathmunge () {
case ":${PATH}:" in
*:"$1":*)
;;
*)
if [ "$2" = "after" ] ; then
PATH=$PATH:$1
else
PATH=$1:$PATH
fi
esac
}

if [ -x /usr/bin/id ]; then
if [ -z "$EUID" ]; then
# ksh workaround
EUID=`/usr/bin/id -u`
UID=`/usr/bin/id -ru`
fi
USER="`/usr/bin/id -un`"
LOGNAME=$USER
MAIL="/var/spool/mail/$USER"
fi

# Path manipulation
if [ "$EUID" = "0" ]; then
pathmunge /sbin
pathmunge /usr/sbin
pathmunge /usr/local/sbin
else
pathmunge /usr/local/sbin after
pathmunge /usr/sbin after
pathmunge /sbin after
fi

HOSTNAME=`/bin/hostname 2>/dev/null`
HISTSIZE=1000
if [ "$HISTCONTROL" = "ignorespace" ] ; then
export HISTCONTROL=ignoreboth
else
export HISTCONTROL=ignoredups
fi

export PATH USER LOGNAME MAIL HOSTNAME HISTSIZE HISTCONTROL

# By default, we want umask to get set. This sets it for login shell
# Current threshold for system reserved uid/gids is 200
# You could check uidgid reservation validity in
# /usr/share/doc/setup-*/uidgid file
if [ $UID -gt 199 ] && [ "`/usr/bin/id -gn`" = "`/usr/bin/id -un`" ]; then
umask 002
else
umask 022
fi

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

unset i
unset -f pathmunge

#export JAVA_HOME=/usr/local/hadoop/jdk1.8.0_161
#export PATH =${JAVA_HOME}/bin/:$PATH
#export CLASSPATH=.:${JAVA_HOME}/lib/dt.jar:${JAVA_HOME}/lib/tools.jar

export JAVA_HOME=/usr/local/hadoop/jdk1.8.0_161
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

export HADOOP_HOME=/usr/local/hadoop/hadoop-2.6.0-cdh5.7.6
export PATH=${HADOOP_HOME}/bin:${HADOOP_HOME}/sbin:$PATH

export HIVE_HOME=/usr/local/hadoop/hive-1.1.0-cdh5.7.6
export PATH=${HIVE_HOME}/bin:$PATH

export SCALA_HOME=/usr/local/hadoop/scala-2.12.4
export PATH=${SCALA_HOME}/bin:$PATH

export SPARK_HOME=/usr/local/hadoop/spark-1.6.0-cdh5.7.6
export PATH=${SPARK_HOME}/bin:${SPARK_HOME}/sbin:$PATH