linux环境变量备份,Linux环境变量的备份与恢复

在开发过程中对环境变量的修改是难免的，手工修改环境变量痛苦不言而喻，而export也只能影响到当前shell的。在脚本中修改的变量只能通过source才能使父shell生效。自己写了一个备份环境变量和恢复的脚本，有待完善，但能用。

BAK="env.bak"

function bak(){

echo "export PATH=$PATH" > ${BAK}

echo "export LD_LIBRARY_PATH=$LD_LIBRARY_PATH" >> ${BAK}

echo "export SDGHOME=$SDGHOME" >> ${BAK}

echo "export ORACLE_HOME=$ORACLE_HOME" >> ${BAK}

}

function change(){

AR=$1

RE=`sed -n '/${AR}=/'p ${RC}`

RB="export `sed -n '/${AR}=/'p ${BAK}`"

if [ "${RE}" == "" ];then

echo ${RB} >> ${RC}

else

sed -i "s/^(${AR}=).*/&${RB}" >> ${RC}

fi

}

function restore(){

RC=~/.bashrc

change "PATH"

change "LD_LIBARY_PAHT"

change "SDGHOME"

change "ORACLE_HOME"

}

short_options="b:r:n"

long_options="back:,restore:,name:"

opts=`getopt -o $short_options --long $long_options`

case $1 in

-b|--back)

echo "back enviroment, you can use "source ${BAK}" use bak enviroment"

bak

;;

-r|--restore)

echo "restore enviroment for [[`whoami`]],you must user new show,enable this enviroment"

restore

;;

-n|--name)

BAK=$1

;;

*)

echo "Internal error!"

exit 1

;;

esac