作业一

mkdir study
touch study/WETOS_class{1,2}_linux{1..6}
mkdir /tmp/VERSION
touch redhat_version{1..8}  ./tmp/VERSION
cp  ./tmp/VERSION redhat_version{1,3,5,7}  ./SINFLE
cp  ./tmp/VERSION redhat_version{2,4,6,8}  ./DOUBLE
mv   ./study/*class1*   CLASS1
mv   ./study/*class2*   CLASS2
cp /etc/*[[：digit：]]*.conf   confdir
rm -fr *