cd home
su
mkdir newfolder
cd newfolder
touch file{1..10}_{a..z}
find -type f -name "*x" -exec sed -i 's/^/hello linux/g' {} \;
mkdir {a..z}
for i in {a..z}; do find -type f -name "*$i" -exec mv {} $ /; ;done
find -type f -name "*3*" -o -name "*4*" -exec rm {} \;
