Various bash scripts

bash_scripts.sh

# (1) mv with regexp
for i in *; do mv -n "$i" "${i/_*dpi*}".png; done;

# (2) Loop over array of strings
declare -a arr=("element1" "element2" "element3")

## now loop through the above array
for i in "${arr[@]}"
do
   echo "$i"
   # or do whatever with individual element of the array
done

# Access them using echo "${arr[0]}", "${arr[1]}"