Checking files in a different folder using for loop

Question

I have 2 folder - folder1 and folder2.

Im in folder1 and need to execute a shellscript that will search for all the csv files in folder2..

The current script check *.csv in the current folder..how to point to folder2?

for file in *.csv
do
  split -l 50000 -d -a 4  "$file" "$file"
done

Answer 1

Assuming both folder1 and folder2 are under parent folder,

parent
   folder1
   folder2

You can rephrase your for loop as,

for file in ../folder2/*.csv

As a general rule, you can always give absolute paths to such loops:

for file in /home/username/parent/folder2/*.csv
do
    split -l 50000 -d -a 4  "$file" "$file"
done

The loop above will work irrespective of which directory you happen to be in.

Answer 2

You can use pushd and popd whenever you need to change directory for some operations and then change it back to the original.

pushd /path/to/folder2
for file in *.csv
do
  split -l 50000 -d -a 4  "$file" "$file"
done
popd