unix: how to concatenate files matched in grep

Question

I want to concatenate the files whose name does not include "_BASE_". I thought it would be somewhere along the lines of ...

ls | grep -v _BASE_ | cat > all.txt

the cat part is what I am not getting right. Can anybody give me some idea about this?

Answer 1

Try this

ls | grep -v _BASE_ | xargs cat > all.txt