bash while loop drops last line of text file [duplicate]

Answer 1

Note:

21545a21548
> yheebash-3.00$
      ^---- no line break

Your file doesn't terminate with a line break.

Answer 2

If you are wondering why?, this might satisfy your curiosity.

If you work with files which may or may not end up with a new line at end, you can do this:

while IFS= read -r line || [ -n "$line" ]; do
  echo "$line"
done <file

Or this:

while IFS= read -r line; do
  echo "$line"
done < <(grep "" file)

Read more:

1. https://stackoverflow.com/a/31397497/3744681
2. https://stackoverflow.com/a/31398490/3744681