How do i delete all trailing spaces from a file using sed?

maltiger

Man page for sed: https://www.lightnetics.com/post/3334

Sample file use for this, the dollars signs denote the end of the line, and show a space before the end of the line.

cat -A linefile 
This is line one $
1000$
This is line two $
2000$
This is line three $

Use this:

$ sed 's/ *$//' linefile | cat -A

Result, of course the $ signs are not part of the output, this is just to show the spaces were removed.
This is line one$
1000$
This is line two$
2000$
This is line three$