Trying to delete non-ASCII characters only [duplicate]

Answer 1

The suggested solutions may fail with specific version of sed, e.g. GNU sed 4.2.1.

Using tr:

tr -cd '[:print:]' < yourfile.txt

This will remove any characters not in [\x20-\x7e].

If you want to keep e.g. line feeds, just add \n:

tr -cd '[:print:]\n' < yourfile.txt

If you really want to keep all ASCII characters (even the control codes):

tr -cd '[:print:][:cntrl:]' < yourfile.txt

This will remove any characters not in [\x00-\x7f].