Experimental Physics and
Industrial Control System

"J. Lewis Muir" <[email protected]> · Tue, 20 Feb 2018 12:16:59 -0600

On 02/18, Mark Rivers wrote:
> There is one thing I do not understand is why grep finds the non-UTF8
> characters on Fedora 26, but apparent not on RHEL 7?  These are the
> same physical file on disk.  Can someone explain this?

Hi, Mark.

The locale settings might be different.  You can run the "locale"
command on both of those machines to show the current locale
and compare the output.  The locale settings can be changed by
setting environment variables, so you can play around with it
fairly easily. "locale -a" lists all available locales.  You can
use the LC_ALL environment variable to override the LANG and LC_*
environment variables.  The format of the locale name is usually
"language[_territory][.codeset][@modifier]".  On RHEL 6, the
setlocale(3) man page gives more info.

For example, in a Bourne shell, you could try:

$ LC_ALL=en_US.utf-8 grep -axv '.*' cmstypes.c

You could of course then change the value of the LC_ALL environment
variable to set the locale to match each of your two machines to see if
you can reproduce the behavior you're seeing.

Regards,

Lewis

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System