 | Chapter 42 Problems with Terminals |  |
| Chapter 42 Problems with Terminals | |
This script uses the
yes (23.4)
command to send 79-character lines
of columns to the terminal over and over, as fast as possible.
It's been useful for me when I'm looking for dropped characters,
dialup noise, and other problems on a terminal or connection.
The -b (blanks) option sends a screen full of space characters
with an asterisk (*) in column 77-watching this column is
an easy way to look for added or dropped characters without distractions.
Use
your interrupt key (5.9)
(like CTRL-c)
to kill the script when you're done.
The two yes command lines that follow have been broken into two pieces for printing. You should enter them all on one line.
exec |
#! /bin/sh
# USE yes PROGRAM TO PRINT CHARACTER STRINGS FOREVER:
case "$1" in
"") exec yes '()*+,-./ 01234567 89:;<=>? @ABCDEFG
HIJKLMNO PQRSTUVW XYZ[\]^_ `abcdefg hijklmn' ;;
-b) exec yes '
*' ;;
*) echo "Usage: `basename $0` [-b]" 1>&2; exit 1;;
esac |
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| 42.6 Screen Size Testing Files |  | 42.8 Errors Erased Too Soon? Try These Workarounds |
