Linux Shell Scripting Bootcamp

Screen manipulation

We'll see another script in the next section that uses a loop to put text on the screen:

Chapter 3 - Script 4

#!/bin/sh
#
# 5/2/2017
#
echo "script4 - Linux Scripting Book"

if [ $# -ne 1 ] ; then
 echo "Usage: script4 string"
 echo "Will display the string on every line."
 exit 255
fi

tput clear                   # clear the screen

x=1
while [ $x -le $LINES ]
do
 echo "********** $1 **********"
 let x++
done

exit 0

Before executing this script run the following command:

echo $LINES

If the number of lines in that terminal is not displayed run the following command:

export LINES=$LINES

Then proceed to run the script. The following is the output on my system when run with script4 Linux:

Okay, so I agree this might not be terribly useful, but it does show a ...