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if you want replace value in the file you need to add -i option to sed. For a correct replacement of the keyword $value you need to change the single quote to double quote:
sed...

in sed command use a double quote instead a single quote.

You can write the filenames replacing $1 and $2.
Or insert a variable like $MYFILE_1 and $MYFILE_2, in replace $1 and $2, and put the value in the head fo your big script file.

You write the code in a file called newfile.shMake this file executable with chmod 750 newfile.shrun with ./newfile.sh sec.txt disp.txtthe parameter -lt is "less than" you can also use -gt "greater...

Hi,

try this:

#!/bin/bash

if [ "$( cat $1)" -lt "$( sed -n '4 p' $2)" ]
then
echo "less than"
fi
with parameter sec.txt disp.txt