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solved problem by myself. thanx all anyway and i couldnt find delete post button.

solution for this problem:

if [ -z "$1" ] # if there is no input
then
echo "enter the number of days"
exit 0
fi


touch rebootSwap.txt
last reboot > rebootSwap.txt
number=$1
for ((...

probably we are at the same class with this guy. he is trying to say this problem..

(20 pts) Write a shell script which includes a single argument which is a number.
Then, it will show the...