UNIX for Dummies Questions & Answers

egrep "[1-9][0-9]{2,}\.*[0-9]*\%" /home/oscar/Desktop/tail.util

egrep -q ... && echo hello || echo bye

if egrep -q ...    ; then

root@oscar-VirtualBox:/home/oscar# sed -r  's/^[^0-9]*([0-9]+.[0-9]).*/\1/' /home/oscar/Desktop/tail.util
76.3
root@oscar-VirtualBox:/home/oscar#

but now if I try t set the output(76.3) into a variable I got the command insted of the number 76.3 when do an "echo":

root@oscar-VirtualBox:/home/oscar# a="sed -r  's/^[^0-9]*([0-9]+.[0-9]).*/\1/' /home/oscar/oscar.txt"
root@oscar-VirtualBox:/home/oscar# echo $a
sed -r 's/^[^0-9]*([0-9]+.[0-9]).*/\1/' /home/oscar/oscar.txt
root@oscar-VirtualBox:/home/oscar#

$ cat tail.util
The Device      file is now  80.1% full with room for   3.3 more full days
$ egrep -q  "[1-9][0-9]{2,}\.*[0-9]*\%" tail.util && echo hello || echo bye
bye
 
 
$ cat tail.util
The Device      file is now 180.1% full with room for   3.3 more full days
$ egrep -q  "[1-9][0-9]{2,}\.*[0-9]*\%" tail.util && echo hello || echo bye
hello

if egrep -q  "[1-9][0-9]{2,}\.*[0-9]*\%" tail.util 
then
    echo hello
else
    echo bye
fi

egrep -o  "[1-9][0-9]{2,}\.*[0-9]*\%" tail.util | while read PCT
do
    echo "found value $PCT greater than 100%"
done

a=$( sed -r 's/^[^0-9]*([0-9]+.[0-9]).*/\1/' /home/oscar/Desktop/tail.util )
echo "$a"