script to calculate time spent

[sangamesh.bc]

Hi All,

I need to calculate time period spent. The Start and End time are available in a file:

#cat trna.3000_3010.time
Tue Dec 25 11:10:25 IST 2007
Tue Dec 25 12:40:07 IST 2007

I did the following to get "seconds" numbers as follows.
# cat trna.3000_3010.time | cut -d " " -f 4 | cut -d : -f 3
25
07

Now I'm not getting, how to get these numbers(25, 07) individually and to store these in a variable.


Can any one tell how to do this?

- Sangamesh

[ghostdog74]

Hi All,

I need to calculate time period spent. The Start and End time are available in a file:

#cat trna.3000_3010.time
Tue Dec 25 11:10:25 IST 2007
Tue Dec 25 12:40:07 IST 2007

I did the following to get "seconds" numbers as follows.
# cat trna.3000_3010.time | cut -d " " -f 4 | cut -d : -f 3
25
07

Now I'm not getting, how to get these numbers(25, 07) individually and to store these in a variable.


Can any one tell how to do this?

- Sangamesh

cat file | cut -d " " -f 4 | cut -d : -f 3 | while read num
do 
 echo "do something with $num"
done

[Franklin52]

cat file | cut -d " " -f 4 | cut -d : -f 3 | while read num
do 
 echo "do something with $num"
done

Instead of using cat and cut 2 times you can use sed:

sed 's/.*:\(..\) .*/\1/' file | while read num
do 
 echo "do something with $num"
done

Regards

[ghostdog74]

Instead of using cat and cut 2 times you can use sed:

sed 's/.*:\(..\) .*/\1/' file | while read num
do 
 echo "do something with $num"
done

Regards

I hope OP gets the point. I wouldn't have done it like what OP did, or even with sed. cheers

[Franklin52]

I hope OP gets the point. I wouldn't have done it like what OP did, or even with sed. cheers

I know, something like "echo $(num:17:2)" is sufficient, it's not a offence to you but a point for the OP.

Regards

[ghostdog74]

I know, something like "echo $(num:17:2)" is sufficient, it's not a offence to you but a point for the OP.

Regards

no worries noted. I would use awk for myself if I have this problem, however I would rather show bash and its useful features to OP without the use of cut/sed/awk (for this purpose), just for OP to get the feel of bash.

while read -a line
do
  echo ${line[3]##*:}
done < "file"