shell code help please

themanwhowas · 09-15-2009, 03:11 AM

Hey,

2 questions regarding the shell.

1 - In a shell script i want several apps to run successively. ram1.pl, ram2.pl, ram3.pl etc. I've tried "./ram*" but that just ran the first script and stopped. Is there a way i can run these without typing them all out in the script?

2 - i want to get the output of 'time perl.pl' into a file. i tried 'time perl.pl > time.txt' but that didn't work. I tried echo `time perl.pl` > time.txt which also failed. I assume there is a way. Any help please?

Thanks

acid_kewpie · 09-15-2009, 03:22 AM

1)
for i in ram*
do
$i
done

2) the first way will work, unless it is being written to stderr instead of stdout. does changing > to 2> make a difference? If so, the code needs to be changed to use stdout properly.

lutusp · 09-15-2009, 05:28 AM

Quote:

Originally Posted by themanwhowas

Hey,

2 questions regarding the shell.

1 - In a shell script i want several apps to run successively. ram1.pl, ram2.pl, ram3.pl etc. I've tried "./ram*" but that just ran the first script and stopped. Is there a way i can run these without typing them all out in the script?

2 - i want to get the output of 'time perl.pl' into a file. i tried 'time perl.pl > time.txt' but that didn't work. I tried echo `time perl.pl` > time.txt which also failed. I assume there is a way. Any help please?

Thanks

1.

Code:

for fn in *.pl
do
   ./$fn
done

You asked for "successively". For simultaneous, do it this way:

Code:

for fn in *.pl
do
   ./$fn &
done

2.

Code:

/usr/bin/time -o time.txt ./perl.pl

The problem you were having with the second command arises from the fact that there are two "time" commands -- one a Bash builtin, the other a standalone with more features. This information comes to light by ... reading the manual.

Code:

$ man time

themanwhowas · 09-16-2009, 01:27 AM

Thanks guys. Very helpful.

linuxraja · 09-16-2009, 08:50 PM

Quote:

Originally Posted by themanwhowas

Hey,

2 questions regarding the shell.

1 - In a shell script i want several apps to run successively. ram1.pl, ram2.pl, ram3.pl etc. I've tried "./ram*" but that just ran the first script and stopped. Is there a way i can run these without typing them all out in the script?

2 - i want to get the output of 'time perl.pl' into a file. i tried 'time perl.pl > time.txt' but that didn't work. I tried echo `time perl.pl` > time.txt which also failed. I assume there is a way. Any help please?

Thanks

try ./ram* &

that should work (i think!)

linux

rahulruns · 09-18-2009, 04:12 AM