Small script for primes (SOLVED)

[pepi37]

Hi to all
I made small sh script for searching primes inside RES file

echo "**** PRIMES FOUND ****"
echo " "
grep -h 'is prime!' /pepi/p*/lresu0000.txt | cut -d! -f1
echo " "
and if I in lresu0000.txt have output as

92*10^5573-1 is prime! (5575 decimal digits, P = 4) Time : 413.977 ms.

as result I got

92*10^5573-1 is prime

but I wont to get

92*10^5573-1 is prime! ( yes I wont ! mark)

So where is problem
If I use cut -d( - got syntax error ( ( is not expected)
What I write wrong?

Thanks

[Mark Rose]

You could easily add it back with sed:

grep -h 'is prime!' /pepi/p*/lresu0000.txt | cut -d! -f1 | sed 's/$/!/'

[Dubslow]

Put the ( in quotes. It's a special shell character, so sh isn't interpreting it as a simple argument to cut. Quoting it tells the shell you just want a literal (

[pepi37]

grep -h 'is prime!' /pepi/p*/lresu0000.txt | cut -d! -f1 | sed 's/$/!/'
Put the ( in quotes. It's a special shell character, so sh isn't interpreting it as a simple argument to cut. Quoting it tells the shell you just want a literal (
Both works perfect!


WOW
so many answers in two minutes
Thanks to all!

[paulunderwood]

cut -d\  -f1,3

There are 2 spaces after the "\"

[pepi37]

Originally Posted by paulunderwood

cut -d\  -f1,3

There are 2 spaces after the "\"

Sharp eyes!

[pepi37]

I will write in this topic ( to make forum clean)
I have four dir named p1 p2 p3 p4
Inside every dir is file called lresults.txt
I wont to make small sh script to copy content of all lresults.txt in one big file called results.txt outside those dir and after that deleting all lresults.txt inside all dir..

[EdH]

Originally Posted by pepi37

I will write in this topic ( to make forum clean)
I have four dir named p1 p2 p3 p4
Inside every dir is file called lresults.txt
I wont to make small sh script to copy content of all lresults.txt in one big file called results.txt outside those dir and after that deleting all lresults.txt inside all dir..

Try:

cat p*/lresults.txt > results.txt
rm p*/lresults.txt

Note: If you have any other p* directories with lresults.txt in them, they will also be included in the operation.

[pepi37]

EDH, works perfect!
Thanks!

And if I wont to delete content of lresults.txt but not lresults.txt itself, what to change?

found solution

for fname in /pepi/p*/lresults.txt
do
> $fname
done :)

[Xyzzy]

Originally Posted by EdH

Try:

cat p*/lresults.txt > results.txt
rm p*/lresults.txt

Note: If you have any other p* directories with lresults.txt in them, they will also be included in the operation.

A safer approach is:

cat p*/lresults.txt > results.txt && rm p*/lresults.txt

This code only runs the "second line" if the "first line" is successful.

A simple example that illustrates this concept:

$ whoami
m

$ cd /

$ touch a && ls
touch: cannot touch ‘a’: Permission denied

touch a; ls
touch: cannot touch ‘a’: Permission denied
bin  boot  dev  etc  home  initrd.img  lib  lib64  lost+found  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var  vmlinuz

The first command verifies that we are not root. The third command is conditional and the fourth command runs everything.

[Xyzzy]

Originally Posted by pepi37

And if I wont to delete content of lresults.txt but not lresults.txt itself, what to change?

cat /dev/null > p*/lresults.txt