Extract values from a file

[daku21]

Hello,
Can somebody help me on the below.
i am trying to write a bash script in my linux red hat system in order to do the follow
i have the below text file, lets say "file1.txt" and i want my script (script1.sh) to extract two specific values, and these two values to be used in another script (script2.sh)

file1.txt
text 1 in to use..............................15243
text 2 in to use..............................A
text 3 in to use..............................OR
text 4 in to use..............................UNLL
text 5 in to use..............................1
text 6 in to use..............................N
text 7 in to use..............................00BN/12345D
text 8 in to use..............................ABC
text 9 in to use..............................11ADF/123E
text 10 in to use.............................N
text 11 in to use.............................N
text 15 in to use.............................07/12
text 16 in to use.............................17-96
text 17 in to use.............................Y

how to use script1.sh to read file1.txt and get in the 7th line the value "12345" with out "D", and in the 9th line the "123" value with out "E".
these two values i need to use in script2.sh

thank you,
daku

[numberwhun]

I hate to say, but this sounds a lot like homework. That said, I will guide you, but not write this for you.

You will want to start with a bash tutorial. You can google and there are many out there. http://goo.gl/RyL9mS

If you want to post code, we can help guide you through it. Just post the code (in code quotes) and provide us the error(s) you are seeing and what is expected.

Regards,

Jeff

[Luuk]

another hint:
awk (or gawk) seems a tool which could be usefull

Because:
1) i know how to solve this with gawk
2) read the man-pages for gawk and decide for yourself ;)

[daku21]

hello,
i created a one line bash script but i am not good in programming/linux.

#!/bin/bash
awk '/text 7 in to use'/ file1.txt
#

-rw-r--r-- 1 root root 3584 Jul 23 10:55 file1.txt
-rwxr-xr-x 1 root root 10 Jul 23 11:16 script.sh

can you help or advice with 'awk' command to print out the needed values and assign to variable.

thnx,

[sicarie]

You can look at what awk returns and how a shell script handles that. You can check out the awk manual page or just take a look at what is being printed out, and how to print the specific fields inside awk.

IMHO, I think you need a loop in a shell script to get down to the line you want (probably a for loop, but you could you a while if you wanted to), and then if you're on the right line, use awk to print out the values you want. I don't think you need variables, but a shell scripting tutorial would be able to tell you how to do that if you wanted to.

[Luuk]

#!/bin/bash
awk '/text 7 in to use/{ print substr($0,25,5)}/' file1.txt
 

you should change the 25, and probable the 5 too

read here more about string functions in awk

[Luuk]

But, more advanced, this is also possible

awk -F '.' '/text 7 in to use/{ print substr($NF,6,5) }' file1.txt
 

or even:

awk -F '/' '/text 7 in to use/{ print substr($NF,1,5) }' file1.txt