get substr?

syamkp · March 28, 2008, 3:50am

Hi,
I have a long string like,

This string is devided into one space between substrings. This substrings are,

Now i want to get paswd234 by searching corresponding ghijklmn
similarly want to get paswd345 by searching corresponding klllkkk

But above long string is dynamic, means may be some more substrings can add to this long string or may be some substrings can be removed from this long string.
could any one pls help me in this.
Thanks in advance.

syamkp · March 28, 2008, 4:13am

Forgot to mention one thing, In this long string

sometimes paswd234(8 chars) length may get change to less or more of 8 chars. Means the long string may be like,

vino · March 28, 2008, 4:31am

Do you want password for ghijklmn and klllkkk alone or do you want all the passwords ?

For all passwords

tr ' ' '\n' < input.txt | sed -n -e "s/.*|\(.*\)/\1/p"

syamkp · March 28, 2008, 5:33am

Thanks for your solution Vino,

I want pasword for individual. Actually i will give only one search string and want to fetch corresponding pasword for one execution of the command.

for example,
the search string is ghijklmn
and i want corresponding pasword.

era · March 28, 2008, 5:58am

Then modify the sed script to only print when that particular key is matched.

vino · March 28, 2008, 7:34am

string=ghijklmn
sed -n -e "s/.*${string}|\([^ ]*\) .*/\1/p" input.txt

But I think you would be better off with this sed statement and the above tr statement. Lest you dont run into a command too long.

syamkp · March 31, 2008, 2:08am

Thanks for your replies vino
your command is working fine.
but i am sorry, i didnt give correct input string. it is like,

This string is having . and _ so couldnt get result for me.
can you pls take the above string as an input string and can you give the command.