Extracting a substring from a string in unix


 
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# 1  
Old 05-14-2010
Extracting a substring from a string in unix

Hi,

I would like to extract a substring from a string in unix.

eg:

./checkfile.sh -- i need only checkfile.sh from this string.

Could someone help me out in this...

Regards
Arun
# 2  
Old 05-14-2010
Code:
echo "./checkfile.sh "| cut -d '/' -f2

or 

echo "./checkfile.sh " | awk -F"/" ' { print $2 } '

# 3  
Old 05-14-2010
Thanks Amit.

In my case, when i try to find the files in a directory and assign it to a variable using this command -
Code:
listfiles=`find . -name "*sh" -newer TODAY`
echo $listfiles

i get the output as below -

Code:
./file_check.sh
./check.sh

When i try either of the below commands -
Code:
echo "listfiles "| cut -d '/' -f2

or
Code:
echo "listfiles " | awk -F"/" ' { print $2 } '

the output i am getting is - file_check.sh .

I should get file_check.sh checkfile.sh

Could you please help me in this?

Regards
Arun

Last edited by zaxxon; 05-14-2010 at 01:51 AM.. Reason: use code tags please, ty
# 4  
Old 05-14-2010
Now redirect the out put to a file for the find command

Code:
find . -name "*sh" -newer TODAY > temp.txt


awk -F"/" ' { print $2 } '   temp.txt

# 5  
Old 05-14-2010
Thank u so much Amit.
# 6  
Old 05-20-2010
Hi Amit,

In this code,

Code:
find . -name "*sh" -newer TODAY > temp.txt
awk -F"/" ' { print $2 } '   temp.txt

We are getting field 2 and printing it in the terminal.
Will it be possible to resend the field 2 values back to the same file temp.txt replacing the existing data in that file?

Regards
Arun
# 7  
Old 05-20-2010
this could be a solution:

Code:
for file in $(find . -name "*sh" -newer TODAY)
do
echo $file | cut -d/ -f2
done

But if you want to use the script from any directory (not actual only):
Code:
search_path=$1
for file in $(find $search_path -name "*sh" -newer TODAY)
do
echo $file | awk -F"/" '{ print $NF}'
done

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