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Modifying a particulae data in a line contained in File


 
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# 1  
Old 10-05-2009
Modifying a particulae data in a line contained in File

Hi,

I have a file containing data:

systemname/userid/password/comment
systemname1/userid1/password1/comment1
systemname2/userid2/password2/comment2

I want to modify the "password" using script.

Can anybody help me with this problem?Smilie
# 2  
Old 10-05-2009
Something like this would do the trick:
Code:
sed '/userid/s/oldpasswd/newpasswd/' inputfile > tempfile && \
cp tempfile inputfile && \
rm tempfile

Where the /userid/ means that the sed statement will only replace (substitute) "oldpasswd" with "newpasswd" for the userid given and not any other.

Is that what you are after?
# 3  
Old 10-05-2009
Looks like a homework or something. What have you tried so far?
 

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