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Shell Programming and Scripting

redirect after the diff

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# 1  
Old 04-28-2008
redirect after the diff
hi,

i have 2 file of the same kind

file_old and file_new

there are few extra things added in new file

i want to make diff file_old file_new > file_update

( file_update are the new things added as compare to the old file )

i can i make it clearly . bcoz in diff it show all the diff among

could someone please help me in that.
# 2  
Old 04-29-2008
Code:
comm -13 old new

# 3  
Old 04-29-2008
its now working...
can u please suggest other way
# 4  
Old 04-29-2008
Maybe you need only new lines from file_new that don't exist on file_old
Code:
grep -vf file_old file_new

# 5  
Old 04-29-2008
what i am looking is

for eg:

file_old contains

abc1
abc2
abc3
abc4

file_new contains

abc1
abc2
abc3
abc4
abc5
abc6

is if i run the diff

i want

abc5
abc6
to be displayed
# 6  
Old 04-30-2008
try this

diff old new | awk '{print $2}'

cheers
# 7  
Old 04-30-2008
still it is not working acording to my require..
please help me on that
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