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Removing lines from one list from another list.

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# 1  
Old 07-01-2010
Removing lines from one list from another list.
Hello,

I was wondering if there was an easy way to take lines from a single-column list, and remove them from a second single-column list. For example, I want to remove the contents of list 1 from list 2. How would I do this?

Contents of list 1:

Code:
server1a
server2b
server3c
server4a
server5qb
server6ocd

Contents of list 2"
Code:
server1a
server2b
server3c
server4a
server5qb
server6ocd
server7dgw
server8sg
server9be
server10zt
server11w
server12t
server13f

# 2  
Old 07-01-2010
Hi

Assuming your list1 is in file1, list2 in file2

Code:
grep -v -f file1 file2

Guru.
This User Gave Thanks to guruprasadpr For This Post:
LinuxRacr
# 3  
Old 07-01-2010
Thank you. I didn't know it was that simple.

---------- Post updated at 01:25 PM ---------- Previous update was at 12:18 PM ----------

Also the comm command:

Print all lines that appear in file2 but not in file1 (in other words, print column 2):

Code:
 comm -13 file1 file2

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