Build a table from a list by comparing existing table entries


 
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# 1  
Old 12-22-2012
Build a table from a list by comparing existing table entries

I am new to this shell scripting....

I have a file which contains list of users. This files get updated when new user comes into the system.

I want to create script which will give a table containing unique list of users. When I say unique, it means script should match table while parsing user file list.

E.g.

List-----
User1
User2
User1
User3
User4
User1

The script output should be a list with

User1
User2
User3
User4

Thanks
# 2  
Old 12-22-2012
Code:
sort list.txt | uniq

# 3  
Old 12-22-2012
Or:
Code:
awk '!a[$0]++' file

# 4  
Old 12-22-2012
Thanks mjf.

Your suggestion solved my purpose.
Thanks for prompt answer.
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