How do I delete a data string from a .dat file in unix

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# 1  
Old 03-03-2008
How do I delete a data string from a .dat file in unix

I have a .dat file in unix and it keeps failing file validation on line x. How do I delete a data string from a .dat file in UNIX?

I tried the following:

sed -e 'data string' -e file name

and it telling me unrecognized command
# 2  
Old 03-03-2008
I would start with something simple before using sed:
Since you know what you dont want (the line with data string), why not:
cat file.dat|grep -v " nuisance string " >newfile.dat
# 3  
Old 03-03-2008
Excellent!! Big Shot Out To the Forum!!!!

Excellent!! Big Shot Out To the Forum!!!!
# 4  
Old 03-03-2008
I forgot to mention... I can't use the > with sudo... is there a command that is the inverse of the tee command?
# 5  
Old 03-04-2008
>I can't use the > with sudo.

Why not? (some little explanation on how you are/what you are trying to do what would help...)
Kindest regards
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