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# 1  
Old 10-26-2006
Replace Characters...
In a file, How do I replace a set number of characters in each line?

For example.... substitute the first 54 characters of each line with mv?

Thanks!
Lisa
# 2  
Old 10-26-2006
'sed' is your friend - sed1liners
Code:
sed 's/^.\{54\}/mv/' myFile.txt

Last edited by vgersh99; 10-26-2006 at 05:23 PM..
# 3  
Old 10-26-2006
Code:
sed "s/^.\{54\}/mv/" x

# 4  
Old 10-26-2006
Thank you so much.... it was exactly what I needed!!

Can I just ask.... is the "." considered a wildcard in this code?
# 5  
Old 10-26-2006
Yes "." matches any character
# 6  
Old 10-26-2006
Quote:
Originally Posted by vgersh99
'sed' is your friend - sed1liners
Code:
sed 's/^.\{54\}/mv/' myFile.txt

vgersh99

I have a doubt in this. If i am inside the file that is
vi myFile.txt.
Then how can I use the command, should I use the sed word?
# 7  
Old 10-26-2006
no, but use the same 'substitute' expression in the vi 'command' mode.
 
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