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Shell Programming and Scripting

Delete a set of lines from a file

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# 1  
Old 10-25-2012
Delete a set of lines from a file
Hi All,
Am very new for this Shell scripting.
Could anyone pls let me know how to delete a set of lines from a (.DAT) file using ksh script.
for example from line 3 to line 7. The size of the target file is hugeSmilie

---------- Post updated at 11:01 PM ---------- Previous update was at 11:00 PM ----------

Smilie Smilie
# 2  
Old 10-25-2012
Code:
awk 'NR<3||NR>7' infile > outfile

# 3  
Old 10-25-2012
Code:
sed '3,7d' file.dat

This User Gave Thanks to RudiC For This Post:
kasthu12
# 4  
Old 10-25-2012
Thanks Rudic for the quick response...!!!
But if i view the file after the minute then the change what i made is not reflectingSmilie
Changes are not saved in the file
# 5  
Old 10-25-2012
Ouput needs to take another file like
Code:
sed '3,7d' file.dat >file_bk.dat

# 6  
Old 10-25-2012
if your sed supports -i then use like below.

Code:
 
sed -i '3,7d' file.dat

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