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Multi line deletes

 
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# 1  
Old 08-15-2002
Multi line deletes
I would like to be able to delete the first n lines of a file from inside of a ksh script. I am not sure how to achieve this or if it is possible. Could someone please help. Thanks in advance.
# 2  
Old 08-15-2002
Not the best way....but it will work - I leave the moving to tmp file and coping over the old to you. $1 would be a parameter passed to the script - you might want to change that, add error checking, ...

#!/bin/ksh
linecount=`wc -l /var/adm/messages|awk '{print $1}'`
echo $linecount
kill_lines=$(($linecount-$1))
tail -$kill_lines /var/adm/messages
# 3  
Old 08-15-2002
Thanks RTM that works great. Smilie
# 4  
Old 08-15-2002
How about just using sed?

sed "1,10 d" input_file > temp ; mv temp input_file

If you want 'n' to be set as a variable - for whatever reason you can use

sed "1,$n d" ....
# 5  
Old 10-18-2002
Question
Is there a way that this can be done in perl?
# 6  
Old 10-18-2002
Computer
I figured this out. Smilie
 
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