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Shell Programming and Scripting
delete lines from file2 beginning w/file1
Post 37645 by oombera on Tuesday 24th of June 2003 01:20:23 PM
06-24-2003
If file1 has a list of numbers like:
15
16
17
18
then after the loop is done looping, $cmd will end up equaling
-e /^15/d -e /^16/d -e /^17/d -e /^18/d
After insertion into the sed command, you end up with
sed -e /^15/d -e /^16/d -e /^17/d -e /^18/d < file2 > file3
The carat symbol is a special symbol.. -e /^/d will delete any line that has a beginning to it.
15
16
17
18
then after the loop is done looping, $cmd will end up equaling
-e /^15/d -e /^16/d -e /^17/d -e /^18/d
After insertion into the sed command, you end up with
sed -e /^15/d -e /^16/d -e /^17/d -e /^18/d < file2 > file3
The carat symbol is a special symbol.. -e /^/d will delete any line that has a beginning to it.
Last edited by oombera; 06-24-2003 at 02:26 PM..
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