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# 1  
Old 09-26-2002
search and delete a line


I have a set of list that contains file names. I want to search through each of the list and delete any file that is found in the list.

LIST_A contains:

LIST_B contains:

assuming I want to delete 'aac' from the list and I don't know which of the list contains 'aac', what's the best way to search through the list and delete the file if found?

This is what i've tried
ans=`cat LIST_A | grep aac`
if [[ $ans = "" ]]
echo "Not found in LIST_A"
ans2=`cat LIST_B | grep aac`
if [[ $ans2 = ""]]
echo "Not founf in LIST_B"
** delete the line (How will I code this portion)**
** delete the line (How will I code this portion)**

I will appreciate whatever assistance I can get from you guys.


# 2  
Old 09-26-2002
Hi Odogbolu98


while read line
if [ "$line" = "acc" ]
echo "acc found and removed"
echo $line >> new_LIST_A
done < LIST_A

while read line
if [ "$line" = "acc" ]
echo "acc found and removed"
echo $line >> new_LIST_B
done < LIST_B

You will get new_LIST_A and new_LIST_B without the offending lines!

Hope this helps
Helen Smilie
# 3  
Old 09-26-2002
This can be done

for i in files
grep -vw "aac"<$i>$
mv $ $i
# 4  
Old 09-26-2002
Can you clarify if you want files deleting or if you want lines within your list of filenames removing?

# 5  
Old 09-26-2002
Thanks Bab00shka & ganti:

Bab00shka: In answering to your question:

Actually what I wanted it to remove the entire line where the string is found. So it's like deleting the whole line. I'll give both suggested solution a trial.


# 6  
Old 09-26-2002
You could use sed

sed '/acc/d' LIST_A > LIST_A.tmp
mv LIST_A.tmp > LIST_A
# 7  
Old 09-26-2002
sorry, bit of a typo. That should be

sed '/acc/d' LIST_A > LIST_A.tmp
mv LIST_A.tmp LIST_A

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