Hi,

I am trying to search a character in a file and remove it from that file....

My file looks something like this:
test1.txt
ckj12300_00|123|var1|10.2
ckj00200_12|444|var2|11.2
ckj00200_14|4556|var3|33.5
c00200_00_000|4558|var4|33.5
ckj00200_14|4553|var5|33.5
c00200_00_000|453|var7|33.5
ckj00200_14|454|var8|33.5
c00200_00_000|4567|var50|40.2

and so on....

I have to find rows that has c00200_00_000 and remove it from file(s). The files are about 33 MB and there are quite a few rows with c00200_00_000.

I tried grep -v c00200_00_000 test1.txt >test2.txt .....>This worked perfectly well but I am hit a space issue as I am copying the filtered data into another file test2.....
Is there a way I can remove it from test1.txt(original file) without creating a copy test2.txt....


Any help will be appreciated.....

pls don't cross post to multiple forums and use FAQ's and Google to find relative topics.

Hi rkumar28,
try this :

I test it with a file greater then yours, and it works.

# load file into memory
i=`cat test1.txt`
# remove old file
rm test1.txt
create new file without existing string "c00200_00_000"
for a in `echo $i`
do
echo $a | grep -v "c00200_00_000" >> test1.txt
done

# I hope it works in your environment