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. The file is about 33 MB and there are quite a few rows with c00200_00_000.

I tried grep c00200_00_000 test1.txt >test2.txt .....>This command only finds the c00200_00_000 and puts it in test2.txt but does not remove it from file....


Any help will be appreciated.....

try
grep -v

Try

awk '$0!~/c00200_00_000/' test1.txt > test2.txt

I hope it should work.

Thanks for the quick reply......I tried
grep - v and it worked....

I am hitting another problem using this......If I create another file(s)..I get into space issue.....Is there a way to remove the c00200_00_000 ....from the original file without creating a copy of it...

I tried something like this:
grep -v c00200_00_000 test1.txt >test2.txt ...> I am copying the filtered data into another file test2.....
Is there a way I can remove it from test1.txt without creating a copy test2.txt....

Thanks again for your time and reply.....

Using perl....

perl -pi~ -e "s/^c00200_00_000.*\n//" my_file

and using shell:

/bin/echo '/c00200_00_000/d\nwq!' | ex - test1.txt