find and replace

Shell Programming and Scripting
1

Hi,
I have to grep value from one file, if that value is already present with "#" symbol. I have to remove that symbol in that file.

Ex:
file1.txt contains the following string

#value=15

I have to search for "Value". If I found the string with hash symbol, nee to remove the # in the file1.txt.

Please help on this.

Thanks,
Chelladurai.

2 
perl -i.bck -pe's/#value/value/' file1.txt
3 
cat file1.txt | sed 's/#//g' > temp_file
mv temp_file file1.txt
4

Hi,
Thanks for your reply. But i need to apply this in my shell scrpt.

Because, I want to validat the string in the file then replace it. Every loop contains different string values.

Like

perl -i.bck -pe's/#$tempvar/$tmpvar/' file1.txt

Could you please assist on this.... ????

5 
# awk '/value/{if($0~/^#/)sub("^#","")}1' file
6

Use:

perl -i.bck -pe's/#$ENV{tempvar}/$ENV{tempvar}/' file1.txt

The variable tempvar must be exported.

7

Thanks for the reply. Its working fine.... :slight_smile: