Thread: how to replace word with dot into underscore?

If you want to replace the dot with underscore in all the lines, then use the below sed command:

Code:

sed 's/\./_/g' input.dat

To restrict for a particular line, then specify a pattern

Code:

sed '/ONLINE/ s/\./_/g' input.dat

To restrict replacing for a particular word:

Code:

sed  's/\(ONLINE\)\.\(job\)/\1_\2/g' input.dat

thanks for your reply anitha....

But ONLINE.JOB is just a example word. I have so many words like this. it will come in iteration way....

Now var i has the word with dot operator..

i = A.b (FIRST TIME)
I=JJJ.B (2ND TIME)

........
.......
LIKE WISE IT IS GOING ON.

So I Need general solution.... like word may be whatever ..... we need to change dot operator to underscore.

The following shell script might work for you:

Code:

#!/bin/bash

SEARCH_WORD='ONLINE.job'
SEARCH_WORD=`echo $SEARCH_WORD|sed 's/\./\\\\./g'`
FILENAME='input.dat'
REPLACE_WORD=`echo $SEARCH_WORD| sed 's/\./_/'`
eval "sed 's/$SEARCH_WORD/$REPLACE_WORD/g' $FILENAME"

Use the above code in a while loop for iterations.