change / replace text in linux without open the file

 sed -i 's/short_open_tag = Off/short_open_tag = On/g' /etc/php/5.6/cli/php.ini

 

 

in this command, am changing just Off to On in php.ini file.

 

its works fine in ubuntu.

 

Cheers....!!!

 

#sed -i 's/original/new/g' file.txt

Explanation:

    sed = Stream Editor
    -i = in-place (i.e. save back to the original file)

    The command string:
        s = the substitute command
        original = a regular expression describing the word to replace (or just the word itself)
        new = the text to replace it with
        g = global (i.e. replace all and not just the first occurrence)

    file.txt = the file name