Substitute String or line in a file
 

Hi all,

I have built a base configuration file (AWstats configuration file), I have to make a many customized configuration file from that file, and I need to write a script to do that.

the case is I need to substitute a certain lines in the base config file for every custom new file.

what command (or commands) should I user to search for the specified line, delete it , and put in my customized new line ?

Thanks for help.

Assuming the file you want to modify is abc.log
then ...
#>cat abc.log |perl -e ' foreach (<>) { s/SubtituteWhat/SubstituteWith/ig; print; } ' > abc_modified.log

Thanks , this works :) :)
Great idea with perl saneax.
it substitute a particular sentence or matching string , it is useful and i will need it later

but for now,, how can I remove the complete line that contains the "Search for what" string ?

i need to remove the complete line by matching a small part of it , then i need to place another line instead of it.

#>cat abc.log |perl -e ' foreach (<> ) { s/.+SubtituteWhat.+/SubstituteWith/i; print; } ' > abc_modified.log

regards

thanks again.