Replacing multiple lines with null

aress · 03-04-2007, 11:25 PM

Hi,

I want to replace few lines of malicious code fron php and html file with null. The code is found to be added at multiple places in a file.
Could anyone please suggest me ?

Thanks.
aress

aress · 03-05-2007, 01:18 AM

Hi,

Is there a way we can find the line number from a file matching soem pattern. I want to work on those line numbers.

Regards,
aress

SciYro · 03-05-2007, 01:56 AM

use grep, it can scan a file for a pattern and output the line, and line number. Dont know how to replace multiple line tho, probably something like awk, possibly sed.

archtoad6 · 03-06-2007, 08:47 AM

Code:

while :
do
  RT:^)M grep
  sleep $TIME
done

where TIME varies from minutes to weeks depending on circumstances.

Seriously, grep is one of the most useful text processing commands in the *nix CLI arsenal. Its options are numerous & powerful & it pays to refresh your memory of them periodically.

Same for sed & even more so for awk. With awk check the info system for the deep stuff. (Hint: Konqueror can display info system pages as html -- put "##<command>" in its address bar.)

In the case or your Q, if you use sed or awk, you may not need grep as both can operate only on lines matching a regex.