I'm tailing a log file with -f flag. Then I'm piping this to grep, to find only lines that contain "X". That's working perfectly fine. Now I want to pipe this again into another grep, that will remove all the lines containing "Y". When I add the second pipe, the file stop refreshing and it looks like no data is coming.
This is the command that works:
tail -f my_file.log | grep "X"
This is the command that doesn't:
tail -f my_file.log | grep "X" | grep -v "Y"
How should I structure this so that the command works?