UNIX : How to ignore lines with certain names

Sometimes we need to ignore multiple lines with certain words and get the list out of the file. usually it will be a log file to read . The below grep command can be used to ignore multiple words present in a text file.

Lets say the file contain

$ cat list.txt
apple
orange
apple
banana
papaya

Now we need to ignore line with orange , banana and papaya . So we can use the below grep command.

$ cat list.txt | grep -Ev "orange|banana|papaya"
apple
apple

It will ignore lines with the words in -v part of grep.