find two different in a file
 

I want to find all line that have the word "test" & "error" .

I know "cat myfile |grep test" can show the line with the word test , if I also want to show the line with the word "error" , what can i do ? thx


ps. that means show the line that have the word "test" OR "error" , what can i do ? thx

Do you mean:
or
?

Lines which contain either "error" or "test"


thx

cat myfile | grep -e test -e error

There's no need to cat a file into grep, grep is quite capable of reading files all on its own:

Oh, sure! :)

You can use egrep for a shorter command syntax - see the output of the file below, and then egrep.

[11:45][root@francoisvn]/home/francoisvn # cat myfile
qwdqwidjqd
we
1312
235235235

123

test

1233twefvwd

error
12test
34error

[11:45][root@francoisvn]/home/francoisvn # egrep 'test|error' myfile
test
error
12test
34error