grep for multiple patterns

Shell Programming and Scripting
1

I have a file with many rows.
I want to grep for multiple patterns from the file.

For eg:
XX=123|YY=222|ZZ=566
AA=123|EE=222|GG=566
FF=123|RR=222|GG=566
DD=123|RR=222|GG=566

I want the lines which has both XX and ZZ.

I know I can get it like this.

grep XX file | grep YY

But I want to know whether I can do this in a single command.
like we do this

grep "XX|YY" file for grep either XX or YY

2 
$grep -e "XX" -e "YY" filename
3

Thanks for the quick reply.
Let me try this.

4

No, this command is wrong:

$ cat urfile
XX=123|YY=222|ZZ=566
AA=123|EE=222|GG=566
FF=123|RR=222|GG=566
DD=123|RR=222|GG=566
XX=123|YY=222|Zx=566
$ grep -e "XX" -e "YY" urfile
XX=123|YY=222|ZZ=566
XX=123|YY=222|Zx=566

Can use awk:

 awk -F="|" '/XX/&&/ZZ/' urfile
5

@rdcwayx,

Can you please what is wrong in that grep command ?

---------- Post updated at 03:10 AM ---------- Previous update was at 03:09 AM ----------

@rdcwayx,

Can you please tell, what is wrong in that grep command ?

6

btw, I expect the same result.

XX=123|YY=222|ZZ=566
XX=123|YY=222|Zx=566

But I expected some command like yours
awk -F"|" '/XX/&&/ZZ/' urfile

I will try this also.

Thanks

7

there is nothing technically wrong, just that YY should be ZZ. i think.

---------- Post updated at 04:09 AM ---------- Previous update was at 04:07 AM ----------

shell

while read -r line
do
    case "$line" in
        *XX*) f=1;;&
        *ZZ*)
            [ "$f" -eq 1 ] && echo $line;f=0;;
    esac
done < "file"
8

@skmdu and @rdcwayx

I tried both ways and got correct results for rdcwayx's command.

skmdu's command gave 'either' kind of results.
rdcwayx' command gave 'both' kind of results.

Thanks all.

9 
awk '/XX/&&/ZZ/' infile

should suffice. No need for the -F thingies.

If one key is always in a different field than the other then this should also work:

grep "XX.*ZZ" infile
10

Ok, I give the wrong sample to make your confused. Now I explain it again.

The request from tene is : need find out both XX and ZZ in one line.

So, if run your command:

grep -e "XX" -e "ZZ" urfile
XX=123|YY=222|ZZ=566
XX=123|YY=222|Zx=566

you will see the second line is incorrect. You command is same as

grep -E "XX|ZZ" urfile

---------- Post updated at 01:44 PM ---------- Previous update was at 01:42 PM ----------

not really, I also think to use grep by XX.*ZZ at first, but if ZZ is before XX, you will not get the correct answer.

11

Correct, one has to follow the other, perhaps I did not write that clear enough.