Unix command for searching multiple keywords

Question

Need to check in the error log on UNIX server for multiple sites, ex. lets say there are 3 sites ABC.com, XYZ.com and OPQ.com. i want to get error log from server for any of these sites lies.

I tried with

tail -99999  /apache/log/error_log| grep 'ABC | XYZ | OPQ'

But was not working..

One way: grep -e "ABC" -e"XYZ" -e "OPQ'. Another way: grep -P 'ABC|XYZ|OPQ' — user184968
– user184968, Commented Apr 22, 2014 at 10:45

Rahul R Dhobi · Accepted Answer · 2014-04-22 10:57:35Z

3

tail -99999  /apache/log/error_log| grep -E '(ABC|XYZ|OPQ)'

or

tail -99999  /apache/log/error_log| grep -e ABC -e XYZ -e OPQ

answered Apr 22, 2014 at 10:57

Rahul R Dhobi

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vdudouyt · Accepted Answer · 2014-04-22 10:56:03Z

1

Just use egrep:

tail -99999  /apache/log/error_log| egrep '(ABC|XYZ|OPQ)'

answered Apr 22, 2014 at 10:56

vdudouyt

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Jotne · Accepted Answer · 2014-04-22 11:31:11Z

1

Using awk

tail -99999  /apache/log/error_log | awk '/ABC|XYZ|OPQ/'

answered Apr 22, 2014 at 11:31

Jotne

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