How to exclude a certain string in a search pattern

regular expressions

There are several exception messages in catalina.out file of tomcat server just like –

java.lang.NullPointerException

org.springframework.beans.factory.BeanCreationException

java.lang.RuntimeException

java.io.FileNotFoundException

We want to grep all exception error message except “java.io.FileNotFoundException” string.
Tried with below command but it’s not working.

cat catalina.out | grep '.*(?<\!=java.io.FileNotFound)Exception\*.)'

Can you please help to find out the correct command?

Best Answer

Try a multi-stage grep: cat <file> | grep Exception | grep -v java.io.FileNotFoundException

Related Solutions

Linux – grep to find files that contain a string greater than x characters long

I consider myself a regex noob, but I created a bunch of files with variable length strings in them and I think I got what you wanted, try this:

user@host$ grep -e '[^\ ]\{7,\}' *

For those who don't quite understand this:

-e makes grep search using a regex. [^\ ] means to match a single character except space. \{7,\} means to match a string of 7 or more characters. If you were to put another number afther , it would be strings between 7 and x characters.

Php – RegEx Match URL Pattern

What language are you using?

In general it sounds like you want something that matches the basic aspects of a domain, ruling out the possibility of a period other than the one that delinates the .tld.

#http://[^.]+\.(com|net|org)#i

If you don't want to match the protocal, maybe something like this.

#[^. ]+\.(com|net|org)#i

Your desire to handle multi-part TLD's will really screw this up, you will need to maintain a manual list of all the ones you want to match. The only alternative is to do DNS lookups to determine the listing type. There really isn't another way to extract subdomain data from the domain with a regular expression because by rights domains are actually just subdomains of some TLD (top level domain).

Edit: To match TLD's assuming they woudl have less than four characters, you can play around with something like this. You're going to have to work out what constitutes the start and end of a match. Are you requireing the presense of a protocal? Is this in a paragraph where somebody could type.a period out of context? If you give more details on the parameters we might be able to provide a more precise solution.

[^.]+((\.[^.]{0,3})+)

Best Answer

Related Solutions

Linux – grep to find files that contain a string greater than x characters long

Php – RegEx Match URL Pattern

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