Increasing Solr5 time out from 30 seconds while starting solr

[D]

Hi,

Many time while starting solr I see the below message and then the solr 
is not reachable.

|debraj@boutique3:~/solr5$ sudo bin/solr start -p 8789 Waiting to see 
Solr listening on port 8789 [-] Still not seeing Solr listening on 8789 
after 30 seconds!|

However when I try to start solr again by trying to execute the same 
command. It says that /"solr is already running on port 8789. Try using 
a different port with -p"/

I am having two cores in my local set-up. I am guessing this is 
happening because one of the core is a little big. So solr is timing out 
while loading the core. If I take one of the core out of solr then 
everything works fine.

Can some one let me know how can I increase this timeout value from 
default 30 seconds?

I am using Solr 5.2.1 on Debian 7.

Thanks,