Usefull Linux comands.

  1. How to recursively change search and replace string in all files.

find /home/user/ -type f | xargs sed -i 's/a.example.com/b.example.com/g'

 

2. core dumps related. and system settings.

http://www.idimmu.net/2013/06/21/enable-linux-core-dump/

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