replace with sed in directory and sub directories

1. # goto the folder

cd ~/pentaho/repository/

2. # verify how many strings exist.

grep -R 192.168.1.11 .

3. # replace

find ./ -type f -exec sed -i -e 's/192.168.1.11/192.168.2.20/g' {} \;

4. # double check the result.

grep -R 192.168.2.20|wc -l