Unix services restart

Restart network services
services network restart

grep search

To recursively search for a string in Linux
grep -ir searchstring *

To match exact search string
grep -w searchstring *

Ex:
line1: 192.168.80.14
line2: 192.168.80.141

grep 192.168.80.14 * will return both lines
grep -w 192.168.80.14 * will return only first line

To limit no. of grep results
grep searchstring * -m 1

Ex:
line1: 192.168.80.14
line2: 192.168.80.141

grep 192.168.80.14 * will return both lines
grep 192.168.80.14 * -m1 will return only one line