Partial retrieve


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# 1  
Partial retrieve

I have this in log file /var/log/maillog
Code:
XXX YYY ZZZ [55.66.77.88]:15214 I=[11.22.33.44]:25 AAA BBB CCC

I need awk/sed operation on this, so that it retrieves only the first IP.
Code:
cat /var/log/maillog | sed_operation
55.66.77.88

# 2  
Code:
awk -F"[][]" '{print $2}' /var/log/maillog
55.66.77.88

This User Gave Thanks to Jotne For This Post:
# 3  
Code:
perl -lne 'print $1 if /(\d+\.\d+\.\d+\.\d+)/' /var/log/maillog

This User Gave Thanks to rajamadhavan For This Post:
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