Old boy Education daily-92nd day-show print the first column of the Oldboy row

Topic

[email protected] oldboy# cat ip.log 10.0.0.1 oldboy10.0.0.2 oldgirl10.0.0.3 bingbing10.0.0.4 tingting10.0.0.4 Oldboy

Print the first column of the Oldboy row for the second columns

Reference Answer method one: While loop

Cat Match.shwhile Read Linedo name= ' echo $line |awk ' {print $} ' if ["$name" = "Oldboy"];then Echo $line |awk ' {print $} ' Fidone </oldboy/ip.log

Method Two: grep

[Email protected] oldboy]# Grep-po "\s+\s (? =oldboy)" Ip.txt 10.0.0.1 10.0.0.4 [[email protected] oldboy]# Grep-po "[0- 9.]+ (=oldboy) "Ip.txt 10.0.0.1 10.0.0.4

Method Three: SED

Sed-nr '/oldboy/s# (^[^]+). *$#\1#g ' ip.sh

Method Four: awk

awk ' $2~/oldboy/{print $ ' ip.sh

Note

Today is the 92nd Day of the day to accompany you and look forward to your progress .

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Old boy Education daily-92nd day-show print the first column of the Oldboy row