awk小技巧汇总

=====生成邮件发送人名单===================

#cat mail.txt

[e-mail]

[e-mail]

[e-mail]

#awk 'BEGIN{ORS=";"} {print $1}' mail.txt

[e-mail];[e-mail];[e-mail]

==============按某列求和==================

#cat test.txt

abc 123

cdf 324

def 232

#awk '{sum += $2};END{print sum}' test.txt 

679