awk企业案例集

ftp-data 20/tcp
ftp-data 20/udp
# 21 is registered to ftp, but also used by fsp
ftp 21/tcp
ftp 21/udp fsp fspd
ssh 22/tcp # The Secure Shell (SSH) Protocol
ssh 22/udp # The Secure Shell (SSH) Protocol
telnet 23/tcp
telnet 23/udp

[root&＃64;linux-node1 files]# awk -F "[ /]&＃43;" &＃39;$1~/^(ftp|http|https|mysql|ssh|ftp-data)$/ {print $1,$2}&＃39; /etc/services |sort -nk2|uniq
ftp-data 20
ftp 21
ssh 22
http 80
https 443
mysql 3306

[root&＃64;linux-node1 files]# awk -F "[ /]&＃43;" &＃39;$2~/^(80|443|3306|23|22|25|21)$/ {print $1,$2}&＃39; /etc/services |sort -nk2|uniq|grep -v "#"
ftp 21
ssh 22
telnet 23
smtp 25
http 80
https 443
mysql 3306

[root&＃64;linux-node1 files]# awk &＃39;NR>&＃61;2&&NR<&＃61;5 {print NR,$0}&＃39; /etc/passwd
[root&＃64;linux-node1 files]# awk &＃39;NR&＃61;&＃61;2,NR&＃61;&＃61;5 {print NR,$0}&＃39; /etc/passwd
2 bin:x:1:1:bin:/bin:/sbin/nologin
3 daemon:x:2:2:daemon:/sbin:/sbin/nologin
4 adm:x:3:4:adm:/var/adm:/sbin/nologin
5 lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin

sed -n &＃39;2,5p&＃39; /etc/passwd　　# 取行建议用sed命令