Linux 三剑客之 awk（2）：awk 模块、变量与执行

[root@creditease awk]# awk 'BEGIN{RS="#"}{print $0}' awk.txt   ABC  DEF  GHI  GKL$123  BAC  DEF  GHI  GKL$213  CBA  DEF  GHI  GKL$321  

[root@creditease awk]# awk 'BEGIN{print "=======start======"}{print $0}' awk.txt   =======start======  ABC#DEF#GHI#GKL$123  BAC#DEF#GHI#GKL$213  CBA#DEF#GHI#GKL$321  

 [root@creditease files]# awk 'BEGIN{a=8;b=90;print a+b,a-c,a/b,a%b}'  98 8 0.0888889 8  

[root@creditease awk]# awk 'BEGIN{print "=======start======"}{print $0}END{print "=======end======"}' awk.txt  =======start======  ABC#DEF#GHI#GKL$123  BAC#DEF#GHI#GKL$213  CBA#DEF#GHI#GKL$321  =======end======  

[root@creditease awk]# grep "^$" /etc/services  |wc -l  17  [root@creditease awk]# sed -n '/^$/p' /etc/services |wc -l  17  [root@creditease awk]# awk '/^$/' /etc/services |wc -l  17  [root@creditease awk]# awk '/^$/{i=i+1}END{print i}' /etc/services  17  

[root@creditease awk]# seq 100|awk '{i=i+$0}END{print i}'  5050