#include <stdio.h>int main(){printf("This is Main()!\n");return 0;}
windeal@ubuntu:~/Windeal/Test$ sed -e ‘2d‘ -e ‘6c \\treturn 1;‘ test.c#include <stdio.h>int main(){printf("This is Main()!\n");return 1;}windeal@ubuntu:~/Windeal/Test$
windeal@ubuntu:~/Windeal/Test$ sed -f script test.c#include <stdio.h>int main(){printf("This is MyMain()!\n");printf("hello!\n");return 0;}windeal@ubuntu:~/Windeal/Test$
No. Name Chinese Math001 Jack 80 85002 Jane 90 90003 Ben 85 90004 Alice 85 95
windeal@ubuntu:~/Windeal/Test$ awk ‘{print "line:" NR "\t" $1 "\t" $3 "\t" $4}‘ stu.txtline:1 No. Chinese Mathline:2 001 80 85line:3 002 90 90line:4 003 85 90line:5 004 85 95windeal@ubuntu:~/Windeal/Test$
windeal@ubuntu:~/Windeal/Test$ awk ‘NR==1 {print} NR>1&&$4==90{print}‘ stu.txtNo. Name Chinese Math002 Jane 90 90003 Ben 85 90windeal@ubuntu:~/Windeal/Test$
windeal@ubuntu:~/Windeal/Test$ awk ‘{if(NR==1) printf "%10s %10s %10s %10s %10s\n",$1,$2,$3,$4,"Sum"}\NR>=2{Sum=$3+$4printf "%10s %10s %10s %10s %10s\n",$1,$2,$3,$4,Sum}‘ stu.txtNo. Name Chinese Math Sum001 Jack 80 85 165002 Jane 90 90 180003 Ben 85 90 175004 Alice 85 95 180windeal@ubuntu:~/Windeal/Test$
原文地址：http://blog.csdn.net/windeal3203/article/details/38554231
