sed练习

1.sed打印文本第一行和最后一行

[root@ecs-76840553 sed]# cat chongfu.txt 
test 30  
Hello 95  
Linux 85 
test 30  
Hello 95  
Linux 85 
test 30  
Hello 95  
Linux 85
[root@ecs-76840553 sed]# sed -n '1p' chongfu.txt  #打印第一行
test 30  
[root@ecs-76840553 sed]# sed -n '$p' chongfu.txt  #打印第最后一行
Linux 85
[root@ecs-76840553 sed]# 

2.删除第一行；添加11到第一行文本；修改3为333

[root@ecs-76840553 sed]# cat number.txt
1
2
3
[root@ecs-76840553 sed]# sed -i '1d' number.txt
[root@ecs-76840553 sed]# cat number.txt
2
3
[root@ecs-76840553 sed]# sed -i '1i11' number.txt
[root@ecs-76840553 sed]# cat number.txt
11
2
3
[root@ecs-76840553 sed]# sed -i '/3/c333' number.txt
[root@ecs-76840553 sed]# cat number.txt
11
2
333
[root@ecs-76840553 sed]#

 

标签：练习,number,sed,ecs,76840553,txt,root
来源： https://www.cnblogs.com/joyware/p/16664425.html