Shell——在运用中学shell

我不会shell，因为我自己看过文档就忘。我不在意我会不会shell，只要偶尔会用…

以一个命令的输出批量执行另一条命令

唉，本来在看docker，看的烦了发现已经有了很多的container(把它当日志文件看就好–不要真的用这去理解docker)。就想给他删除了，删除命令是 docker rm id ，查看这些东西id的命令是docker ps -a，如图：

~ » docker ps -a                                                                                                                                      apple@yangkuideMBP
CONTAINER ID        IMAGE           COMMAND             CREATED         STATUS                     PORTS               NAMES
3015d440f386        ubuntu        \"apt-get *****\"     3 weeks ago     Exited (0) 3 weeks ago                         zealous_zhukovsky
c41226095976        ubuntu        \"apt-get *****\"     3 weeks ago     Exited (100) 3 weeks ago                       vigilant_kalam
26cfbd9995fe        ubuntu        \"sudo apt*****\"     3 weeks ago     Created                                        recursing_dirac
7579510db3d4        ubuntu        \"sudo apt-t***\"     3 weeks ago     Created                                        xenodochial_tereshkova
36d6b144da23        ubuntu        \"apt-get *****\"     3 weeks ago     Exited (100) 3 weeks ago                       adoring_kilby
c52edc378fc3        ubuntu        \"apt-get *****\"     3 weeks ago     Exited (0) 3 weeks ago                         pedantic_mcclintock
970b8ed39d72        ubuntu        \"apt-get i*****\"    3 weeks ago     Exited (100) 3 weeks ago                       vibrant_ardinghelli
c90e4875f34b        ubuntu        \"apt-get update\"    3 weeks ago     Exited (0) 3 weeks ago                         gallant_turing
bc4074f7749b        ubuntu        \"bash apt-*****\"    3 weeks ago     Exited (126) 3 weeks ago                       optimistic_euclid
a4dae07e99eb        ubuntu        \"apt-get  *****\"    3 weeks ago     Exited (100) 3 weeks ago                       hungry_morse

一条一条删太麻烦，想办法一行代码删完

1. 获取这些id docker ps -a|awk \'NR>1{print $1}\' # 将上面的输出用awk处理，只打印出id数据
   
   2.步子跨小点，先把这个输出给一个变量报存 res=$(docker ps -a|awk \'NR>1{print $1}\') ，然后看成功没echo $res
   

2.循环读取，然后执行删除 echo $res|while read i;do docker rm $i;done;

NICE ! 全部删除成功。下次遇见类似的场景直接一行命令下去。