如何在linux中使用`for`循环获取文件的第二列？

Question

如何使用linux中的for循环获取文件的第二列？
ATTACHMENT vol-f66 i-26048111 /dev/sda1 attached 2013-11-20T06:42:49+0000 true ATTACHMENT vol-3db i-e1c443d6 /dev/sda1 attached 2013-11-21T12:38:09+0000 true

我想实现类似的东西 -

for /f "tokens=2" %%s in (%EC2_HOME%\Volumes.txt) do call ec2-create-snapshot %%s

Answer 1

将其反馈给awk '{print $2}'。您可以立即编辑\n的分隔符，也可以取消for循环。

实施例 -

echo "ATTACHMENT vol-f66 i-26048111 /dev/sda1 attached 2013-11-20T06:42:49+0000 true 
ATTACHMENT vol-3db i-e1c443d6 /dev/sda1 attached 2013-11-21T12:38:09+0000 true
ATTACHMENT vol-sdb i-e1c443d6 /dev/sda1 attached 2013-11-21T12:38:09+0000 true
ATTACHMENT vol-3ss i-e1c443d6 /dev/sda1 attached 2013-11-21T12:38:09+0000 true" | awk '{print $2}'

返回 -

vol-f66
vol-3db
vol-sdb
vol-3ss