1. xargs


docker ps -a  | grep -v "CON" | awk '{print $1}' | xargs


2. sed


docker ps -a  | grep -v "CON" | awk '{print $1}' | sed ':a; N;s/\n/ /; ta'


N 代表两行合并一行,中间用\n替换, :a 做个标记, ta代表命令执行成功后会跳转到 :a, 所以这句话就是循环执行 N 并\n替换为空格来达到合并成一行的目的.

3.tr


docker ps -a  | grep -v "CON" | awk '{print $1}' | tr "\n" " "