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‘
3.tr
docker ps -a | grep -v "CON" | awk ‘{print $1}‘ | tr "\n" " "
原文：https://www.cnblogs.com/lishuaiqi/p/15102335.html