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namespace.MD

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在新 network namespace 执行 sleep 指令：

unshare -fn sleep 60

查看进程信息

ps -ef|grep sleep
root       32882    4935  0 10:00 pts/0    00:00:00 unshare -fn sleep 60
root       32883   32882  0 10:00 pts/0    00:00:00 sleep 60

查看网络 Namespace

lsns -t net
4026532508 net       2 32882 root unassigned                                unshare

进入改进程所在 Namespace 查看网络配置，与主机不一致

nsenter -t 32882 -n ip a
1: lo: <LOOPBACK> mtu 65536 qdisc noop state DOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00