busybox_docker_2

[root@localhost ~]# docker run -it --rm busybox /bin/sh
/ # command -v groupadd
/ # echo $?
127
/ # addgroup -g 1003 container
/ # echo $?
0
/ # adduser -u 1003 -g 1003 container
adduser: uid '1003' in use
/ # echo $?
1
/ # addgroup -g 1004 container
addgroup: group 'container' in use
/ # addgroup -g 1004 ctr
/ # adduser -u 1004 ctr
adduser: uid '1004' in use
/ # addgroup -g 1005 ctr2
/ # adduser -u 1005 ctr2
adduser: uid '1005' in use
/ #