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为什么修改密码失败？ chpasswd：权限被拒绝

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为什么修改密码失败？ chpasswd：权限被拒绝

我的 Dockerfile

FROM ubuntu:latest
RUN apt update
RUN apt install -y openssh-server sudo 
RUN useradd -ms /bin/bash -g root -G sudo -u 1000 remote_user
USER remote_user
WORKDIR /home/remote_user
RUN mkdir /home/remote_user/.ssh && chmod 700 /home/remote_user/.ssh
COPY remotecentos.pub /home/remote_user/.ssh/authorized_keys
RUN stat /etc/passwd
RUN  echo 'remote_user:*****2599*****' | chpasswd -c SHA256
RUN service ssh start
EXPOSE 22
CMD ["/usr/sbin/sshd","-D"]

我收到错误

Step 9/13 : RUN stat /etc/passwd
 ---> Running in 7147677000bd
  File: /etc/passwd
  Size: 1325        Blocks: 8          IO Block: 4096   regular file
Device: 37h/55d Inode: 22961332    Links: 1
Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2022-10-06 12:45:10.000000000 +0000
Modify: 2022-10-06 12:45:10.000000000 +0000
Change: 2022-10-06 12:45:11.197943157 +0000
 Birth: 2022-10-06 12:45:11.197943157 +0000
Removing intermediate container 7147677000bd
 ---> 7b37835f7f2c
Step 10/13 : RUN  echo 'remote_user:******' | chpasswd -c SHA256
 ---> Running in faae63d7fd92
chpasswd: Permission denied.
chpasswd: cannot lock /etc/passwd; try again later.

如何修复容器内的权限？

我应该如何更改密码行？

答案1

您的 Dockerfile 将当前用户更改为remote_user调用之前的用户chpasswd。要使用chpasswd，您需要成为 root。您可能希望将该RUN行（以及任何其他需要超级用户权限的命令）移到该USER行之前。我还预计该ssh服务的启动会因类似原因而失败。

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