构建ubuntu20 pwn题目镜像出现cp: cannot overwrite non-directory ‘/home/ctf/lib‘ with directory ‘ /usr/lib‘

cp: cannot overwrite non-directory " /home/ctf/lib’ with directory ' /usr/lib ’ cp: cannot overwrite non-directory ’ /home/ctf/lib32’ with directory ’ /usr/lib32 ’ cp: cannot overwrite non-directory ' /home/ctf/lib64’ with directory ’ /usr/lib64 cp: cannot ove rwrite non-directory ’ /home/ctf/libx32’ with directory ‘/usr/libx3’

解决方法： https://github.com/fjh1997/pwn-server 如果是ubuntu 19以上（包括19）的镜像，请将base里的Dockerfile

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RUN cp -R /lib* /home/ctf && \
    cp -R /usr/lib* /home/ctf

改为

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RUN cp -R /usr/lib* /home/ctf

原因是ubuntu19以上采用了软连接模式。/lib*只是一个软链接