如何在构建时查看容器中的文件?

当我正在构建容器时,会收到下一条消息:

Step 13/29 : RUN source $PERLBREW_ROOT/etc/bashrc && perlbrew install -j 8 --notest --switch $PERL_VERSION
 ---> Running in a4efbc14a7b5

Fetching perl 5.24.1 as /opt/perlbrew/dists/perl-5.24.1.tar.bz2
Download http://www.cpan.org/authors/id/S/SH/SHAY/perl-5.24.1.tar.bz2 to /opt/perlbrew/dists/perl-5.24.1.tar.bz2
Installing /opt/perlbrew/build/perl-5.24.1/perl-5.24.1 into /opt/perlbrew/perls/perl-5.24.1

This could take a while. You can run the following command on another shell to track the status:

  tail -f /opt/perlbrew/build.perl-5.24.1.log

tail -f /opt/perlbrew/build.perl-5.24.1.log 如果还没有集装箱?