构建以下Docker文件时出现错误
FROM ubuntu:21.04
RUN apt-get update && \
apt-get install --no-install-recommends -y curl=7.\* && \
apt-get install --no-install-recommends -y unzip=6.\* &&\
rm -rf /var/lib/apt/lists/*
RUN apt-get update && \
mkdir -p /usr/share/man/man1 && \
apt-get install --no-install-recommends -y maven=3.6.3-5 && \
apt-get clean && \
rm -rf /var/lib/apt/lists/*
第二个 apt-get update
运行时会出现错误。
错误信息如下:
E: The repository 'http://security.ubuntu.com/ubuntu hirsute-security InRelease' is not signed.
W: GPG error: http://archive.ubuntu.com/ubuntu hirsute InRelease: gpgv, gpgv2 or gpgv1 required for verification, but neither seems installed
E: The repository 'http://archive.ubuntu.com/ubuntu hirsute InRelease' is not signed.
W: GPG error: http://archive.ubuntu.com/ubuntu hirsute-updates InRelease: gpgv, gpgv2 or gpgv1 required for verification, but neither seems installed
E: The repository 'http://archive.ubuntu.com/ubuntu hirsute-updates InRelease' is not signed.
W: GPG error: http://archive.ubuntu.com/ubuntu hirsute-backports InRelease: gpgv, gpgv2 or gpgv1 required for verification, but neither seems installed
E: The repository 'http://archive.ubuntu.com/ubuntu hirsute-backports InRelease' is not signed.
任何形式的帮助都将不胜感激。