未知指令在Docker文件中RUN
嗨，这是我的Docker文件。 我在安装Maven的时候出错，找不到“ls -s”软链接命令。 请帮我解决一下这个。
# We first will give the base image details for the tag "FROM" OS:Version FROM centos:latest #who will maintain the image MAINTAINER XYZ <XYZ@gmail.com> RUN yum install -y httpd curl sed grep egrep fgrep wget git net-tools zip unzip which source openssh-server #JAVA INSTALLATION ADD http://www.mediafire.com/file/177sevky311fbdh/jdk-8u144-linux-x64.rpm / RUN rpm -ivh jdk-8u144-linux-x64.rpm ENV JAVA_HOME="/usr/java/jdk1.8.0_144" ENV JRE_HOME="/usr/java/jdk1.8.0_144/jre" #MAVEN INSTALLATION ADD https://www.mediafire.com/folder/6b0t6el85gtof/maven / RUN mv /maven /opt/maven ln -s /opt/maven/bin/mvn /usr/bin/mvn && \ wget http://www.mediafire.com/file/gpg2arhygj0a0wy/maven.sh && \ mv /maven.sh /etc/profile.d && \ chmod 755 /etc/profile.d/maven.sh RUN cp /etc/ssh/sshd_config /etc/ssh/sshd_config.original && \ chmod aw /etc/ssh/sshd_config.original && \ mkdir /var/run/sshd && \ echo 'root:screencast' | chpasswd && \ sed -i 's/PermitRootLogin without-password/PermitRootLogin yes/' /etc/ssh/sshd_config CMD ["/usr/sbin/sshd, "-D"] EXPOSE 22 您需要添加一个&&\来连接RUN命令
否则，Dockerfile将无法将ln解释为Dockerfile命令 （如RUN ， COPY ， ADD ，…）
RUN mv /maven /opt/maven &&\ <============== missing ln -s /opt/maven/bin/mvn /usr/bin/mvn && \
或者至less添加第二次运行
RUN mv /maven /opt/maven RUN ln -s /opt/maven/bin/mvn /usr/bin/mvn && \ ^ ... | --- missing