Combine new RUN commands into one RUN command.

test/utils/docker/centos6/Dockerfile

@@ -35,11 +35,11 @@ RUN /bin/sed -i -e 's/^\(Defaults\s*requiretty\)/#--- \1/'  /etc/sudoers
 RUN mkdir /etc/ansible/
 RUN /bin/echo -e '[local]\nlocalhost ansible_connection=local' > /etc/ansible/hosts
 #VOLUME /sys/fs/cgroup /run /tmp
-RUN ssh-keygen -q -t rsa1 -N '' -f /etc/ssh/ssh_host_key
-RUN ssh-keygen -q -t dsa -N '' -f /etc/ssh/ssh_host_dsa_key
-RUN ssh-keygen -q -t rsa -N '' -f /etc/ssh/ssh_host_rsa_key
-RUN ssh-keygen -q -t rsa -N '' -f /root/.ssh/id_rsa
-RUN cp /root/.ssh/id_rsa.pub /root/.ssh/authorized_keys
-RUN for key in /etc/ssh/ssh_host_*_key.pub; do echo "localhost $(cat ${key})" >> /root/.ssh/known_hosts; done
+RUN ssh-keygen -q -t rsa1 -N '' -f /etc/ssh/ssh_host_key && \
+    ssh-keygen -q -t dsa -N '' -f /etc/ssh/ssh_host_dsa_key && \
+    ssh-keygen -q -t rsa -N '' -f /etc/ssh/ssh_host_rsa_key && \
+    ssh-keygen -q -t rsa -N '' -f /root/.ssh/id_rsa && \
+    cp /root/.ssh/id_rsa.pub /root/.ssh/authorized_keys && \
+    for key in /etc/ssh/ssh_host_*_key.pub; do echo "localhost $(cat ${key})" >> /root/.ssh/known_hosts; done
 ENV container=docker
 CMD ["/sbin/init"]

test/utils/docker/centos7/Dockerfile

@@ -40,11 +40,11 @@ RUN /usr/bin/sed -i -e 's/^\(Defaults\s*requiretty\)/#--- \1/'  /etc/sudoers
 RUN mkdir /etc/ansible/
 RUN /usr/bin/echo -e '[local]\nlocalhost ansible_connection=local' > /etc/ansible/hosts
 VOLUME /sys/fs/cgroup /run /tmp
-RUN ssh-keygen -q -t rsa1 -N '' -f /etc/ssh/ssh_host_key
-RUN ssh-keygen -q -t dsa -N '' -f /etc/ssh/ssh_host_dsa_key
-RUN ssh-keygen -q -t rsa -N '' -f /etc/ssh/ssh_host_rsa_key
-RUN ssh-keygen -q -t rsa -N '' -f /root/.ssh/id_rsa
-RUN cp /root/.ssh/id_rsa.pub /root/.ssh/authorized_keys
-RUN for key in /etc/ssh/ssh_host_*_key.pub; do echo "localhost $(cat ${key})" >> /root/.ssh/known_hosts; done
+RUN ssh-keygen -q -t rsa1 -N '' -f /etc/ssh/ssh_host_key && \
+    ssh-keygen -q -t dsa -N '' -f /etc/ssh/ssh_host_dsa_key && \
+    ssh-keygen -q -t rsa -N '' -f /etc/ssh/ssh_host_rsa_key && \
+    ssh-keygen -q -t rsa -N '' -f /root/.ssh/id_rsa && \
+    cp /root/.ssh/id_rsa.pub /root/.ssh/authorized_keys && \
+    for key in /etc/ssh/ssh_host_*_key.pub; do echo "localhost $(cat ${key})" >> /root/.ssh/known_hosts; done
 ENV container=docker
 CMD ["/usr/sbin/init"]

test/utils/docker/fedora-rawhide/Dockerfile

@@ -45,10 +45,10 @@ RUN /usr/bin/sed -i -e 's/^\(Defaults\s*requiretty\)/#--- \1/'  /etc/sudoers
 RUN mkdir /etc/ansible/
 RUN /usr/bin/echo -e '[local]\nlocalhost ansible_connection=local' > /etc/ansible/hosts
 VOLUME /sys/fs/cgroup /run /tmp
-RUN ssh-keygen -q -t dsa -N '' -f /etc/ssh/ssh_host_dsa_key
-RUN ssh-keygen -q -t rsa -N '' -f /etc/ssh/ssh_host_rsa_key
-RUN ssh-keygen -q -t rsa -N '' -f /root/.ssh/id_rsa
-RUN cp /root/.ssh/id_rsa.pub /root/.ssh/authorized_keys
-RUN for key in /etc/ssh/ssh_host_*_key.pub; do echo "localhost $(cat ${key})" >> /root/.ssh/known_hosts; done
+RUN ssh-keygen -q -t dsa -N '' -f /etc/ssh/ssh_host_dsa_key && \
+    ssh-keygen -q -t rsa -N '' -f /etc/ssh/ssh_host_rsa_key && \
+    ssh-keygen -q -t rsa -N '' -f /root/.ssh/id_rsa && \
+    cp /root/.ssh/id_rsa.pub /root/.ssh/authorized_keys && \
+    for key in /etc/ssh/ssh_host_*_key.pub; do echo "localhost $(cat ${key})" >> /root/.ssh/known_hosts; done
 ENV container=docker
 CMD ["/usr/sbin/init"]

test/utils/docker/fedora23/Dockerfile

@@ -46,10 +46,10 @@ RUN /usr/bin/sed -i -e 's/^\(Defaults\s*requiretty\)/#--- \1/'  /etc/sudoers
 RUN mkdir /etc/ansible/
 RUN /usr/bin/echo -e '[local]\nlocalhost ansible_connection=local' > /etc/ansible/hosts
 VOLUME /sys/fs/cgroup /run /tmp
-RUN ssh-keygen -q -t dsa -N '' -f /etc/ssh/ssh_host_dsa_key
-RUN ssh-keygen -q -t rsa -N '' -f /etc/ssh/ssh_host_rsa_key
-RUN ssh-keygen -q -t rsa -N '' -f /root/.ssh/id_rsa
-RUN cp /root/.ssh/id_rsa.pub /root/.ssh/authorized_keys
-RUN for key in /etc/ssh/ssh_host_*_key.pub; do echo "localhost $(cat ${key})" >> /root/.ssh/known_hosts; done
+RUN ssh-keygen -q -t dsa -N '' -f /etc/ssh/ssh_host_dsa_key && \
+    ssh-keygen -q -t rsa -N '' -f /etc/ssh/ssh_host_rsa_key && \
+    ssh-keygen -q -t rsa -N '' -f /root/.ssh/id_rsa && \
+    cp /root/.ssh/id_rsa.pub /root/.ssh/authorized_keys && \
+    for key in /etc/ssh/ssh_host_*_key.pub; do echo "localhost $(cat ${key})" >> /root/.ssh/known_hosts; done
 ENV container=docker
 CMD ["/usr/sbin/init"]

test/utils/docker/ubuntu1204/Dockerfile

@@ -62,8 +62,8 @@ RUN /bin/sed -i -e 's/^\(Defaults\s*requiretty\)/#--- \1/'  /etc/sudoers
 RUN mkdir /etc/ansible/
 RUN /bin/echo -e "[local]\nlocalhost ansible_connection=local" > /etc/ansible/hosts
 RUN locale-gen en_US.UTF-8
-RUN ssh-keygen -q -t rsa -N '' -f /root/.ssh/id_rsa
-RUN cp /root/.ssh/id_rsa.pub /root/.ssh/authorized_keys
-RUN for key in /etc/ssh/ssh_host_*_key.pub; do echo "localhost $(cat ${key})" >> /root/.ssh/known_hosts; done
+RUN ssh-keygen -q -t rsa -N '' -f /root/.ssh/id_rsa && \
+    cp /root/.ssh/id_rsa.pub /root/.ssh/authorized_keys && \
+    for key in /etc/ssh/ssh_host_*_key.pub; do echo "localhost $(cat ${key})" >> /root/.ssh/known_hosts; done
 ENV container docker
 CMD ["/sbin/init"]

test/utils/docker/ubuntu1404/Dockerfile

@@ -59,8 +59,8 @@ RUN /bin/sed -i -e 's/^\(Defaults\s*requiretty\)/#--- \1/'  /etc/sudoers
 RUN mkdir /etc/ansible/
 RUN /bin/echo -e "[local]\nlocalhost ansible_connection=local" > /etc/ansible/hosts
 RUN locale-gen en_US.UTF-8
-RUN ssh-keygen -q -t rsa -N '' -f /root/.ssh/id_rsa
-RUN cp /root/.ssh/id_rsa.pub /root/.ssh/authorized_keys
-RUN for key in /etc/ssh/ssh_host_*_key.pub; do echo "localhost $(cat ${key})" >> /root/.ssh/known_hosts; done
+RUN ssh-keygen -q -t rsa -N '' -f /root/.ssh/id_rsa && \
+    cp /root/.ssh/id_rsa.pub /root/.ssh/authorized_keys && \
+    for key in /etc/ssh/ssh_host_*_key.pub; do echo "localhost $(cat ${key})" >> /root/.ssh/known_hosts; done
 ENV container docker
 CMD ["/sbin/init"]