centos7 - Docker: transaction check error -

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i trying install docker , following https://get.docker.com/

i on centos7

-bash-4.2$ cd -bash-4.2$ wget -qo- https://get.docker.com/ | sh + sudo -e sh -c 'sleep 3; yum -y -q install docker-engine' transaction check error:   file /usr/lib/systemd/system/blk-availability.service install of device-mapper-7:1.02.107-5.el7_2.5.x86_64 conflicts file package lvm2-7:2.02.105-14.el7.x86_64   file /usr/sbin/blkdeactivate install of device-mapper-7:1.02.107-5.el7_2.5.x86_64 conflicts file package lvm2-7:2.02.105-14.el7.x86_64   file /usr/share/man/man8/blkdeactivate.8.gz install of device-mapper-7:1.02.107-5.el7_2.5.x86_64 conflicts file package lvm2-7:2.02.105-14.el7.x86_64  error summary -------------

anyone know error means , how resolve it?

i've updated with:

sudo yum update

now docker command works now


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