Dear chimera users, I have question in yum install of chimeraX. I downloaded a CentOS/RHEL7 chimerax package from https://www.cgl.ucsf.edu/chimerax/download.html, and I tried to install by that command; However, I sawed strange messages like this; Can I get some help? *[root@lsb /]# sudo yum install /home/hpclab/Downloads/ucsf-chimerax-1.2.5-1.el7.x86_64.rpm * Loaded plugins: fastestmirror, langpacks Examining /home/hpclab/Downloads/ucsf-chimerax-1.2.5-1.el7.x86_64.rpm: ucsf-chimerax-1.2.5-1.el7.x86_64 Marking /home/hpclab/Downloads/ucsf-chimerax-1.2.5-1.el7.x86_64.rpm to be installed Resolving Dependencies --> Running transaction check ---> Package ucsf-chimerax.x86_64 0:1.2.5-1.el7 will be installed --> Processing Dependency: libgfortran4 for package: ucsf-chimerax-1.2.5-1.el7.x86_64 Loading mirror speeds from cached hostfile epel/x86_64/metalink | 5.1 kB 00:00 * base: mirror.kakao.com * epel: ftp.riken.jp * extras: mirror.kakao.com * nux-dextop: li.nux.ro * updates: mirror.kakao.com base | 3.6 kB 00:00 extras | 2.9 kB 00:00 http://li.nux.ro/download/nux/dextop/el7/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: li.nux.ro; Unknown error" Trying other mirror. nux-dextop | 2.9 kB 00:00 teamviewer/x86_64/signature | 867 B 00:00 Retrieving key from https://linux.teamviewer.com/pubkey/currentkey.asc Importing GPG key 0x0C1289C0: Userid : "TeamViewer GmbH (TeamViewer Linux 2017) < support@teamviewer.com>" Fingerprint: 8cae 012e bfac 38b1 7a93 7cd8 c5e2 2450 0c12 89c0 From : https://linux.teamviewer.com/pubkey/currentkey.asc *Is this ok [y/N]: N* teamviewer/x86_64/signature | 2.5 kB 02:00 !!! https://linux.teamviewer.com/yum/stable/main/binary-x86_64/repodata/repomd.x...: [Errno -1] Gpg Keys not imported, cannot verify repomd.xml for repo teamviewer Trying other mirror. One of the configured repositories failed (TeamViewer - x86_64), and yum doesn't have enough cached data to continue. At this point the only safe thing yum can do is fail. There are a few ways to work "fix" this: 1. Contact the upstream for the repository and get them to fix the problem. 2. Reconfigure the baseurl/etc. for the repository, to point to a working upstream. This is most often useful if you are using a newer distribution release than is supported by the repository (and the packages for the previous distribution release still work). 3. Run the command with the repository temporarily disabled yum --disablerepo=teamviewer ... 4. Disable the repository permanently, so yum won't use it by default. Yum will then just ignore the repository until you permanently enable it again or use --enablerepo for temporary usage: yum-config-manager --disable teamviewer or subscription-manager repos --disable=teamviewer 5. Configure the failing repository to be skipped, if it is unavailable. Note that yum will try to contact the repo. when it runs most commands, so will have to try and fail each time (and thus. yum will be be much slower). If it is a very temporary problem though, this is often a nice compromise: yum-config-manager --save --setopt=teamviewer.skip_if_unavailable=true failure: repodata/repomd.xml from teamviewer: [Errno 256] No more mirrors to try. https://linux.teamviewer.com/yum/stable/main/binary-x86_64/repodata/repomd.x...: [Errno -1] Gpg Keys not imported, cannot verify repomd.xml for repo teamviewer Best regards Si Hoon Park