The following message appears when accessing Plesk home page:
Error: Failed to update the ModSecurity rule set: modsecurity_ctl failed: gpg: key 4520AFA9: "Atomicorp (Atomicorp Official Signing Key) <email@example.com>" not changed gpg: Total number processed: 1 gpg: unchanged: 1 gpg: Signature made Fri Jul 3 02:52:57 2015 EEST using RSA key ID 4520AFA9 gpg: Good signature from "Atomicorp (Atomicorp Official Signing Key) <firstname.lastname@example.org>" gpg: WARNING: This key is not certified with a trusted signature! gpg: There is no indication that the signature belongs to the owner. Primary key fingerprint: 1818 66DF 9DAC A40E 5B42 9B08 FFBD 5D0A 4520 AFA9 TERM environment variable not set. One of the configured repositories failed (Unknown), 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. Disable the repository, 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 <repoid> 4. 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=<repoid>.skip_if_unavailable=true Cannot find a valid baseurl for repo: base/7/x86_64 Command '/bin/bash < /tmp/tmp7Iq5sM/aum-plesk-installer' returned non-zero exit status 1 Unable to download tortix rule set
mod_security was not properly enabled after Plesk MU# 52 is installed.
Follow KB article http://kb.plesk.com/en/126028 instructions to enable ModSecurity rule set and fix the issue.