...):
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* FEDORA 23/24 *
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1) su
2) dnf -y install wget
3) rpm --import https://raw.githubusercontent.com/kuboosoft/postinstallerf/master/GPG/$(rpm -E %fedora)/RPM-GPG-KEY-postinstallerf
4) wget -P /etc/yum.repos.d/ https://raw.github.com/kuboosoft/postinstallerf/master/postinstallerf.repo
5) dnf clean all && dnf -y install postinstallerf