fzf › CITP › jcifs › unix › totalcommander › InstallingARootCertificateOnUbuntu
sudo mkdir /usr/share/ca-certificates/extra sudo cp SOME.crt /usr/share/ca-certificates/extra/ sudo dpkg-reconfigure ca-certificates
if .pem case
openssl x509 -in SOME.pem -inform PEM -out SOME.crt