Alterar nome visível do sistema operacional

Question

Eu tenho uma instalação do Linux Mint 18.3 que eu modifiquei bastante. Eu estou querendo mudar o nome desta instalação para uma pessoa normal, não é o Linux Mint, mas alguma outra distro estranha (razões de causa).

Alterei /etc/lsb-release , /etc/os-release e /etc/upstream-release/lsb-release all para refletir o nome que desejo. No entanto, este é o resultado que estou recebendo:

ComovocêpodeveremBaseSystemtem"Eleftheria 3.0 Meteor" (o nome que eu estou usando), mas no topo ele ainda diz Ubuntu.

Eu quero mudá-lo para que o usuário veja um sistema operacional diferente, mas o sistema ainda o reconhece como Linux Mint / Ubuntu, então eu não tenho problemas com aplicativos e quais não.

Isso é tudo que eu posso fazer? Ou posso modificar outra coisa para refletir o nome desejado?

Obrigado!

EDITAR

Saída de sudo grep -wi ubuntu /etc/* :

grep: /etc/acpi: Is a directory
grep: /etc/alternatives: Is a directory
grep: /etc/apm: Is a directory
grep: /etc/apparmor: Is a directory
grep: /etc/apparmor.d: Is a directory
grep: /etc/apport: Is a directory
grep: /etc/apt: Is a directory
grep: /etc/at-spi2: Is a directory
grep: /etc/avahi: Is a directory
grep: /etc/bash_completion.d: Is a directory
grep: /etc/binfmt.d: Is a directory
grep: /etc/bluetooth: Is a directory
grep: /etc/brltty: Is a directory
grep: /etc/ca-certificates: Is a directory
grep: /etc/calendar: Is a directory
/etc/casper.conf:export BUILD_SYSTEM="Ubuntu"
grep: /etc/chatscripts: Is a directory
grep: /etc/chromium-browser: Is a directory
grep: /etc/cinnamon: Is a directory
grep: /etc/clamav: Is a directory
grep: /etc/ConsoleKit: Is a directory
grep: /etc/console-setup: Is a directory
grep: /etc/cracklib: Is a directory
grep: /etc/cron.d: Is a directory
grep: /etc/cron.daily: Is a directory
grep: /etc/cron.hourly: Is a directory
grep: /etc/cron.monthly: Is a directory
grep: /etc/cron.weekly: Is a directory
grep: /etc/cups: Is a directory
grep: /etc/cupshelpers: Is a directory
grep: /etc/dbus-1: Is a directory
grep: /etc/default: Is a directory
grep: /etc/depmod.d: Is a directory
grep: /etc/dhcp: Is a directory
grep: /etc/dictionaries-common: Is a directory
grep: /etc/dkms: Is a directory
grep: /etc/dnsmasq.d: Is a directory
grep: /etc/doc-base: Is a directory
grep: /etc/dpkg: Is a directory
grep: /etc/emacs: Is a directory
grep: /etc/esound: Is a directory
grep: /etc/firefox: Is a directory
grep: /etc/fonts: Is a directory
grep: /etc/gconf: Is a directory
grep: /etc/gdb: Is a directory
grep: /etc/gdm3: Is a directory
grep: /etc/ghostscript: Is a directory
grep: /etc/gimp: Is a directory
grep: /etc/gnome: Is a directory
grep: /etc/gnome-app-install: Is a directory
grep: /etc/gnome-vfs-2.0: Is a directory
grep: /etc/groff: Is a directory
grep: /etc/grub.d: Is a directory
grep: /etc/gss: Is a directory
grep: /etc/gtk-2.0: Is a directory
grep: /etc/gtk-3.0: Is a directory
grep: /etc/guest-session: Is a directory
grep: /etc/gufw: Is a directory
grep: /etc/hp: Is a directory
grep: /etc/ifplugd: Is a directory
grep: /etc/ImageMagick-6: Is a directory
grep: /etc/init: Is a directory
grep: /etc/init.d: Is a directory
grep: /etc/initramfs-tools: Is a directory
grep: /etc/insserv: Is a directory
grep: /etc/insserv.conf.d: Is a directory
grep: /etc/iproute2: Is a directory
grep: /etc/kbd: Is a directory
grep: /etc/kernel: Is a directory
grep: /etc/ldap: Is a directory
grep: /etc/ld.so.conf.d: Is a directory
grep: /etc/libnl-3: Is a directory
grep: /etc/libpaper.d: Is a directory
grep: /etc/libreoffice: Is a directory
grep: /etc/lightdm: Is a directory
grep: /etc/linuxmint: Is a directory
grep: /etc/logcheck: Is a directory
grep: /etc/logrotate.d: Is a directory
grep: /etc/lvm: Is a directory
grep: /etc/menu-methods: Is a directory
grep: /etc/modprobe.d: Is a directory
grep: /etc/modules-load.d: Is a directory
grep: /etc/mono: Is a directory
grep: /etc/network: Is a directory
grep: /etc/NetworkManager: Is a directory
grep: /etc/newt: Is a directory
/etc/ntp.conf:# Use servers from the NTP Pool Project. Approved by Ubuntu Technical Board
/etc/ntp.conf:pool 0.ubuntu.pool.ntp.org iburst
/etc/ntp.conf:pool 1.ubuntu.pool.ntp.org iburst
/etc/ntp.conf:pool 2.ubuntu.pool.ntp.org iburst
/etc/ntp.conf:pool 3.ubuntu.pool.ntp.org iburst
/etc/ntp.conf:# Use Ubuntu's ntp server as a fallback.
/etc/ntp.conf:pool ntp.ubuntu.com
grep: /etc/obex-data-server: Is a directory
grep: /etc/openal: Is a directory
grep: /etc/openvpn: Is a directory
grep: /etc/opt: Is a directory
/etc/os-release:ID_LIKE=ubuntu
grep: /etc/pam.d: Is a directory
grep: /etc/pcmcia: Is a directory
grep: /etc/perl: Is a directory
grep: /etc/pki: Is a directory
grep: /etc/pm: Is a directory
grep: /etc/polkit-1: Is a directory
grep: /etc/ppp: Is a directory
grep: /etc/profile.d: Is a directory
grep: /etc/pulse: Is a directory
grep: /etc/purple: Is a directory
grep: /etc/python: Is a directory
grep: /etc/python2.7: Is a directory
grep: /etc/python3: Is a directory
grep: /etc/python3.5: Is a directory
grep: /etc/rc0.d: Is a directory
grep: /etc/rc1.d: Is a directory
grep: /etc/rc2.d: Is a directory
grep: /etc/rc3.d: Is a directory
grep: /etc/rc4.d: Is a directory
grep: /etc/rc5.d: Is a directory
grep: /etc/rc6.d: Is a directory
grep: /etc/rcS.d: Is a directory
grep: /etc/request-key.d: Is a directory
grep: /etc/resolvconf: Is a directory
grep: /etc/rsyslog.d: Is a directory
grep: /etc/samba: Is a directory
grep: /etc/sane.d: Is a directory
grep: /etc/security: Is a directory
grep: /etc/selinux: Is a directory
grep: /etc/sensors.d: Is a directory
grep: /etc/sgml: Is a directory
grep: /etc/signon-ui: Is a directory
grep: /etc/skel: Is a directory
grep: /etc/speech-dispatcher: Is a directory
grep: /etc/ssh: Is a directory
grep: /etc/ssl: Is a directory
grep: /etc/sudoers.d: Is a directory
grep: /etc/sysctl.d: Is a directory
grep: /etc/systemd: Is a directory
grep: /etc/terminfo: Is a directory
grep: /etc/thermald: Is a directory
grep: /etc/tmpfiles.d: Is a directory
grep: /etc/udev: Is a directory
grep: /etc/udisks2: Is a directory
grep: /etc/ufw: Is a directory
grep: /etc/update-motd.d: Is a directory
grep: /etc/UPower: Is a directory
/etc/upstart-xsessions:ubuntu
grep: /etc/upstream-release: Is a directory
grep: /etc/usb_modeswitch.d: Is a directory
grep: /etc/vbox: Is a directory
grep: /etc/vim: Is a directory
grep: /etc/wildmidi: Is a directory
grep: /etc/wpa_supplicant: Is a directory
grep: /etc/X11: Is a directory
grep: /etc/xdg: Is a directory
grep: /etc/xml: Is a directory 

EDITAR

Conteúdo de /etc/os-release :

Eu deixei as coisas que senti danificariam a funcionalidade do sistema se fossem alteradas.

EDITAR

Saída de find /usr/share/ -type f -iname \*ubuntu\*png

/usr/share/linuxmint/mintinstall/icons/ubuntu-tweak.png
/usr/share/linuxmint/mintinstall/icons/ubuntuone.png
/usr/share/linuxmint/mintinstall/icons/firefox-ubuntu-it-menu.png
/usr/share/linuxmint/mintinstall/icons/edubuntu.png
/usr/share/linuxmint/mintinstall/installed/ubuntu-tweak.png
/usr/share/linuxmint/mintinstall/installed/ubuntuone.png
/usr/share/linuxmint/mintinstall/installed/firefox-ubuntu-it-menu.png
/usr/share/linuxmint/mintinstall/installed/edubuntu.png
/usr/share/app-install/icons/_usr_share_cordova-ubuntu-tests_cordovaqt64.png
/usr/share/app-install/icons/lubuntu-software-center.png
/usr/share/app-install/icons/ubuntu-qtcreator.png
/usr/share/app-install/icons/ubuntustudio-controls.png
/usr/share/app-install/icons/ubuntu-online-tour.png
/usr/share/app-install/icons/firefox-ubuntu-it-menu.png
/usr/share/app-install/icons/edubuntu.png
/usr/share/app-install/icons/_usr_share_cordova-ubuntu-2.8_examples_qrcode-scanner_img_qrcode.png
/usr/share/app-install/icons/_usr_share_ubuntu_settings_system_system-settings.png
/usr/share/app-install/icons/ubuntustudio-logo.png
/usr/share/icons/Mint-X/status/22/ubuntuone-client-offline.png
/usr/share/icons/Mint-X/status/22/ubuntuone-client-updating.png
/usr/share/icons/Mint-X/status/22/ubuntuone-client-idle.png
/usr/share/icons/Mint-X/status/22/ubuntuone-client-error.png
/usr/share/icons/Mint-X/status/24/ubuntuone-client-offline.png
/usr/share/icons/Mint-X/status/24/ubuntuone-client-updating.png
/usr/share/icons/Mint-X/status/24/ubuntuone-client-idle.png
/usr/share/icons/Mint-X/status/24/ubuntuone-client-error.png
/usr/share/icons/Mint-X/apps/22/ubuntu-tweak.png
/usr/share/icons/Mint-X/apps/22/ubuntuone.png
/usr/share/icons/Mint-X/apps/22/softwarecenter-ubuntu.png
/usr/share/icons/Mint-X/apps/16/ubuntu-tweak.png
/usr/share/icons/Mint-X/apps/16/ubuntuone.png
/usr/share/icons/Mint-X/apps/16/softwarecenter-ubuntu.png
/usr/share/icons/Mint-X/apps/48/ubuntu-tweak.png
/usr/share/icons/Mint-X/apps/48/ubuntuone.png
/usr/share/icons/Mint-X/apps/48/softwarecenter-ubuntu.png
/usr/share/icons/Mint-X/apps/32/ubuntu-tweak.png
/usr/share/icons/Mint-X/apps/32/ubuntuone.png
/usr/share/icons/Mint-X/apps/32/softwarecenter-ubuntu.png
/usr/share/icons/Mint-X/apps/24/ubuntu-tweak.png
/usr/share/icons/Mint-X/apps/24/ubuntuone.png
/usr/share/icons/Mint-X/apps/24/softwarecenter-ubuntu.png
/usr/share/icons/Mint-X/emblems/22/emblem-ubuntuone-synchronized.png
/usr/share/icons/Mint-X/emblems/22/emblem-ubuntuone-updating.png
/usr/share/icons/Mint-X/emblems/22/emblem-ubuntuone-unsynchronized.png
/usr/share/icons/Mint-X/emblems/16/emblem-ubuntuone-synchronized.png
/usr/share/icons/Mint-X/emblems/16/emblem-ubuntuone-updating.png
/usr/share/icons/Mint-X/emblems/16/emblem-ubuntuone-unsynchronized.png
/usr/share/icons/Mint-X/emblems/48/emblem-ubuntuone-synchronized.png
/usr/share/icons/Mint-X/emblems/48/emblem-ubuntuone-updating.png
/usr/share/icons/Mint-X/emblems/48/emblem-ubuntuone-unsynchronized.png
/usr/share/icons/Mint-X/emblems/32/emblem-ubuntuone-synchronized.png
/usr/share/icons/Mint-X/emblems/32/emblem-ubuntuone-updating.png
/usr/share/icons/Mint-X/emblems/32/emblem-ubuntuone-unsynchronized.png
/usr/share/icons/Mint-X/emblems/24/emblem-ubuntuone-synchronized.png
/usr/share/icons/Mint-X/emblems/24/emblem-ubuntuone-updating.png
/usr/share/icons/Mint-X/emblems/24/emblem-ubuntuone-unsynchronized.png
/usr/share/icons/Mint-X-Dark/status/22/ubuntuone-client-offline.png
/usr/share/icons/Mint-X-Dark/status/22/ubuntuone-client-updating.png
/usr/share/icons/Mint-X-Dark/status/22/ubuntuone-client-idle.png
/usr/share/icons/Mint-X-Dark/status/22/ubuntuone-client-error.png
/usr/share/icons/Mint-X-Dark/status/24/ubuntuone-client-offline.png
/usr/share/icons/Mint-X-Dark/status/24/ubuntuone-client-updating.png
/usr/share/icons/Mint-X-Dark/status/24/ubuntuone-client-idle.png
/usr/share/icons/Mint-X-Dark/status/24/ubuntuone-client-error.png
/usr/share/icons/Mint-X-Dark/places/22/start-here-ubuntu.png
/usr/share/icons/Mint-X-Dark/places/24/start-here-ubuntu.png
/usr/share/icons/gnome/32x32/places/ubuntu-logo.png
/usr/share/icons/gnome/22x22/places/ubuntu-logo.png
/usr/share/icons/gnome/16x16/places/ubuntu-logo.png
/usr/share/icons/gnome/24x24/places/ubuntu-logo.png
/usr/share/icons/hicolor/128x128/apps/ubuntuone-music.png
/usr/share/icons/unity-webapps-applications/apps/64/ubuntuone-music.png
/usr/share/icons/unity-webapps-applications/apps/48/ubuntuone-music.png
/usr/share/icons/unity-webapps-applications/apps/128/ubuntuone-music.png
/usr/share/icons/Mint-Y/apps/22/web-omgubuntu.png
/usr/share/icons/Mint-Y/apps/22/ubuntuone-music.png
/usr/share/icons/Mint-Y/apps/22/ubuntu-tweak.png
/usr/share/icons/Mint-Y/apps/22/ubuntuone.png
/usr/share/icons/Mint-Y/apps/22/ubuntu-sdk.png
/usr/share/icons/Mint-Y/apps/16/web-omgubuntu.png
/usr/share/icons/Mint-Y/apps/16/ubuntuone-music.png
/usr/share/icons/Mint-Y/apps/16/ubuntu-tweak.png
/usr/share/icons/Mint-Y/apps/16/ubuntuone.png
/usr/share/icons/Mint-Y/apps/16/ubuntu-sdk.png
/usr/share/icons/Mint-Y/apps/64/web-omgubuntu.png
/usr/share/icons/Mint-Y/apps/64/ubuntuone-music.png
/usr/share/icons/Mint-Y/apps/64/ubuntu-tweak.png
/usr/share/icons/Mint-Y/apps/64/ubuntuone.png
/usr/share/icons/Mint-Y/apps/64/ubuntu-sdk.png
/usr/share/icons/Mint-Y/apps/48/web-omgubuntu.png
/usr/share/icons/Mint-Y/apps/48/ubuntuone-music.png
/usr/share/icons/Mint-Y/apps/48/ubuntu-tweak.png
/usr/share/icons/Mint-Y/apps/48/ubuntuone.png
/usr/share/icons/Mint-Y/apps/48/ubuntu-sdk.png
/usr/share/icons/Mint-Y/apps/32/web-omgubuntu.png
/usr/share/icons/Mint-Y/apps/32/ubuntuone-music.png
/usr/share/icons/Mint-Y/apps/32/ubuntu-tweak.png
/usr/share/icons/Mint-Y/apps/32/ubuntuone.png
/usr/share/icons/Mint-Y/apps/32/ubuntu-sdk.png
/usr/share/icons/Mint-Y/apps/96/web-omgubuntu.png
/usr/share/icons/Mint-Y/apps/96/ubuntuone-music.png
/usr/share/icons/Mint-Y/apps/96/ubuntu-tweak.png
/usr/share/icons/Mint-Y/apps/96/ubuntuone.png
/usr/share/icons/Mint-Y/apps/96/ubuntu-sdk.png
/usr/share/icons/Mint-Y/apps/256/web-omgubuntu.png
/usr/share/icons/Mint-Y/apps/256/ubuntuone-music.png
/usr/share/icons/Mint-Y/apps/256/ubuntu-tweak.png
/usr/share/icons/Mint-Y/apps/256/ubuntuone.png
/usr/share/icons/Mint-Y/apps/256/ubuntu-sdk.png
/usr/share/icons/Mint-Y/apps/24/web-omgubuntu.png
/usr/share/icons/Mint-Y/apps/24/ubuntuone-music.png
/usr/share/icons/Mint-Y/apps/24/ubuntu-tweak.png
/usr/share/icons/Mint-Y/apps/24/ubuntuone.png
/usr/share/icons/Mint-Y/apps/24/ubuntu-sdk.png
/usr/share/plymouth/ubuntu-logo.png