When you first start kali machine may not take any fail or error about update and upgrade. If you have follow instructions.
1- Check your network connection.Make sure whether connected “Nat network” or not.
2- Open terminal and write this command “leafpad etc/apt/sources.list”. It may not work because you are not empty directory. if you do “cd ..” twice or more it depends what directory are you in ,it will work.
Your sources.list more likely is not like that. If you noticed “#” means comment statement. This is why copy last two lines any paste your sources.list.
#
# deb cdrom:[Debian GNU/Linux 2019.3 _Kali-rolling_ - Official Snapshot amd64 LIVE/INSTALL Binary 20190827-10:52]/ kali-last-snapshot contrib main non-free
#deb cdrom:[Debian GNU/Linux 2019.3 _Kali-rolling_ - Official Snapshot amd64 LIVE/INSTALL Binary 20190827-10:52]/ kali-last-snapshot contrib main non-free
# This system was installed using small removable media
# (e.g. netinst, live or single CD). The matching "deb cdrom"
# entries were disabled at the end of the installation process.
# For information about how to configure apt package sources,
# see the sources.list(5) manual.
deb http://http.kali.org/kali kali-rolling main non-free contrib
deb-src http://http.kali.org/kali kali-rolling main non-free contribDo not forget when complete your work , press the button “ctrl+s”
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