┌──(irir㉿IRIR)-[~]
└─$ sudo apt update
[sudo] password for irir:
Get:1 Index of /kali/ kali-last-snapshot InRelease [41.5 kB]
Err:1 Index of /kali/ kali-last-snapshot InRelease
Sub-process /usr/bin/sqv returned an error code (1), error message is: Missing key 827C8569F2518CC677FECA1AED65462EC8D5E4C5, which is needed to verify signature.
Warning: GPG error: Index of /kali/ kali-last-snapshot InRelease: Sub-process /usr/bin/sqv returned an error code (1), error message is: Missing key 827C8569F2518CC677FECA1AED65462EC8D5E4C5, which is needed to verify signature.
Error: The repository ‘Index of / kali-last-snapshot InRelease’ is not signed.
Notice: Updating from such a repository can’t be done securely, and is therefore disabled by default.
Notice: See apt-secure(8) manpage for repository creation and user configuration details.
There is a blog post about it A New Kali Linux Archive Signing Key | Kali Linux Blog you have to manually import a new key
sudo wget https://archive.kali.org/archive-keyring.gpg -O /usr/share/keyrings/kali-archive-keyring.gpg
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thanks it works perfectly now