Well,i have just intalled an older version of Kali on my pc with dualboot.So I want to use apt-get but i get this error :Thanks for readingCode:Ign:2 http://security.kali.org/kali-security kali/updates InRelease Ign:3 http://http.kali.org/kali kali InRelease Err:4 http://repo.kali.org/kali kali-bleeding-edge InRelease 403 Forbidden Err:5 http://security.kali.org/kali-security kali/updates Release 404 Not Found Err:6 http://http.kali.org/kali kali Release 404 Not Found Get:1 http://kali.mirror.garr.it/mirrors/kali kali-dev InRelease [30.4 kB] Err:1 http://kali.mirror.garr.it/mirrors/kali kali-dev InRelease The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository <devel@kali.org> Reading package lists... Done E: The repository 'http://security.kali.org/kali-security kali/updates Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. E: The repository 'http://http.kali.org/kali kali Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. W: GPG error: http://kali.mirror.garr.it/mirrors/kali kali-dev InRelease: The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository <devel@kali.org> E: The repository 'http://http.kali.org/kali kali-dev InRelease' is not signed. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.
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