دبیان نصب کردم نه میشه آپدیت کرد نه میشه برنامه نصب کرد :
Failed to fetch http://security.debian.org/debian-security/dists/bullseye-security/InRelease Connection failed
آینه هم عوض کردم ولی نشد
خروجی /etc/apt/sources.list :
# deb cdrom:[Debian GNU/Linux 11.6.0 _Bullseye_ - Unofficial amd64 NETINST with firmware 20221217-10:45]/ bullseye contrib main non-free
#deb cdrom:[Debian GNU/Linux 11.6.0 _Bullseye_ - Unofficial amd64 NETINST with firmware 20221217-10:45]/ bullseye contrib main non-free
##deb http://mirrors.pardisco.co/debian/ bullseye main non-free contrib
##deb-src http://mirrors.pardisco.co/debian/ bullseye main non-free contrib
deb http://ftp.dk.debian.org/debian/ bullseye main non-free contrib
deb-src http://ftp.dk.debian.org/debian/ bullseye main non-free contrib
deb http://security.debian.org/debian-security bullseye-security main contrib non-free
deb-src http://security.debian.org/debian-security bullseye-security main contrib non-free
#bullseye-updates, to get updates before a point release is made;
# see https://www.debian.org/doc/manuals/debian-reference/ch02.en.html#_updates_and_backports
deb http://mirrors.pardisco.co/debian/ bullseye-updates main contrib non-free
deb-src http://mirrors.pardisco.co/debian/ bullseye-updates main contrib non-fre
سوال دومم اینه که چه جوری میشه به نسخه آزمون ارتقا بدم ؟