apt 也没法安装.
     1 
                    
                    edis0n0      2022-10-23 15:45:22 +08:00 
                    
                    sudo apt update && sudo apt install -y ufw 
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     2 
                    
                    Cify   OP @edis0n0 早就试过了. 
                0% [Working]E: Package 'ufw' has no installation candidate Ign:1 cdrom://[Debian GNU/Linux 11.5.0 _Bullseye_ - Official amd64 DVD Binary-1 20220910-10:40] bullseye InRelease Err:2 cdrom://[Debian GNU/Linux 11.5.0 _Bullseye_ - Official amd64 DVD Binary-1 20220910-10:40] bullseye Release Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs Hit:3 https://download.docker.com/linux/debian bullseye InRelease Get:4 http://security.debian.org/debian-security bullseye-security InRelease [48.4 kB] Get:5 http://security.debian.org/debian-security bullseye-security/main Sources [166 kB] Get:6 http://security.debian.org/debian-security bullseye-security/main amd64 Packages [191 kB] Reading package lists... Done E: The repository 'cdrom://[Debian GNU/Linux 11.5.0 _Bullseye_ - Official amd64 DVD Binary-1 20220910-10:40] bullseye 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.  | 
            
     3 
                    
                    hingle      2022-10-23 16:12:49 +08:00 
                    
                    
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     4 
                    
                    edis0n0      2022-10-23 16:17:34 +08:00 
                    
                    @hingle #3 不建议用 tuna 这些教育网源,很不稳定,不是连不上就动不动 10kb/s 商业云的源相比之下要稳定不少,就是同步慢 
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     8 
                    
                    Aixiaoa      2022-10-23 16:46:30 +08:00 via iPhone 
                    
                    把源全部注释。全换国内的。 
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     10 
                    
                    adoal      2022-10-23 17:13:57 +08:00 
                    
                    你 source.list 里的源地址: 
                1. 不存在的 CDROM 2. 是 Docker ,不是 Debian 3. 是 Debian security updates ,不是主仓库 当然没有主仓库里的大多数包了。  | 
            
     12 
                    
                    fuckaholic      2022-10-24 09:38:41 +08:00    @Cify 这样很容易让帮助者却步 
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