Debian 10.x Buster 升级至 Debian 11.x Bullseye

• 更新系统
  
  1	apt update && apt upgrade -y && apt dist-upgrade -y

• 更新sources.list
  
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  #备份旧文件 cp -r /etc/apt/sources.list /etc/apt/sources.list.buster   #替换Buster为Bullseye sed -i 's/buster/bullseye/g' /etc/apt/sources.list !!!Bullseye开始安全更新源从buster/updates变更为bullseye-security这种格式!!! sed -i 's#/updates#-security#g' /etc/apt/sources.list

• 升级系统
  
  1	apt update && apt upgrade -y && apt dist-upgrade -y

• 验证系统版本
  
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  #重启系统 reboot   #查看当前系统版本 root@debian:~# lsb_release -a No LSB modules are available. Distributor ID: Debian Description:    Debian GNU/Linux 11 (bullseye) Release:        11 Codename:       bullseye

• 开启TCP BBR拥塞控制算法
  
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  #写入配置文件 cat >> /etc/sysctl.conf << EOF net.core.default_qdisc = fq net.ipv4.tcp_congestion_control = bbr EOF   #保存生效 root@debian:~# sysctl -p net.core.default_qdisc = fq net.ipv4.tcp_congestion_control = bbr   #验证是否成功开启 root@debian:~# lsmod | grep bbr tcp_bbr                20480  29

备注

• 建议备份好数据再执行升级
• 升级过程中自行选择是否保留旧的配置文件
• 软件版本/CA证书更新可以按 q 跳过查看