Debian9更換可用軟件源

由于debian9 停止維護，目前可用的軟件源如下：

deb //archive.debian.org/debian/ stretch main contrib non-freedeb-src //archive.debian.org/debian/ stretch main contrib non-freedeb //archive.debian.org/debian-security/ stretch/updates main contrib non-freedeb-src //archive.debian.org/debian-security/ stretch/updates main contrib non-freedeb //archive.debian.org/debian/ stretch-backports main contrib non-free

1.設置軟件源

cat >/etc/apt/sources.list<

2.更新軟件源： apt update -y

3.提示gpg證書錯誤處理

報錯信息：

W: GPG error: //archive.debian.org/debian stretch-backports InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 648ACFD622F3D138 NO_PUBKEY 0E98404D386FA1D9

安裝需要的依賴和軟件：

apt-get install software-properties-common dirmngr -y

添加gpg證書驗證：

apt-key adv --keyserver keyserver.ubuntu.com --recv-keys apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 648ACFD622F3D138 0E98404D386FA1D9

4.再次執行更新軟件源：apt update -y