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前幾天把一台 Ubuntu 16.04 的主機升級到 18.04，然後這樣升級並沒有比直接安裝好，反而還導致一堆舊套件被卡在原本版本上沒有更新。
就在這個反覆移除->更新的過程中，意外的關聯到 APT 這個套件管理程式的工具，移除後整個有點傻眼，就沒辦法繼續「管理」了ＸＤ
好在這種事肯定不是我第一個發生，方向也大概確認：就是手動把他裝回來吧！
[email protected]:~/apt# wget http://security.ubuntu.com/ubuntu/pool/main/a/apt/apt_1.6.12ubuntu0.2_amd64.deb
Saving to: ‘apt_1.6.12ubuntu0.2_amd64.deb’
apt_1.6.12ubuntu0.2_amd64.deb 100%[=====================================================================================>] 1.15M 809KB/s in 1.5s
[email protected]:~/apt# wget http://security.ubuntu.com/ubuntu/pool/main/a/apt/libapt-pkg5.0_1.6.12ubuntu0.2_amd64.deb
Saving to: ‘libapt-pkg5.0_1.6.12ubuntu0.2_amd64.deb’
libapt-pkg5.0_1.6.12ubuntu0.2_amd64.deb 100%[=====================================================================================>] 787.23K 566KB/s in 1.4s
[email protected]:~/apt# wget http://security.ubuntu.com/ubuntu/pool/main/u/ubuntu-keyring/ubuntu-keyring_2018.02.28_all.deb
Saving to: ‘ubuntu-keyring_2018.02.28_all.deb’
ubuntu-keyring_2018.02.28_all.deb 100%[=====================================================================================>] 20.21K 75.9KB/s in 0.3s
[email protected]:~/apt# dpkg -i ubuntu-keyring_2018.02.28_all.deb
[email protected]:~/apt# dpkg -i libapt-pkg5.0_1.6.12ubuntu0.2_amd64.deb
[email protected]:~/apt# dpkg -i apt_1.6.12ubuntu0.2_amd64.deb
dpkg: regarding apt_1.6.12ubuntu0.2_amd64.deb containing apt:
apt breaks apt-transport-https (<< 1.5~alpha4~)
apt-transport-https (version 1.2.35) is present and installed.
dpkg: error processing archive apt_1.6.12ubuntu0.2_amd64.deb (--install):
installing apt would break apt-transport-https, and
deconfiguration is not permitted (--auto-deconfigure might help)
Errors were encountered while processing:
apt_1.6.12ubuntu0.2_amd64.deb
[email protected]:~/apt# dpkg -r apt-transport-https
dpkg: dependency problems prevent removal of apt-transport-https:
ubuntu-advantage-tools depends on apt-transport-https (>= 1.2.32).
dpkg: error processing package apt-transport-https (--remove):
dependency problems - not removing
Errors were encountered while processing:
apt-transport-https
[email protected]:~/apt# dpkg -r ubuntu-advantage-tools
(Reading database ... 39144 files and directories currently installed.)
Removing ubuntu-advantage-tools (27.8~16.04.1) ...
Processing triggers for man-db (2.8.3-2) ...
[email protected]:~/apt# dpkg -i apt_1.6.12ubuntu0.2_amd64.deb
dpkg: regarding apt_1.6.12ubuntu0.2_amd64.deb containing apt:
apt breaks apt-transport-https (<< 1.5~alpha4~)
apt-transport-https (version 1.2.35) is present and installed.
dpkg: error processing archive apt_1.6.12ubuntu0.2_amd64.deb (--install):
installing apt would break apt-transport-https, and
deconfiguration is not permitted (--auto-deconfigure might help)
Errors were encountered while processing:
apt_1.6.12ubuntu0.2_amd64.deb
[email protected]:~/apt# dpkg -r apt-transport-https
(Reading database ... 39063 files and directories currently installed.)
Removing apt-transport-https (1.2.35) ...
[email protected]:~/apt# dpkg -i apt_1.6.12ubuntu0.2_amd64.deb
dpkg: regarding apt_1.6.12ubuntu0.2_amd64.deb containing apt:
apt breaks apt-utils (<< 1.3~exp2~)
apt-utils (version 1.2.35) is present and installed.
dpkg: error processing archive apt_1.6.12ubuntu0.2_amd64.deb (--install):
installing apt would break apt-utils, and
deconfiguration is not permitted (--auto-deconfigure might help)
Errors were encountered while processing:
apt_1.6.12ubuntu0.2_amd64.deb
[email protected]:~/apt# dpkg -r apt-utils
[email protected]:~/apt# dpkg -i apt_1.6.12ubuntu0.2_amd64.deb
[email protected]:~/apt# apt -v
apt 1.6.12ubuntu0.2 (amd64)上面是我操作的過程，先是抓 apt_1.6.12ubuntu0.2_amd64.deb, libapt-pkg5.0_1.6.12ubuntu0.2_amd64.deb, ubuntu-keyring_2018.02.28_all.deb 這三個檔案下來，然後開始進行安裝。
過程中看到「apt breaks apt-transport-https 」錯誤就移除 apt-transport-https，移除過程中又出現「dpkg: dependency problems prevent removal of apt-transport-https: ubuntu-advantage-tools depends on apt-transport-https」錯誤也是繼續移除 ubuntu-advantage-tools 與 apt-utils，最後輾轉才把 apt_1.6.12ubuntu0.2_amd64.deb 給裝好。
裝好後確認 apt -v 看看版本與執行狀態，有出現 apt 1.6.12ubuntu0.2 就正確拉～