Linux之Ubuntu无法找到apt-get或apt命令的解决方法_ubuntu没有apt命令

1、若系统安装了aptitude

aptitude show apt-transport-https
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显示如下：

软件包：apt-transport-https      
版本号：1.3~rc2
状态: 未安装
优先级：可选
部分：admin
维护者：APT Development Team <deity@lists.debian.org>
体系：amd64
未压缩尺寸：237 k
依赖于: libapt-pkg5.0 (>= 1.3~rc2), libc6 (>= 2.14), libcurl3-gnutls (>= 7.16.2), libgcc1 (>= 1:3.0), libstdc++6 (>= 5.2)
推荐: ca-certificates
冲突: apt-transport-https:i386
描述：https download transport for APT
 This package enables the usage of 'deb https://foo distro main' lines in the /etc/apt/sources.list so that all package managers using the libapt-pkg library can access metadata and packages available in sources accessible over https
 (Hypertext Transfer Protocol Secure). 
 
 This transport supports server as well as client authentication with certificates.
标签: admin::package-management, protocol::http, protocol::ssl, role::shared-lib, suite::debian, use::downloading
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2、到ubuntu安装包商店下载deb安装包然后手动安装

https://packages.ubuntu.com/  ####64位PC选amd64
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一共需要安装三个deb安装包，安装都需要用dpkg命令

dpkg -i apt-transport-https_1.0.9.8.3_amd64.deb
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apt-transport-https_1.0.9.8.3_amd64.deb
apt_1.6.6ubuntu0.1_amd64.deb
libapt-pkg-dev_1.6.6ubuntu0.1_amd64.deb #若缺少依赖，先解决依赖问题，安装这个依赖包
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3、修复和更新

apt-get install -f
apt-get update
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P.S. aptitude与apt-get可能存在冲突，建议卸载aptitude