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ubuntu---update和upgrate的区别

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1.sudo gedit /etc/apt/sources.list

源列表里面放置的一行行网址,在这个文件里加入或者注释(加#)掉一些源后,保存则源列表里指向的软件就会增加或减少一部分。

2. sudo apt-get update

这个命令,会访问源列表里的每个网址,并读取软件列表,然后保存在本地电脑。软件包管理器里看到的软件列表,都是通过update命令更新的。

3. sudo apt-get upgrate

这个命令,对比源列表网址应用版本和本地应用版本。如果源列表中更新,则更新本地版本。

@https://www.cnblogs.com/lixiangfu/p/11220493.html

如果遇到:sudo apt-get update 更新很慢的时候,可以修改sources.list 中的源。

例如,阿里源的网址:@https://developer.aliyun.com/mirror/ubuntu

图形界面配置

新手推荐使用图形界面配置: 系统设置 -> 软件和更新 选择下载服务器 -> "mirrors.aliyun.com"

手动更改

用你熟悉的编辑器打开:

/etc/apt/sources.list

替换默认的

http://archive.ubuntu.com/

mirrors.aliyun.com

以Ubuntu 14.04.5 LTS为例,最后的效果如下:

deb https://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ trusty main restricted universe multiverse
deb https://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ trusty-security main restricted universe multiverse

deb https://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ trusty-updates main restricted universe multiverse

deb https://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ trusty-backports main restricted universe multiverse

## Not recommended
# deb https://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse
# deb-src https://mirrors.aliyun.com/ubuntu/ trusty-proposed main restricted universe multiverse

ubuntu 16.04 配置如下

deb http://mirrors.aliyun.com/ubuntu/ xenial main
deb-src http://mirrors.aliyun.com/ubuntu/ xenial main

deb http://mirrors.aliyun.com/ubuntu/ xenial-updates main
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main

deb http://mirrors.aliyun.com/ubuntu/ xenial universe
deb-src http://mirrors.aliyun.com/ubuntu/ xenial universe
deb http://mirrors.aliyun.com/ubuntu/ xenial-updates universe
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates universe

deb http://mirrors.aliyun.com/ubuntu/ xenial-security main
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main
deb http://mirrors.aliyun.com/ubuntu/ xenial-security universe
deb-src http://mirrors.aliyun.com/ubuntu/ xenial-security universe

ubuntu 18.04(bionic) 配置如下

deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe mul
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