sudo apt-get update sudo apt-get upgrade是干什么的

这是Linux系统下的命令，用于更新系统。具体来说：

- `sudo`命令用于以超级用户(root)身份执行命令；
- `apt-get update`命令用于更新可用的软件包列表信息；
- `apt-get upgrade`命令用于升级已安装的软件包到最新版本。

综合起来，这个命令可以帮助用户更新系统，并保持软件包最新。

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sudo apt-get update sudo apt-get upgrade

sudo apt-get update用于更新软件源列表，它会访问源列表中的每个网址，并将最新的软件列表保存在本地电脑。而sudo apt-get upgrade命令用于将本地已安装的软件与软件列表中对应的软件进行对比，如果发现已安装的软件版本较低，就会提示你进行更新。通过这两个命令，你可以保持系统软件的最新状态，并获取最新的功能和修复。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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sudo apt-get updatesudo apt-get upgrade

As an AI language model, I don't have the ability to execute commands like a computer. But here's what these commands do:

- `sudo` is a command that lets you run other commands as a superuser or administrator.
- `apt-get` is a command-line tool used for package management in Ubuntu and other Debian-based Linux distributions.
- `update` updates the package list from the repositories to get the latest version information of packages.
- `upgrade` upgrades all installed packages to their latest versions.

So, when you run `sudo apt-get update`, you update the list of packages available in the repositories, and when you run `sudo apt-get upgrade`, you upgrade all installed packages to their latest versions.