Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: libcurl4 The following NEW packages will be installed: curl The following packages will be upgraded: libcurl4 1 upgraded, 1 newly installed, 0 to remove and 218 not upgraded. Need to get 572 kB of archives. After this operation, 406 kB of additional disk space will be used. Do you want to continue? [Y/n] Y Err:1 http://mirrors.ustc.edu.cn/debian buster/main arm64 libcurl4 arm64 7.64.0-4+deb10u1 404 Not Found [IP: 218.104.71.170 80] Err:2 http://mirrors.ustc.edu.cn/debian buster/main arm64 curl arm64 7.64.0-4+deb10u1 404 Not Found [IP: 218.104.71.170 80] E: Failed to fetch http://mirrors.ustc.edu.cn/debian/pool/main/c/curl/libcurl4_7.64.0-4+deb10u1_arm64.deb 404 Not Found [IP: 218.104.71.170 80] E: Failed to fetch http://mirrors.ustc.edu.cn/debian/pool/main/c/curl/curl_7.64.0-4+deb10u1_arm64.deb 404 Not Found [IP: 218.104.71.170 80] E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? 这个问题

是由于无法找到所需的软件包而导致的。可能是由于软件包源无法访问或者软件包源中没有所需的软件包。

解决这个问题的方法有两种：
1. 运行 `apt-get update` 命令来更新软件包源列表，然后再次尝试安装。
2. 更换软件包源为可用的源，例如使用默认的官方源或其他可用的镜像源。

你可以尝试使用以下命令进行更新和安装：

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install curl

如果问题仍然存在，请检查你的网络连接以确保可以正常访问软件包源，或者尝试更换软件包源。

相关问题

Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package netstat zhangweideiPhone:~ root# apt-get install netstat Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package netstat

如果在使用上述命令进行安装时出现 "Unable to locate package netstat" 的错误提示，可能是因为你的软件源没有包含 `netstat` 命令的安装包。

你需要先更新软件源，方法是运行以下命令：

apt-get update

这将更新软件包列表。然后再运行以下命令安装 `netstat` 命令：

apt-get install net-tools

请注意，上述命令安装的是 `net-tools` 软件包，其中包含了 `netstat` 命令。安装完成后，你可以使用 `netstat` 命令来查看网络连接状态。

Reading package lists... Done Building dependency tree... Done Reading state information... Done E: Unable to locate package yum

The error message you're encountering is from a Linux package manager, typically APT (Advanced Package Tool) which is used by Ubuntu and its derivatives, while `yum` is commonly associated with the RPM (Red Hat Package Manager) system found in CentOS, Fedora, or RHEL. The error "E: Unable to locate package yum" indicates that the system is looking for a package called `yum`, but it can't find it in the repository.

Here's what's happening:
- `Reading package lists... Done` means APT is gathering information about available packages.
- `Building dependency tree... Done` follows by constructing the list of dependencies for the requested package(s).
- `Reading state information... Done` checks if the necessary packages are installed or if there are any issues.

The problem arises because `yum` is not a package managed by APT; it's a separate package manager used mainly on Red Hat-based systems. To resolve this issue on an Ubuntu system:

1. **Identify the appropriate package manager:** Since you're using APT, you need to install software through it, not `yum`.
2. **Install missing package (if applicable):** If you're trying to install something that should be installed via APT, make sure you're using apt-get or apt instead.
3. **Update the repositories:** Run `sudo apt update` to ensure your package list is up-to-date.
4. **Install a Red Hat package manager (optional):** If you actually need `yum`, consider installing `apt-transport-https` and `epel-release` for accessing the Extra Packages for Enterprise Linux (EPEL) repository, which may have `yum`. Then use `sudo apt install yum` or `sudo yum install yum`.