netstat指令所属工具包：net-tools

apt-get install net-tools

yum install net-tools

国内云服务器基本配的自家源，有时候需要换回官方源。

备份现役源：

sudo cp /etc/apt/sources.list /etc/apt/sources.list_tenxun
修改sources.list配置文件：

sudo vim /etc/apt/sources.list
官方源sources.list文件内容：

deb cdrom:[Ubuntu 20.04 LTS Focal Fossa - Release amd64 (20200423)]/ focal main restricted

See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to

newer versions of the distribution.

deb http://cn.archive.ubuntu.com/ubuntu/ focal main restricted

deb-src http://cn.archive.ubuntu.com/ubuntu/ focal main restricted

Major bug fix updates produced after the final release of the

distribution.

deb http://cn.archive.ubuntu.com/ubuntu/ focal-updates main restricted

deb-src http://cn.archive.ubuntu.com/ubuntu/ focal-updates main restricted

N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu

team. Also, please note that software in universe WILL NOT receive any

review or updates from the Ubuntu security team.

deb http://cn.archive.ubuntu.com/ubuntu/ focal universe

deb-src http://cn.archive.ubuntu.com/ubuntu/ focal universe

deb http://cn.archive.ubuntu.com/ubuntu/ focal-updates universe

deb-src http://cn.archive.ubuntu.com/ubuntu/ focal-updates universe

N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu

team, and may not be under a free licence. Please satisfy yourself as to

your rights to use the software. Also, please note that software in

multiverse WILL NOT receive any review or updates from the Ubuntu

security team.

deb http://cn.archive.ubuntu.com/ubuntu/ focal multiverse

deb-src http://cn.archive.ubuntu.com/ubuntu/ focal multiverse

deb http://cn.archive.ubuntu.com/ubuntu/ focal-updates multiverse

deb-src http://cn.archive.ubuntu.com/ubuntu/ focal-updates multiverse

N.B. software from this repository may not have been tested as

extensively as that contained in the main release, although it includes

newer versions of some applications which may provide useful features.

Also, please note that software in backports WILL NOT receive any review

or updates from the Ubuntu security team.

deb http://cn.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse

deb-src http://cn.archive.ubuntu.com/ubuntu/ focal-backports main restricted universe multiverse

Uncomment the following two lines to add software from Canonical's

'partner' repository.

This software is not part of Ubuntu, but is offered by Canonical and the

respective vendors as a service to Ubuntu users.

deb http://archive.canonical.com/ubuntu focal partner

deb-src http://archive.canonical.com/ubuntu focal partner

deb http://security.ubuntu.com/ubuntu focal-security main restricted

deb-src http://security.ubuntu.com/ubuntu focal-security main restricted

deb http://security.ubuntu.com/ubuntu focal-security universe

deb-src http://security.ubuntu.com/ubuntu focal-security universe

deb http://security.ubuntu.com/ubuntu focal-security multiverse

deb-src http://security.ubuntu.com/ubuntu focal-security multiverse

This system was installed using small removable media

(e.g. netinst, live or single CD). The matching "deb cdrom"

entries were disabled at the end of the installation process.

For information about how to configure apt package sources,

see the sources.list(5) manual.

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版权声明：本文为CSDN博主「一洛玉壶冰」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/ynzzxc/article/details/115190762

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