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what is the default content of /etc/apt/sources.list in Ubuntu 18.04 LTS (Bionic Beaver)

Where can I find the default content of /etc/apt/sources.list in Ubuntu 18.04 LTS (Bionic Beaver)

cat /etc/apt/sources.list shows

# deb cdrom:[Ubuntu 16.04.2 LTS _Xenial Xerus_ - Release amd64 (20170215.2)]/ xenial main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://in.archive.ubuntu.com/ubuntu/ bionic main restricted universe
deb-src http://in.archive.ubuntu.com/ubuntu/ bionic multiverse restricted universe main #Added by software-properties
# deb-src http://in.archive.ubuntu.com/ubuntu/ xenial main restricted

## Major bug fix updates produced after the final release of the …

software-center updates update-manager apt software-sources

Dip*_*lui

lucky-day

8
推荐指数

1
解决办法

5万
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如何更改默认应用程序以在 Ubuntu Bionic Beaver（开发分支）中打开 xml 文件？

我按照这个和这个来更改默认应用程序。但它不起作用。

我尝试将文本编辑器更改为默认应用程序以打开 xml 文件，但它没有更改。默认是火狐。

cat /etc/os-release 
名称=“Ubuntu”
VERSION="18.04 LTS (仿生海狸)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu Bionic Beaver（开发分支）"
VERSION_ID="18.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=仿生
UBUNTU_CODENAME=仿生