尝试去安装 Brave 网络浏览器，我最终得到错误“无法找到 brave-browser 包”。我该如何处理？
这是我的 LXTerminal 输出：
username@username-Latitude-D620:~$ curl https://brave-browser-apt-release.s3.brave.com/brave-core.asc | sudo apt-key add -
[sudo] password for username:
Command 'curl' not found, but can be installed with:
sudo apt install curl
Sorry, try again.
[sudo] password for username:
Sorry, try again.
[sudo] password for username:
sudo: 3 incorrect password attempts
username@username-Latitude-D620:~$ sudo apt install curl
[sudo] password for username:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
alsa-base cpp-5 evolution-data-server-online-accounts gksu gnupg-agent
gtk3-engines-unico gvfs-bin ibus-mozc libaccounts-qt5-1 libavfilter-ffmpeg5
libavresample-ffmpeg2 libboost-filesystem1.58.0 libboost-filesystem1.65.1
libboost-system1.58.0 libcapnp-0.5.3 libcapnp-0.6.1 libcdio-cdda1
libcdio-paranoia1 libcdio13 libchromaprint0 libestools2.4 libfcitx-qt0
libgcr-3-common libgksu2-0 libglu1-mesa libgmime-2.6-0 libgnome-desktop-3-12
libgnome2-0 libgnome2-bin libgrilo-0.2-1 libgtkglext1 libgtop-2.0-10
libgweather-3-6 libido3-0.1-0 libisl15 libjasper1 libllvm3.8 libllvm4.0
libllvm5.0 libmimic0 libmirclient9 libmircommon5 libmircommon7 libmircore1
libmirprotobuf3 libmpfr4 libnm-gtk-common libopencv-calib3d2.4v5
libopencv-contrib2.4v5 libopencv-core2.4v5 libopencv-features2d2.4v5
libopencv-flann2.4v5 libopencv-highgui2.4v5 libopencv-imgproc2.4v5
libopencv-legacy2.4v5 libopencv-ml2.4v5 libopencv-objdetect2.4v5
libopencv-video2.4v5 libpoppler58 libprotobuf-lite10 libprotobuf-lite9v5
libprotobuf9v5 libqt5opengl5 libqt5sql5 libqt5sql5-sqlite libqt5xml5
libquvi-scripts libquvi7 librhythmbox-core9 libsignon-extension1
libsignon-glib1 libsignon-plugins-common1 libsignon-qt5-1 libsodium18
libsrtp0 libtbb2 libvte-common libvte9 libwebpdemux1
libwebrtc-audio-processing-0 libwildmidi1 libxfont1 linux-headers-4.4.0-101
linux-headers-4.4.0-101-generic linux-headers-4.4.0-112
linux-headers-4.4.0-112-generic linux-headers-4.4.0-21
linux-headers-4.4.0-21-generic linux-headers-4.4.0-93
linux-headers-4.4.0-93-generic linux-headers-4.4.0-96
linux-headers-4.4.0-96-generic linux-headers-4.4.0-97
linux-headers-4.4.0-97-generic linux-image-4.4.0-101-generic
linux-image-4.4.0-112-generic linux-image-4.4.0-21-generic
linux-image-4.4.0-93-generic linux-image-4.4.0-96-generic
linux-image-4.4.0-97-generic linux-image-extra-4.4.0-101-generic
linux-image-extra-4.4.0-112-generic linux-image-extra-4.4.0-21-generic
linux-image-extra-4.4.0-93-generic linux-image-extra-4.4.0-96-generic
linux-image-extra-4.4.0-97-generic linux-sound-base lubuntu-artwork-16-04
python-appindicator signon-plugin-password signon-ui signon-ui-service
signon-ui-x11 signond x11-apps x11-session-utils xchat-gnome-common xinit
xorg
Use 'sudo apt autoremove' to remove them.
The following additional packages will be installed:
libcurl4
The following packages will be REMOVED:
libcurl3
The following NEW packages will be installed:
curl libcurl4
0 upgraded, 2 newly installed, 1 to remove and 0 not upgraded.
Need to get 400 kB of archives.
After this operation, 391 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://us.archive.ubuntu.com/ubuntu bionic-updates/main i386 libcurl4 i386 7.58.0-2ubuntu3.3 [238 kB]
Get:2 http://us.archive.ubuntu.com/ubuntu bionic-updates/main i386 curl i386 7.58.0-2ubuntu3.3 [162 kB]
Fetched 400 kB in 1s (791 kB/s)
(Reading database ... 370863 files and directories currently installed.)
Removing libcurl3:i386 (7.58.0-2ubuntu2) ...
Selecting previously unselected package libcurl4:i386.
(Reading database ... 370857 files and directories currently installed.)
Preparing to unpack .../libcurl4_7.58.0-2ubuntu3.3_i386.deb ...
Unpacking libcurl4:i386 (7.58.0-2ubuntu3.3) ...
Selecting previously unselected package curl.
Preparing to unpack .../curl_7.58.0-2ubuntu3.3_i386.deb ...
Unpacking curl (7.58.0-2ubuntu3.3) ...
Setting up libcurl4:i386 (7.58.0-2ubuntu3.3) ...
Processing triggers for libc-bin (2.27-3ubuntu1) ...
Processing triggers for man-db (2.8.3-2) ...
Setting up curl (7.58.0-2ubuntu3.3) ...
username@username-Latitude-D620:~$ curl https://brave-browser-apt-release.s3.brave.com/brave-core.asc | sudo apt-key add -
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 4715 100 4715 0 0 8946 0 --:--:-- --:--:-- --:--:-- 8929
OK
username@username-Latitude-D620:~$
username@username-Latitude-D620:~$ echo "deb [arch=amd64] https://brave-browser-apt-release.s3.brave.com/ `lsb_release -sc` main" | sudo tee -a /etc/apt/sources.list.d/brave-browser-release-`lsb_release -sc`.list
deb [arch=amd64] https://brave-browser-apt-release.s3.brave.com/ bionic main
username@username-Latitude-D620:~$
username@username-Latitude-D620:~$ sudo apt update
Hit:1 http://us.archive.ubuntu.com/ubuntu bionic InRelease
Get:2 http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Get:3 http://us.archive.ubuntu.com/ubuntu bionic-security InRelease [83.2 kB]
Get:4 https://brave-browser-apt-release.s3.brave.com bionic InRelease [2,825 B]
Get:5 https://brave-browser-apt-release.s3.brave.com bionic/main amd64 Packages [1,521 B]
Fetched 176 kB in 2s (114 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.
username@username-Latitude-D620:~$
username@username-Latitude-D620:~$ sudo apt install brave-browser
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package brave-browser
username@username-Latitude-D620:~$ curl https://brave-browser-apt-release.s3.brave.com/brave-core.asc | sudo apt-key add -
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 4715 100 4715 0 0 6371 0 --:--:-- --:--:-- --:--:-- 6363
OK
username@username-Latitude-D620:~$ echo "deb [arch=amd64] https://brave-browser-apt-release.s3.brave.com/ `lsb_release -sc` main" | sudo tee -a /etc/apt/sources.list.d/brave-browser-release-`lsb_release -sc`.list
deb [arch=amd64] https://brave-browser-apt-release.s3.brave.com/ bionic main
username@username-Latitude-D620:~$ sudo apt update
Hit:1 http://us.archive.ubuntu.com/ubuntu bionic InRelease
Get:2 http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Hit:3 https://brave-browser-apt-release.s3.brave.com bionic InRelease
Get:4 http://us.archive.ubuntu.com/ubuntu bionic-security InRelease [83.2 kB]
Fetched 172 kB in 1s (162 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.
W: Target Packages (main/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target Packages (main/binary-all/Packages) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target Translations (main/i18n/Translation-en_US) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target Translations (main/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target DEP-11 (main/dep11/Components-i386.yml) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target DEP-11 (main/dep11/Components-all.yml) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target DEP-11-icons-small (main/dep11/icons-48x48.tar) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target DEP-11-icons (main/dep11/icons-64x64.tar) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target CNF (main/cnf/Commands-i386) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target CNF (main/cnf/Commands-all) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target Packages (main/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target Packages (main/binary-all/Packages) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target Translations (main/i18n/Translation-en_US) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target Translations (main/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target DEP-11 (main/dep11/Components-i386.yml) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target DEP-11 (main/dep11/Components-all.yml) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target DEP-11-icons-small (main/dep11/icons-48x48.tar) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target DEP-11-icons (main/dep11/icons-64x64.tar) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target CNF (main/cnf/Commands-i386) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
W: Target CNF (main/cnf/Commands-all) is configured multiple times in /etc/apt/sources.list.d/brave-browser-release-bionic.list:1 and /etc/apt/sources.list.d/brave-browser-release-bionic.list:2
username@username-Latitude-D620:~$ sudo apt install brave-browser
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package brave-browser
username@username-Latitude-D620:~$
值得注意的是，我从 lubuntu 16 升级时遇到了错误：
无法安装“doc-base”：已安装的 doc-base 包安装后脚本子进程返回错误退出状态 10
升级结束时，“无法安装升级”：升级已中止。您的系统可能处于不可用状态。现在将运行恢复（dpkg -configure -a）。
但是，尽管存在 #2 问题，升级似乎还是成功的，并且修复了启动页面的视觉错误：在升级到 lubuntu 18 LTS 之前，我在大约一年没有使用笔记本电脑后安装了 lubuntu 16 LTS 的升级；它导致登录后 5 点加载屏幕的点图形仍然存在。在这次据称失败的升级到 18 后重新启动计算机，这个问题就解决了。
答案1
我收到了同样的消息。您可以将其安装为 snap 程序...
sudo snap install brave
您是否收到错误消息...sudo: snap: command not found
您不必snapd安装snap：
sudo apt-get install snapd
然后重复sudo snap install brave命令
答案2
您可以查看安装页面这里。
具体来说：
sudo apt install apt-transport-https curl gnupg
curl -s https://brave-browser-apt-release.s3.brave.com/brave-core.asc | sudo apt-key --keyring /etc/apt/trusted.gpg.d/brave-browser-release.gpg add -
echo "deb [arch=amd64] https://brave-browser-apt-release.s3.brave.com/ stable main" | sudo tee /etc/apt/sources.list.d/brave-browser-release.list
sudo apt update
sudo apt install brave-browser