纱线错误:没有场景;必须至少有一个

看起来我试着执行了错误的任务,因为仅仅是运行 sudo apt install yarn 在我的Ubuntu 18.04上给了我 yarn from cmdtest

所以我通过卸载解决了这个问题:

sudo apt remove yarn

official website explains ,在我的例子(Ubuntu 18.04)中是这样的:

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list

sudo apt update && sudo apt install yarn

yarn

你猜错了。你正在表演的故事来自 cmdtest 包裹首先卸载cmdtest可以解决以下问题:

sudo apt remove cmdtest

卸载后,运行以下命令以正确安装yarn:

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
sudo apt update
sudo apt install yarn

安装时应该使用的真实名称是yarnpkg

sudo apt install yarnpkg

这就是解决方案。

一步一步地尝试。这对我很有效。

sudo apt remove yarn
sudo apt install curl
curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
sudo apt update
sudo apt install yarn

sudo npm install -g yarn

然后打开一个新的终端窗口,键入“纱线——版本”

升级到nodejs后,我开始收到这个错误。 修复这些错误的步骤是:

1. sudo apt remove cmdtest
2. sudo apt autoremove
3. sudo npm install -g yarn

看起来你试着执行了错误的任务,因为仅仅是运行 sudo apt install yarn 在您的 Ubuntu 18.04 cmdtest .

为了解决这个问题,你应该从官方网站安装纱线 https://yarnpkg.com/getting-started/install . 我建议在上述网站上阅读更多关于纱线的信息

1. 要传输可以从curl使用的数据

   curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
   

   输出如下所示:

   OK
   

2. 要知道是否传输了数据,可以使用 回响 命令(它是linux内置命令)

   echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
   

   deb https://dl.yarnpkg.com/debian/ stable main
   

3. 要从所有配置的源下载包信息,请运行以下操作:

   sudo apt update && sudo apt install yarn
   

4. 此阶段结束后,检查纱线版本

   yarn --version
   

   输出如下所示

   1.22.18
   

也可以通过npm安装纱线

npm install -g yarn

这是名字 “yarnpkg” ,而不是“纱线”

#which yarn
/usr/bin/yarn

# which yarnpkg
/usr/bin/yarnpkg

#yarn --version
0.32+git

# yarnpkg --version
1.22.10


# cat /usr/bin/yarn

#!/usr/bin/python3
# Copyright 2013  Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# =*= License: GPL-3+ =*=


import cliapp
...




# cat /usr/bin/yarnpkg 


#!/usr/bin/env node

/* eslint-disable no-var */
/* eslint-disable flowtype/require-valid-file-annotation */
'use strict';

var ver = process.versions.node;
var majorVer = parseInt(ver.split('.')[0], 10);

if (majorVer < 4) {
  console.error('Node version ' + ver + ' is not supported, please use Node.js 4.0 or higher.');
  process.exit(1); // eslint-disable-line no-process-exit
} else {
  try {
    require(__dirname + '/../lib/v8-compile-cache.js');
  } catch (err) {
    // We don't have/need this on legacy builds and dev builds
  }

  // Just requiring this package will trigger a yarn run since the
  // `require.main === module` check inside `cli/index.js` will always
  // be truthy when built with webpack :(
  // `lib/cli` may be `lib/cli/index.js` or `lib/cli.js` depending on the build.
  var cli = require(__dirname + '/../lib/cli');
  if (!cli.autoRun) {
    cli.default().catch(function(error) {
      console.error(error.stack || error.message || error);
      process.exitCode = 1;
    });
  }
}

sudo apt安装--无安装建议