无法下载composer php

我在下载composer php时遇到这种错误。

php composer-setup.php All settings correct for using Composer PHP Warning: file_put_contents(/home/vasu/.composer/keys.dev.pub): failed to open stream: Permission denied in /home/vasu/composer-setup.php on line 468 PHP Warning: file_put_contents(/home/vasu/.composer/keys.tags.pub): failed to open stream: Permission denied in /home/vasu/composer-setup.php on line 485 Downloading 1.2.0... PHP Warning: openssl_verify(): supplied key param cannot be coerced into a public key in /home/vasu/composer-setup.php on line 576 PHP Warning: openssl_free_key() expects parameter 1 to be resource, boolean given in /home/vasu/composer-setup.php on line 577 Signature mismatch, could not verify the phar file integrity 

Answer 1

简单的方法

首先尝试简单的方法。 由于评论中提到的错误消息，这个答案中包含了很难的方法。

 sudo mkdir -p /usr/local/bin sudo apt-get install curl curl -sS https://getcomposer.org/installer | php sudo mv composer.phar /usr/local/bin/composer 

在Ubuntu 16.04及更高版本中，composer可以从默认的Ubuntu存储库安装。 打开终端并输入：

 sudo apt install composer 

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艰辛的道路

首先检查/usr/local/bin/存在，如果没有，则检查/usr/local/bin/目录。

 sudo mkdir -p /usr/local/bin 

如果/usr/local/bin/已经存在，除了返回此消息之外，上述命令将不执行任何操作：

 mkdir: cannot create directory '/usr/local/bin': File exists 

运行以下命令：

 sudo chmod -R 755 /usr/local/bin/ cd /usr/local/bin/ ls # list the old composer file(s) sudo rm  # delete the old composer file(s) sudo apt-get install curl curl -sS https://getcomposer.org/installer | php sudo mv composer.phar /usr/local/bin/composer 

然后，如果您在终端中键入composer ，它将在您的系统中全局访问。