composer linux全局安裝

我把它放在系統的PATH目錄中，這樣就能在全局訪問它。

curl -sS https://getcomposer.org/installer | php mv composer.phar /usr/local/bin/composer

注意：若是上訴命令由於權限執行失敗， 請使用 sudo 再次嘗試運行 mv那行命令。

輸入命令：composer -V

Composer version 1.0-dev (feefd51565bb8ead38e355b9e501685b5254d

liuxiaoqiang@liuxiaoqiang /var/www $ sudo curl -sS https://getcomposer.org/installer | php
[sudo] password for liuxiaoqiang: 
All settings correct for using Composer
Downloading...


Composer successfully installed to: /var/www/composer.phar
Use it: php composer.phar
liuxiaoqiang@liuxiaoqiang /var/www $ sudo mv composer.phar /usr/local/bin/composer
liuxiaoqiang@liuxiaoqiang /var/www $ composer -V
Composer version 1.0-dev (24f04f7dbfb7321fda1a973cf9af41684322cf01) 2016-03-14 11:34:00
```

官網提供的下載包
下載 Laravel 一鍵安裝包

安裝 Composer 或經過 Composer 下載 Laravel 的依賴包時均可能被牆，爲了方便你們學習和開發 Laravel 應用，Laravel 中文網已經提供了 Laravel 各個版本的一鍵安裝包。這些一鍵安裝包都已經集成了全部依賴（也就是已經執行過 composer install 了，vendor 目錄已經就緒）。

下載地址：http://www.golaravel.com/download/

裏面有一個vendor包

在網站目錄執行composer install，產生的文件和這個是一個道理，具體代碼以下

```
liuxiaoqiang@liuxiaoqiang ~/tfan/jifen/jifen $ composer install
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
  - Installing jakub-onderka/php-console-color (0.1)
    Downloading: 100%         

  - Installing vlucas/phpdotenv (v2.2.0)
    Downloading: 100%         

  - Installing symfony/polyfill-mbstring (v1.1.0)
    Downloading: 100%         

  - Installing symfony/var-dumper (v3.0.3)
    Downloading: 100%         

  - Installing symfony/translation (v3.0.3)
    Downloading: 100%         

  - Installing symfony/routing (v3.0.3)
    Downloading: 100%         

  - Installing symfony/process (v3.0.3)
    Downloading: 100%         

  - Installing symfony/polyfill-util (v1.1.0)
    Downloading: 100%         

  - Installing symfony/polyfill-php56 (v1.1.0)
    Downloading: 100%         

  - Installing symfony/http-foundation (v3.0.3)
    Downloading: 100%         

  - Installing symfony/event-dispatcher (v3.0.3)
    Downloading: 100%         

  - Installing psr/log (1.0.0)
    Downloading: 100%         

  - Installing symfony/debug (v3.0.3)
    Downloading: 100%         

  - Installing symfony/http-kernel (v3.0.3)
    Downloading: 100%         

  - Installing symfony/finder (v3.0.3)
    Downloading: 100%         

  - Installing symfony/console (v3.0.3)
    Downloading: 100%         

  - Installing swiftmailer/swiftmailer (v5.4.1)
    Downloading: 100%         

  - Installing nikic/php-parser (v2.0.1)
    Downloading: 100%         

  - Installing jakub-onderka/php-console-highlighter (v0.3.2)
    Downloading: 100%         

  - Installing dnoegel/php-xdg-base-dir (0.1)
    Downloading: 100%         

  - Installing psy/psysh (v0.7.1)
    Downloading: 100%         

  - Installing paragonie/random_compat (v1.2.1)
    Downloading: 100%         

  - Installing nesbot/carbon (1.21.0)
    Downloading: 100%         

  - Installing mtdowling/cron-expression (v1.1.0)
    Downloading: 100%         

  - Installing monolog/monolog (1.18.0)
    Downloading: 100%         

  - Installing league/flysystem (1.0.18)
    Loading from cache

  - Installing jeremeamia/superclosure (2.2.0)
    Downloading: 100%         

  - Installing doctrine/inflector (v1.1.0)
    Downloading: 100%         

  - Installing classpreloader/classpreloader (3.0.0)
    Downloading: 100%         

  - Installing laravel/framework (v5.2.22)
    Downloading: 100%         

  - Installing fzaninotto/faker (v1.5.0)
    Downloading: 100%         

  - Installing hamcrest/hamcrest-php (v1.2.2)
    Downloading: 100%         

  - Installing mockery/mockery (0.9.4)
    Downloading: 100%         

  - Installing phpdocumentor/reflection-docblock (2.0.4)
    Downloading: 100%         

  - Installing phpunit/php-token-stream (1.4.8)
    Downloading: 100%         

  - Installing symfony/yaml (v3.0.3)
    Downloading: 100%         

  - Installing sebastian/version (1.0.6)
    Downloading: 100%         

  - Installing sebastian/global-state (1.1.1)
    Downloading: 100%         

  - Installing sebastian/recursion-context (1.0.2)
    Downloading: 100%         

  - Installing sebastian/exporter (1.2.1)
    Downloading: 100%         

  - Installing sebastian/environment (1.3.5)
    Downloading: 100%         

  - Installing sebastian/diff (1.4.1)
    Downloading: 100%         

  - Installing sebastian/comparator (1.2.0)
    Downloading: 100%         

  - Installing phpunit/php-text-template (1.2.1)
    Downloading: 100%         

  - Installing doctrine/instantiator (1.0.5)
    Downloading: 100%         

  - Installing phpunit/phpunit-mock-objects (2.3.8)
    Downloading: 100%         

  - Installing phpunit/php-timer (1.0.7)
    Downloading: 100%         

  - Installing phpunit/php-file-iterator (1.4.1)
    Downloading: 100%         

  - Installing phpunit/php-code-coverage (2.2.4)
    Downloading: 100%         

  - Installing phpspec/prophecy (v1.6.0)
    Downloading: 100%         

  - Installing phpunit/phpunit (4.8.23)
    Downloading: 100%         

  - Installing symfony/css-selector (v3.0.3)
    Downloading: 100%         

  - Installing symfony/dom-crawler (v3.0.3)
    Downloading: 100%         

symfony/var-dumper suggests installing ext-symfony_debug ()
symfony/translation suggests installing symfony/config ()
symfony/routing suggests installing doctrine/annotations (For using the annotation loader)
symfony/routing suggests installing symfony/config (For using the all-in-one router or any loader)
symfony/routing suggests installing symfony/dependency-injection (For loading routes from a service)
symfony/routing suggests installing symfony/expression-language (For using expression matching)
symfony/event-dispatcher suggests installing symfony/dependency-injection ()
symfony/http-kernel suggests installing symfony/browser-kit ()
symfony/http-kernel suggests installing symfony/class-loader ()
symfony/http-kernel suggests installing symfony/config ()
symfony/http-kernel suggests installing symfony/dependency-injection ()
psy/psysh suggests installing ext-pdo-sqlite (The doc command requires SQLite to work.)
paragonie/random_compat suggests installing ext-libsodium (Provides a modern crypto API that can be used to generate random bytes.)
monolog/monolog suggests installing aws/aws-sdk-php (Allow sending log messages to AWS services like DynamoDB)
monolog/monolog suggests installing doctrine/couchdb (Allow sending log messages to a CouchDB server)
monolog/monolog suggests installing ext-amqp (Allow sending log messages to an AMQP server (1.0+ required))
monolog/monolog suggests installing ext-mongo (Allow sending log messages to a MongoDB server)
monolog/monolog suggests installing graylog2/gelf-php (Allow sending log messages to a GrayLog2 server)
monolog/monolog suggests installing mongodb/mongodb (Allow sending log messages to a MongoDB server via PHP Driver)
monolog/monolog suggests installing php-console/php-console (Allow sending log messages to Google Chrome)
monolog/monolog suggests installing raven/raven (Allow sending log messages to a Sentry server)
monolog/monolog suggests installing rollbar/rollbar (Allow sending log messages to Rollbar)
monolog/monolog suggests installing ruflin/elastica (Allow sending log messages to an Elastic Search server)
monolog/monolog suggests installing videlalvaro/php-amqplib (Allow sending log messages to an AMQP server using php-amqplib)
league/flysystem suggests installing league/flysystem-aws-s3-v2 (Allows you to use S3 storage with AWS SDK v2)
league/flysystem suggests installing league/flysystem-aws-s3-v3 (Allows you to use S3 storage with AWS SDK v3)
league/flysystem suggests installing league/flysystem-azure (Allows you to use Windows Azure Blob storage)
league/flysystem suggests installing league/flysystem-cached-adapter (Flysystem adapter decorator for metadata caching)
league/flysystem suggests installing league/flysystem-copy (Allows you to use Copy.com storage)
league/flysystem suggests installing league/flysystem-dropbox (Allows you to use Dropbox storage)
league/flysystem suggests installing league/flysystem-eventable-filesystem (Allows you to use EventableFilesystem)
league/flysystem suggests installing league/flysystem-rackspace (Allows you to use Rackspace Cloud Files)
league/flysystem suggests installing league/flysystem-sftp (Allows you to use SFTP server storage via phpseclib)
league/flysystem suggests installing league/flysystem-webdav (Allows you to use WebDAV storage)
league/flysystem suggests installing league/flysystem-ziparchive (Allows you to use ZipArchive adapter)
laravel/framework suggests installing aws/aws-sdk-php (Required to use the SQS queue driver and SES mail driver (~3.0).)
laravel/framework suggests installing doctrine/dbal (Required to rename columns and drop SQLite columns (~2.4).)
laravel/framework suggests installing guzzlehttp/guzzle (Required to use the Mailgun and Mandrill mail drivers and the ping methods on schedules (~5.3|~6.0).)
laravel/framework suggests installing league/flysystem-aws-s3-v3 (Required to use the Flysystem S3 driver (~1.0).)
laravel/framework suggests installing league/flysystem-rackspace (Required to use the Flysystem Rackspace driver (~1.0).)
laravel/framework suggests installing pda/pheanstalk (Required to use the beanstalk queue driver (~3.0).)
laravel/framework suggests installing predis/predis (Required to use the redis cache and queue drivers (~1.0).)
laravel/framework suggests installing pusher/pusher-php-server (Required to use the Pusher broadcast driver (~2.0).)
fzaninotto/faker suggests installing ext-intl (*)
phpdocumentor/reflection-docblock suggests installing dflydev/markdown (~1.0)
phpdocumentor/reflection-docblock suggests installing erusev/parsedown (~1.0)
sebastian/global-state suggests installing ext-uopz (*)
phpunit/php-code-coverage suggests installing ext-xdebug (>=2.2.1)
phpunit/phpunit suggests installing phpunit/php-invoker (~1.1)
Generating autoload files
> php artisan clear-compiled
> php artisan optimize
Generating optimized class loader
Compiling common classes
liuxiaoqiang@liuxiaoqiang ~/tfan/jifen/jifen $ 
```