備忘131228

有時候配置好環境的伺服器上運行rails c production會報錯

-bash: rails: command not foundn

這時可以嘗試下

bundle exec rails cn

有時候連接Mysql會報錯

ERROR 2002 (HY000): Cant connect to local MySQL server through socket /var/run/mysqld/mysql.sock (2)n

這時可以先ps ax | grep mysql查看進程是否在運行，如果沒有在運行

sudo service mysql startn

參考：ERROR 2002 (HY000): Cant connect to local MySQL server through socket /var/run/mysqld/mysql.sock (2)

有時候在運行一些命令時Ubuntu會報錯

Sorry, command-not-found has crashed! Please file a bug report at:nhttps://bugs.launchpad.net/command-not-found/+filebugnPlease include the following information with the report:nnncommand-not-found version: 0.2.44n

很有可能你也見到了要求檢查語言的警告

這時

#sudo vim /root/.bashrcnnlocale-gennn在尾部加入以下定義：nexport LC_CTYPE=en_US.UTF-8nexport LC_ALL=en_US.UTF-8nn#source /root/.bashrc　　　——>使用環境即時生效nn然後用dpkg-reconfigure locales測試看是否還會報錯n

參考：

1、Sorry, command-not-found has crashed!

2、Ubuntu 配置VNC時，出現「perl: warning: Falling back to the standard locale ("C").」等提示錯誤解決方法

有時候rake版本不對，報錯

You have already activated rake 0.9.0, but your Gemfile requires rake 0.8.7n

在Gemfile中明確rake的版本，如gem rake,0.8.7，然後bundle update rake升級

參考：You have already activated rake 0.9.0, but your Gemfile requires rake 0.8.7

有時候rails 4生成的應用不載入css，這時要在production.rb中解除

config.assets.css_compressor = :sass 的注釋