janne09的专栏

1.打开pdf文件 文件所在目录：/home/xxx/book 终端执行命令： evince /home/xxx/book/filename.pdf 或者： xdg-open /home/xxx/book/filename.pdf 2.自定义命令 1).进入/home/xxx目录下 cd /home/xxx 2).终端执行如下命令，打开.bashrc文件 vi

一个是用rvm安装ruby的时候，出现 Ruby 123456Installing requirements for ubuntu, might require sudo password.Running 'apt-get --quiet --yes update' would require sudo.Cowardly refu

在ubuntu下安装rails，每次重启后，都提示未安装rails ruby -v gem -v 都正常 gem install rails提示安装成功，但是rails -v时，提示rails 未安装 修改终端设置如下即可： 原文地址：https://rvm.io/integration/gnome-terminal/

Download the Savvy Digital Marketer's Guide to Social Content Marketing!. I recently upgraded my Ruby on Rails installation from Ruby 1.8.7 and Rails 2.3.2 to Ruby 1.9.3 and Rails 3.1.1 There

执行rails s 时提示：Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. sudo apt-get install python-software-properties  sudo add-apt-

ow can I install Nginx web server On CentOS Linux 6 or Red Hat Enterprise Linux 6 using yum command? Tutorial details   Difficulty Intermediate (rss) Root privileges

ubuntu12 When you run a rvm command such as $ rvm use 1.9.3 but receive an error message of RVM is not a function, selecting rubies with 'rvm use ...' will not work. This error happens

require 'rubygems'require 'active_record'require 'mysql2'require 'net/ssh/gateway' gateway = Net::SSH::Gateway.new( 'remotehost.com', 'username') # opens a new port on the established gatewayport =

使用rvm进行版本控制 vim ~/.bashrc 打开.bashrc文件，将代码写入文件中  source "$HOME/.rvm/scripts/rvm" 保存退出，重启电脑即可 详情参考官方文档 https://rvm.io/rvm/install/ 章节 2. Load RVM into your shell sessions as a function

RedHat 6.2（64位）如何使用CentOS YUM源更新的方法           由于 redhat的yum在线更新是收费的，如果没有注册的话不能使用，如果要使用，需将redhat的yum卸载后，重启安装，再配置其他源，以下为详细过程 1.删除redhat原有的yum rpm -aq|grep yum|xargs rpm -e --nodeps    卸载

On Ubuntu/Debian and other distributions using aptitude: sudo apt-get install libmysql-ruby libmysqlclient-dev On Red Hat/CentOS and other distributions using yum: sudo yum install mysql-devel

redhat 安装mysql服务器： Next, install MySQL. This is the one step that RHN handles, thankfully… sudo yum install mysql mysql-server mysql-devel chkconfig mysqld on ; /etc/init.d/mysqld start

# yum install openssl-devel # cd /usr/local/src # wget http://nodejs.org/dist/node-latest.tar.gz # tar zxvf node-latest.tar.gz (cd into extracted folder: ex "cd node-v0.10.3") # ./configure # make # m