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.pdf2.自定义命令1).进入/home/xxx目录下cd /home/xxx2).终端执行如下命令，打开.bashrc文件vi

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-develchkconfig mysqld on ; /etc/init.d/mysqld start

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

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yumrpm -aq|grep yum|xargs rpm -e --nodeps  卸载

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

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 =

ubuntu12When you run a rvm command such as$ rvm use 1.9.3but receive an error message ofRVM is not a function, selecting rubies with 'rvm use ...' will not work.This error happens

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

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-

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 3.1.1There

在ubuntu下安装rails，每次重启后，都提示未安装railsruby -vgem -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/

一个是用rvm安装ruby的时候，出现Ruby123456Installing requirements for ubuntu, might require sudo password.Running 'apt-get --quiet --yes update' would require sudo.Cowardly refu

# 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