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How to set Oracle's Java as the default Java in Ubuntu?
...nvironment variables globally and at system level means use should set in /etc/environment file.
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Linux环境离线安装docker&docker-compose - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...docker服务
# 创建docker服务配置文件docker.service
sudo vim /etc/systemd/system/docker.service
# 在文件中添加一下内容：
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
W...
不同品牌的防火墙组成高可靠性集群 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...可以对应一个别名，编号和别名的对应关系在linux下放在/etc/iproute2/rt_tables这个文件里，一般0编号
的table对应的别名为upspec，255编号对应的别名为local，254和253对应的别名分别为main和default，我们通常用route命令配置和查看的路由...
How to install Maven 3 on Ubuntu 18.04/17.04/16.10/16.04 LTS/15.10/15.04/14.10/14.04 LTS/13.10/13.04
... it if apt-get update gives a NO_PUBKEY error after manually adding it to /etc/apt/sources.list
Open a terminal and run the following:
sudo -i
Enter your password if necessary, then paste the following into the terminal:
export GOOD_RELEASE='precise'
export BAD_RELEASE="`lsb_release -cs`"
cd /...
How can I call controller/view helper methods from the console in Ruby on Rails?
... # get you the HTML
> response.cookies # hash of the cookies
# etc, etc
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D Programming Language in the real world? [closed]
...de garbage collection, a monitor object for each class, runtime type info, etc.
Unlike Ruby, Python, PHP, etc, D tries to be almost as fast as C, even if it is less dynamic and slightly more difficult to program in than scripting languages.
The result is a language that is optimal when both develo...
How to start nginx via different port(other than 80)
...
You have to go to the /etc/nginx/sites-enabled/ and if this is the default configuration, then there should be a file by name: default.
Edit that file by defining your desired port; in the snippet below, we are serving the Nginx instance on port 8...
How can I eliminate slow resolving/loading of localhost/virtualhost (a 2-3 second lag) on Mac OS X L
...server is looking at 127.0.0.1, those hosts need to be at the HEAD of the /etc/hosts file for fast lookups. I have several dozen 127.0.0.1 lines, only when I moved them to the TOP of the /etc/hosts file did they resolve fast for me.
– Joey T
Apr 26 '14 at 3:11...
Default visibility for C# classes and members (fields, methods, etc.)?
... visibility of various aspects of C#. Class types, fields, methods, enums, etc.
4 Answers
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How to declare a structure in a header that is to be used by multiple files in c?
...used:
struct MyStruct ; /* Forward declaration */
struct MyStruct
{
/* etc. */
} ;
void doSomething(struct MyStruct * p) /* parameter */
{
struct MyStruct a ; /* variable */
/* etc */
}
While a typedef will enable you to write it without the struct keyword.
struct MyStructTag ; /* Forwar...