# Installation

## 双系统

### 制作启动盘

#### MAC

参考自： 插入U盘->Launchpad->磁盘管理工具->格式化U盘为MAC日志，GUID分配方式。\
查看U盘分配的设备号：

```bash
diskutil -list
```

卸载已经加载的U盘(以/dev/disk2为例)：

```bash
diskutil unmountDisk /dev/disk2
```

使用dd命令复制iso文件到U盘，等待几分钟：

```bash
sudo dd if=~/Downloads/ubuntu-17.04-desktop-amd64.iso of=/dev/disk2 bs=1m

其中：   
if是输入文件   
of是输出文件    
bs是传输文件速度
```

直到出现records in，records out，即成功了。

```bash
1534+1 records in
1534+1 records out
```

### Windows+Linux双系统

[超详细！Win10（UEFI启动）安装Ubuntu18.04双系统](https://blog.csdn.net/qq_38962621/article/details/87390603)

## 虚拟机

## 无root时的安装

[Linux下编译软件时指定安装目录](https://blog.csdn.net/E_pen/article/details/51889588)

## GCC

```bash
yum install centos-release-scl -y
yum install devtoolset-7-gcc* -y

#temporary set
scl enable devtoolset-7 bash

#permanent set for every one
vim /etc/profile
source /opt/rh/devtoolset-7/enable
```

Reference: [CentOS7升级GCC版本](https://blog.csdn.net/jiangshuanshuan/article/details/103890748)


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