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MAC 下Navicat Premium有14天的试用期，倘若到期了，想继续试用，有办法吗，答案是有的，这里以15.0.26为例。

步骤1：

删除文件

rm ~/Library/Preferences/com.prect.NavicatPremium15.plist

步骤2：

进入文件夹

cd ~/Library/Application\ Support/PremiumSoft\ CyberTech/Navicat\ CC/Navicat\ Premium/

查看隐藏文件

ls -a

删除点开头的文件

rm .A73678B6B9CCD92B3C1CBYEIHUR

（1）GIS与水文学

https://blog.csdn.net/liyuanxiang1984/article/details/73384891

（2）ArcGIS水文分析工具的基本原理

https://blog.csdn.net/liyuanxiang1984/article/details/73481721

（3）DEM数据准备

https://blog.csdn.net/liyuanxiang1984/article/details/73556684

（4）地形预处理

https://blog.csdn.net/liyuanxiang1984/article/details/73824774

（5）细说流向与流量

https://blog.csdn.net/liyuanxiang1984/article/details/73863609

（6）河流提取与河网分级

https://blog.csdn.net/liyuanxiang1984/article/details/73928254

（7）细说流域提取

https://blog.csdn.net/liyuanxiang1984/article/details/74012574

（8）水库库容计算

https://blog.csdn.net/liyuanxiang1984/article/details/74276145

（9）雨量计算与流量统计

https://blog.csdn.net/liyuanxiang1984/article/details/74611136

（10）河流平均比降计算

https://blog.csdn.net/liyuanxiang1984/article/details/74989656

(11)河流提取流程

https://blog.csdn.net/liyuanxiang1984/article/details/78228141

(12)河网分级流程

https://blog.csdn.net/liyuanxiang1984/article/details/78228207

(13)流域提取流程

https://blog.csdn.net/liyuanxiang1984/article/details/78228231

(14)提取水库湖泊等面状水系

https://blog.csdn.net/liyuanxiang1984/article/details/78228266

(15)库容和淹没区计算

https://blog.csdn.net/liyuanxiang1984/article/details/78228285

(16) ArcHydro 修正地形

https://blog.csdn.net/liyuanxiang1984/article/details/80596326

(17) 构建简单的ArcHydro数据模型

https://blog.csdn.net/liyuanxiang1984/article/details/80616543

(18) 河段桩号与线性参考

https://blog.csdn.net/liyuanxiang1984/article/details/80623624

1 复制源文件备份

cp /etc/apt/sources.list /etc/apt/sources.list.bak

2 设置源文件为空文件

cp /dev/null /etc/apt/sources.list

3 编辑源文件内容为阿里源

vi /etc/apt/sources.list

复制并保存以下内容

deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse

deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse

全局配置切换为阿里云 Composer 国内镜像

composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/

华为云 镜像（推荐）

composer config -g repo.packagist composer https://mirrors.huaweicloud.com/repository/php/

腾讯云 镜像

composer config -g repos.packagist composer https://mirrors.cloud.tencent.com/composer/

Packagist 中国全量镜像

composer config -g repo.packagist composer https://packagist.phpcomposer.com

Composer 多进程并行下载依赖包，安装prestissimo扩展包即可。

composer global require hirak/prestissimo
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