因为环境依赖问题，直接安装gd库会报错，所以需要先安装更新依赖 先更新软件源，比如换成中科大的 ``` echo 'deb https://mirrors.ustc.edu.cn/debian/ buster main contrib non-free' > /etc/apt/sources.list echo 'deb https://mirrors.ustc.edu.cn/debian/ buster-updates main contrib non-free' >> /etc/apt/sources.list echo 'deb https://mirrors.ustc.edu.cn/debian/ buster-backports main contrib non-free' >> /etc/apt/sources.list echo 'deb https://mirrors.ustc.edu.cn/debian-security/ buster/updates main contrib non-free' >> /etc/apt/sources.list echo 'deb-src https://mirrors.ustc.edu.cn/debian/ buster main contrib non-free' >> /etc/apt/sources.list echo 'deb-src https://mirrors.ustc.edu.cn/debian/ buster-updates main contrib non-free' >> /etc/apt/sources.list echo 'deb-src https://mirrors.ustc.edu.cn/debian/ buster-backports main contrib non-free' >> /etc/apt/sources.list echo 'deb-src https://mirrors.ustc.edu.cn/debian-security/ buster/updates main contrib non-free' >> /etc/apt/sources.list ``` 然后更新，安装 ``` apt update apt install -y libwebp-dev libjpeg-dev libpng-dev libfreetype6-dev ``` 这时还会遇到环境依赖问题，报错如下 ``` zlib1g-dev : Depends: zlib1g (= 1:1.2.11.dfsg-1+deb10u1) but 1:1.2.11.dfsg-2+deb11u1 is to be installed ``` 此时要降级安装所需依赖 ~~~ apt install zlib1g=1:1.2.11.dfsg-2ubuntu1 ~~~ 安装好后，就可以安装gd库了，不过需要加入相应的编译参数编译，命令如下(php7.4) ``` docker-php-ext-configure gd --with-webp=/usr/include/webp --with-jpeg=/usr/include --with-freetype=/usr/include/freetype2/ ``` 或者（php7.4之前） ``` docker-php-ext-configure gd --with-webp-dir=/usr/include/webp --with-jpeg-dir=/usr/include --with-png-dir=/usr/include --with-freetype-dir=/usr/include/freetype2 ``` 然后是安装了 ``` docker-php-ext-install gd ``` 接下来，重新运行容器，就好了