24 Sep 2015
作用：无交互的网络文件下载器
语法：wget [参数] URL
参数：
-0 filename/-，前者是重定向到filename中，后者是直接重定向到stdout-q，等同于--quiet，关闭wget的输出信息用法举例：
# -O 直接指定文件 wget -O image http://global.mifile.cn/webfile/globalimg/sg/banner/mi4i_pricedrop.png file image image: PNG image data, 2240 x 550, 8-bit/color RGB, non-interlaced # -O 后面不跟文件跟'-' wget -qO- https://get.docker.com # 下载下来的文件会以系统stdout的方式显示出来 # docker的安装示例 wget -qO- https://get.docker.com |sh + sh -c 'sleep 3; yum -y -q install docker-engine' warning: /var/cache/yum/x86_64/7/docker-main-repo/packages/docker-engine-1.8.2-1.el7.centos.x86_64.rpm: Header V4 RSA/SHA1 Signature, key ID 2c52609d: NOKEY Public key for docker-engine-1.8.2-1.el7.centos.x86_64.rpm is not installed Importing GPG key 0x2C52609D: Userid : "Docker Release Tool (releasedocker) <docker@docker.com>" Fingerprint: 5811 8e89 f3a9 1289 7c07 0adb f762 2157 2c52 609d From : https://yum.dockerproject.org/gpg If you would like to use Docker as a non-root user, you should now consider adding your user to the "docker" group with something like: sudo usermod -aG docker your-user Remember that you will have to log out and back in for this to take effect!