Tool definition
![Tool definition. Xcode command line tools. install command line tools xcode mac. $ brew install wget. bind <key> [command] : attach a command to a key.](https://images0.cnblogs.com/i/541831/201404/242258204983616.png "Xcode command line tools. install command line tools xcode mac. $ brew install wget. bind <key> [command] : attach a command to a key.")
