If you type a command name, then bash looks for that command on your path, which is a colon-separated list of directories in the path environment variable.
如果输入一个命令名，那么bash将在您的路径(path)中查找该命令，路径就是指path环境变量中以冒号分隔的目录列表。
If you type a command name, then bash looks for that command on your path, which is a colon-separated list of directories in the path environment variable.
如果输入一个命令名，那么bash将在您的路径(path)中查找该命令，路径就是指path环境变量中以冒号分隔的目录列表。
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