What's a command?
It's a binary file kept under specific directory
以下是一些常用的 Linux 基本命令：
1. 文件和目录管理
ls：列出当前目录中的文件和文件夹。
cd：更改当前工作目录。
pwd：显示当前工作目录的路径。
VPC Traffic Flow and SecurityCreating a Private SubnetLaunching VPC ResourcesTesting VPC ConnectivityVPC PeeringVPC Monitoring with Flow LogsAccess S3 from a VPCCI/CD with CodePipelineCompany
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