本文主要介绍了在Ubuntu22.04系统中使用文本处理工具如cat,head,tail,grep,sed,awk进行文本过滤、行编辑、用户管理以及磁盘存储基础知识，包括SSH连接验证、文件操作和基础编程任务的示例。
家人们谁懂啊啊 疯狂赶进度
- 文本处理工具
cat head tail 结合使用
cxn@ubuntu2204:~$ cat aaa.txt
Nov 13 03:17:56 pbzjack sshd[1464]: Connection closed by 112.4.65.118 port 45206 [preauth]
Nov 13 03:18:04 pbzjack sshd[1522]: Invalid user ubuntu from 110.42.234.146 port 52268
Nov 13 03:18:04 pbzjack sshd[1522]: input_userauth_request: invalid user ubuntu [preauth]
Nov 13 03:18:04 pbzjack sshd[1522]: Received disconnect from 110.42.234.146 port 52268:11: Bye Bye [preauth]
Nov 13 03:18:04 pbzjack sshd[1522]: Disconnected from 110.42.234.146 port 52268 [preauth]
Nov 13 03:19:10 pbzjack sshd[1760]: Invalid user redhat from 159.223.87.87 port 34400
Nov 13 03:19:10 pbzjack sshd[1760]: input_userauth_request: invalid user redhat [preauth]
Nov 13 03:19:10 pbzjack sshd[1760]: Connection closed by 159.223.87.87 port 34400 [preauth]
Nov 
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