# Linux與基礎資安分析實務課程

## :memo:作業系統(Operating System)簡介

### 作業系統功能：
- 系統資源分配
- 程式執行控制

⇒ 使用者與電腦硬體的媒介
⇒ 電腦系統的核心與基石
![]()

- [ ] mkdir建立資料夾
- [ ]

:rocket:

### Linux CTF 9
[下載檔案後步驟
1.ls -al=>檢查是否下載查看權限
2.file<檔案>=>檔案類型
3.(1)文字檔=>cat<檔案>
(2)執行檔=>更變權限後執行
(3)壓縮檔(打包)=>解壓縮(打包)

ls[列出當前目錄]
/tmp$ mkdir 1235[在當前目錄下建立子目錄1235]
/tmp$ ls[列出當前目錄]
/tmp$ cd 1235[更新當前工作目錄]
/tmp/1235$ wget http://120.114.62.217/TobeExe
[下載檔案]
lab@fd5af866542c:/tmp/1235$ ls
TobeExe TobeExe.1
lab@fd5af866542c:/tmp/1235$ ls -l
total 16
-rw-r--r-- 1 lab lab 7348 Nov 15 2017 TobeExe
-rw-r--r-- 1 lab lab 7348 Nov 15 2017 TobeExe.1
lab@fd5af866542c:/tmp/1235$ file TobeExe
TobeExe: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=10558357d3700c05f1426a6d2a09b920bda2e464, not stripped
/tmp/1235$ chmod +x TobeExe[增加擁有者執行權限]
/tmp/1235$ ls -1[列出目錄內容]
TobeExe
TobeExe.1
/tmp/1235$ ./TobeExe [執行]
BreakALLCTF{UvB3IUqxCCiTVxeOuWrL}

- [x] **Bold**
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[GitHub-Sync]: https://hackmd.io/c/tutorials/%2Fs%2Flink-with-github
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