1. System Administration HW3 - Shell Script hchung

2. Computer Center, CS, NCTU 2 Requirements  User connect time statistic script (10%) Use one-line command to show user connect time statistic.  Spamming system (40%) Send massive mails with customized template and database.  GUI port manager (50%) Manage your ports with dialog boxes.

3. Computer Center, CS, NCTU 3 User Connect Time Statistic Script – Requirements (1/2)  Use one-line command  The following lines should NOT be counted User still logged in shutdown, reboot or other msgs not associated with accounting  log file location Use environment variable ‘LOG_FILE’ Default to /var/log/utx.log Results should be sorted by time  Output format USER TIME (in seconds)

4. Computer Center, CS, NCTU 4 User Connect Time Statistic Script – Requirements (2/2)  Only pipes (cmd | cmd) and backquotes (`cmd`) are allowed  No temporary files or shell variables (except LOG_FILE)  No “&&” “||” “>” “>>” “<“ “;” “&”

5. Computer Center, CS, NCTU 5 User Connect Time Statistic - DEMO  Hint: $ man last

6. Computer Center, CS, NCTU 6 Spamming System – Sendmail  $ sendmail –t < letter  Sample letter  sendmail(8), base64(1) From: =?UTF-8?B?6auY5omLCg==?= To: =?UTF-8?B?5Y6y5a6zCg==?= Subject: =?UTF-8?B?6auY5omL5Y6y5a6z5LiN57Ch5ZauCg==?= Content-Transfer-Encoding: base64 Content-Type: text/plain; charset=utf-8 5L2g5piv6auY5omL5L2g5Y6y5a6zCuaIkeaYr+mCsea4o+S4jeewoeWWrgo=

7. Computer Center, CS, NCTU 7 Spamming System – Requirements (1/3)  $ hw2 [-hv] [-f from_address] [-F from_name] [-s subject] [- c content_file] -t table_file  If neither –f nor –F is provided, use default sender.  Show usage and exit if running with invalid or –h option.  Use –c option to read content from “file” instead of “stdin”.  In –v mode, print out letter instead of sending.  UTF-8 should be supported.  There will be escaped characters in subject and content_file. %i should be replaced by elements in the table_file  Do NOT need to implement fool-proof.

8. Computer Center, CS, NCTU 8 Spamming System – Requirements (2/3)  Table file %1 is recipient’s address %2 is recipient’s name Use “\t” to split columns No specific table size %3 %2 同學您好， 您的 計算機系統管理 學期成績為 %4 分， %5 及格。 若對成績有疑問請直接回信到 ta@nasa.cs.nctu.edu.tw 。 ＳＡ助教關心您！ %1 %2 %3 %4 %5 hchung@cs.nctu.edu.tw 鍾 翔 0156038 99 有 hwchiu@cs.nctu.edu.tw 邱宏瑋 0156521 55 沒有 %3 %2 計算機系統管理學期成績 Content file and subject (contains escaped characters %i) Table file (uses “\t” as delimiter)

9. Computer Center, CS, NCTU 9  hw2.sh -f sata@nasa.cs.nctu.edu.tw -F " 計算機系統管理助教 “ -s "%3 %2 計算機系統管理學期成績 " -c demo_c -t demo_t  http://nasa.cs.nctu.edu.tw/sysadm/hw3/demo_t http://nasa.cs.nctu.edu.tw/sysadm/hw3/demo_t  http://nasa.cs.nctu.edu.tw/sysadm/hw3/demo_c http://nasa.cs.nctu.edu.tw/sysadm/hw3/demo_c  http://nasa.cs.nctu.edu.tw/sysadm/hw3/output http://nasa.cs.nctu.edu.tw/sysadm/hw3/output Spamming System – Requirements (3/3) Sample result Example options

10. Computer Center, CS, NCTU 10 Spamming System – DEMO  Hint  getopt(1)

11. Computer Center, CS, NCTU 11 My Ports Manager – DEMO

12. Computer Center, CS, NCTU 12 My Ports Manager – DEMO (List)

13. Computer Center, CS, NCTU 13 My Ports Manager – DEMO (Manage)

14. Computer Center, CS, NCTU 14 My Ports Manager – DEMO (Manage)

15. Computer Center, CS, NCTU 15 My Ports Manager – DEMO (Manage)

16. Computer Center, CS, NCTU 16 My Ports Manager – DEMO (Manage)

17. Computer Center, CS, NCTU 17 My Ports Manager – DEMO (Manage)

18. Computer Center, CS, NCTU 18 My Ports Manager – DEMO (Install)

19. Computer Center, CS, NCTU 19 My Ports Manager – DEMO (Install)

20. Computer Center, CS, NCTU 20 My Ports Manager – DEMO (Install)

21. Computer Center, CS, NCTU 21 My Ports Manager – DEMO (Install)

22. Computer Center, CS, NCTU 22 My Ports Manager – Requirement (1/2)  Use sudo to add/delete ports  Clean all temp files  Use dialog on Freebsd 9  Fool-proof

23. Computer Center, CS, NCTU 23 My Ports Manager – Requirement (2/2)  Flow List Manage  Choose SEVERAL ports –Show dependency –Required by who –Remove –Exit Install  Prefix –Choose ONE port »By binary »By source »Exit Exit

24. Computer Center, CS, NCTU 24 My Ports Manager – Hint  dialog(1)  ports-mgmt/pkg_tree  pkg_info, pkg_delete, pkg_add  make install clean BATCH=yes  /usr/ports/INDEX-9  xargs

25. Computer Center, CS, NCTU 25 Hand-in  Due & Demo 2012/11/20

26. Computer Center, CS, NCTU 26 Help  IRC channel #nctuNASA on freenode  Newsgroup cs.course.sysadmin  BBS bs2.to board CS-SysAdmin  Email ta@nasa.cs.nctu.edu.tw  Goto CSCC to ask professional 3F!