(figure from "Starting Forth")
- 從 /var/tmp/exercise-one 找出含有你帳號的檔案
- 每人的帳號會出現三次, 因此極大機率會出現在三檔案中
- 將找到的檔案名字寫到一個檔案中, 每個名字一行.
如為 /var/tmp/exercise-one/Sam/likes/a-duck
則只需輸入 Sam/likes/a-duck 即可. 注意大小寫.
此檔案必須置於 ~/unix-1132/exer1 底下. - 編輯器可用 joe, nano, pico
- deadline: 2025/Feb/26, 00:05 am
- 從 /var/tmp/exercise-two 目錄底下找出自己的目錄及檔案,
並複製到 ~/unix-1132/exer2 下. 如果有以下目錄及檔案/var/tmp/exercise-two/Bob/has-bought/a-cow /var/tmp/exercise-two/Bob/has-bought/a-deer /var/tmp/exercise-two/Bob/has-bought/a-dog /var/tmp/exercise-two/David/is/a-tiger /var/tmp/exercise-two/David/is/a-tiger/fun /var/tmp/exercise-two/David/is/a-tiger/is /var/tmp/exercise-two/David/is/a-tiger/it
則在你的 exer2 下建立如下對應的結構.~/unix-1132/exer2 |---Bob | `---has-bought | |---a-cow | |---a-deer | `---a-dog `---David `---is `---a-tiger |---fun |---is `---it - 注意: 若是檔案的話, 內容必須一樣, 也就是說要用複製的.
- deadline: 2025 March 05 , 00:05 am
在 ~/unix-1132/exer3 建出一個目錄結構, 與下圖一致.
- 有框的為目錄, 其餘為 file.
- 檔案若在 /var/tmp/exercise-three 下可以找到, 則從其處複製, 若找不到, 則為一空檔案.
- 若為 hard link, 則新建出的檔案間的關係也是 hard link.
- 若為 symbolic link, 則新建出的檔案間的關係也是 symbolic link,
Use a relative pathname to build a symbolic link. - deadline: 2025 March 12, 00:05 am
- 從 /var/tmp/exercise-four 找出含有你帳號的檔案或者是檔名含有你帳號的檔案.
- 每人的帳號會出現三次, 因此極大機率會出現在三檔案中
- 將找到的檔案名字寫到一個檔案中, 每個名字一行.
如為 /var/tmp/exercise-four/Sam/likes/go-go-s108321001
則只需輸入 Sam/likes/go-go-s108321001 即可. 注意大小寫. - 此檔案必須置於 ~/unix-1132/exer4 底下.
- 檔案權限需設為 -r--rw-r--
- deadline: 2025 March 19, 00:05 am
- 請善用 find, grep 等指令.
- 建立二個執行檔, 名為 do-at, do-cron
- 每個執行檔的第一個指令須為 date.
- 每個執行檔最少包含二個指令
- 用編輯器建立檔案, 再用 chmod 切換執行的權限.
- 用 at 在 2025/Mar/26, 03:00 --- 05:00 執行 do-at 一次, 執行的輸出須 轉向到檔案 output-at.
- 用 crontab 設定在 2025/Mar/26, 01 至 05 這五個小時內, 每小時 執行 do-cron 二次. 執行的輸出須轉向到檔案 output-cron,
- crontab 的設定請用一行完成.
- at 及 crontab 所需的程式及輸出檔案皆放在 ~/unix-1132/exer5 下.
- 注意作業要求的檔名, 不符規定者將扣分.
- at 及 crontab 的設定須在 2025/Mar/26, 00:05 前完成.
- Write a bash program to calculate the sum of a sequence
- The sequence is defined by two numbers a,b.
The sequence contains the numbers in [a,b] which are neither multiple of 2, 3, nor 7. - Your program should check the number of arguments.
- Your program should be executable.
- For example:
$ ls -l total 4 -r-xr--r-- 1 klim sys 290 Apr 15 19:57 ex6-sum.sh* $ ./ex6-sum.sh ./ex6-sum.sh a b $ ./ex6-sum.sh 1 5 6 $ ./ex6-sum.sh 1 6 6 $ ./ex6-sum.sh 1 9 6 $ ./ex6-sum.sh 1 11 17 $ ./ex6-sum.sh 12 11 0 $ - Your program should put under ~/unix-1132/exer6
- deadline: 2025 Apr 23, 00:05 am
- Write a bash program to count the occurrence of first argument.
- The number of argument should be exactly one.
- The input is from the stdin.
- For each word (separated by white spaces) in the input, check if the argument occurs in the word.
- Report the number of occurrence.
- For example:
$ cat IN Time for dinner! Time for lunch and it is time to go shopping. time to sleep. $ $ ./ex7-count.sh ./ex7-count.sh name $ ./ex7-count.sh time < IN time = 2 $ ./ex7-count.sh ime < IN ime = 4 $ ./ex7-count.sh is < IN is = 1 $ ./ex7-count.sh for < IN for = 2 $ ./ex7-count.sh '.ime' < IN .ime = 4 $ - This exercise is a practice for expr. Do NOT use grep.
- Your program should put under ~/unix-1132/exer7
- deadline: 2025 Apr 30, 00:05 am
- Write a bash program which extracts information either from
stdin or files.
- A list of words which appear in the line containing the keyword are collected. But the words which match the keywords are excluded.
- The words are merged, sorted and printed in a single line.
- This exercise is for practicing combining programs with pipes, so grep and sort must be used at least once respectively.
- If your program uses temporary files, make sure their pathnames are right. Do not forget to remove them after execution.
- Your program should be executable.
- For example:
$ ./ex8-extract.sh usage: ./ex8-extract.sh keyword [file] .... $ $ ./ex8-extract.sh hi hi it is good to see you ohio aloha damn i missed it aloha good is it see to you $ $ cat ex8-in-a oak is not klim klim is good ok it is fine $ $ ./ex8-extract.sh no < ex8-in-a is klim oak $ $ ./ex8-extract.sh 'o.*k' < ex8-in-a fine is is it klim not $ $ cat ex8-in-b 192390 klim klim tooyoung ok it is fine $ $ ./ex8-extract.sh 'o.*k' ex8-in-a ex8-in-b fine fine is is is it it klim not $ - Put your program under ~/unix-1132/exer8.
- deadline: 2025 May 07, 00:05 am
- Create an awk script which calculates the sum for each section.
- Find the '$$$' in input. Each line containing '$$$' is a separator.
- The separators divide the input into sections.
- Try to sum the numbers appeared in each section.
- Note: the line with separator is not counted.
- If no number occurred, generate no output.
- For example:
--------prompt--> cat IN-9a I got $100. I got 200. oh! 300 oh so much $$$ another 10 $$ another 100 oh $$$$$$$ too much 100000 --------prompt--> --------prompt--> cat IN-9b oh so much $$$$$$$ another 10 another 100 $$$ klim is not milk $$$ 0 $$$ 200 is too good oh $$$$$$$ --------prompt--> --------prompt--> ./ex9-sum.awk IN-9a 300 110 100000 --------prompt--> --------prompt--> ./ex9-sum.awk IN-9b 110 0 200 --------prompt--> - Put your program under ~/unix-1132/exer9.
- deadline: 2025 May 14, 00:05 am
- Create an awk script which calculates the average for each user.
- For example:
$ cat IN-10 # this is a comment joejoejoe 10 20 30 #this is also a comment OAK -999 10 # 10000 joeJOE 2000 oak 10 milk 1000 # 2000 $ ./ex10.awk IN-10 OAK = -326.33 MILK = 1000.00 JOEJOE = 515.00 $ - Beware of the comment. You have to remove comments first.
A comment is beginned with a '#' and extends to the end of line. - Each line, if it is not a comment line, begins with a name, followed by numbers.
- The name are case-insensitive and only first 6 characters are significant.
- The average should be printed with two digits after the dot.
- Put your program under ~/unix-1132/exer10.
- deadline: 2025 May 28, 00:05 am