Credits : Dennis Wilson - Professor @ ISAE-SUPAERO (2024) | Christophe Huet - Data-analyst @ EasyMile (2024)
Question and data repository for the 2024 Capture the Flag.
1 | Where is the curl executable located? Some systems vary, if your answer is incorrect, try a common alternative.
2 | What is the linux command used for reading manuals?
3 | Where is the less executable located?
4 | What is the key for scrolling down by one half of screen size in less?
5 | What is the longer name of the -K flag to curl?
6 | What is the cp command flag allowing for copying directories?
7 | What is the ls command flag used for human-readable output?
8 | What is the mv command flag which will interactively prompt before overwriting files?
9 | What is the cat command flag which shows line numbers?
10 | If the variable STRING is set to banana, what does the command echo ${STRING:4}$ return?
11 | If the variable a is set to 3 and b is set to 4, what does the command if [[ $a -le $b ]]; then echo $a; else echo $b; fi return?
12 | If the variable p is set to (3 1 4 1 5 9), what does the command echo $((${p[0]} * ${p[2]})) return?
13 | What is the grep command flag used to select non-matching lines?
14 | What is the longer name of the -c flag to grep?
15 | How many lines are in file_a.txt?
16 | What does the command head -n 10 file_a.txt | wc -l return?
17 | How many words in file_a.txt start with the letter "d"?
18 | How many words are in file_a.txt that contain only 4 letters?
19 | What is the last word in file_b.txt?
20 | What is the line number of the word "helicopter" in file_b.txt?
21 | How many characters are in file_c.txt?
22 | How many words contain "croissant" inside them in file_c.txt?
23 | What word is at the same line in file_c.txt as the word "sheep" is in file_a.txt?
24 | What is the second word in file_c.txt which contains the letter x?
25 | What is the size of file_a.txt in bytes?
26 | What is the command to display files in the current directory?
27 | What is the find command flag that limits the search to a certain depth in directories?
28 | What command would you use to display all currently running processes?
29 | What is the environment variable used to define the location of executable programs?
30 | What is the flag for diff that ignores case differences?