LinuxQuestions.org - Some practice question

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Some practice question - working with servers

Hello everyone,
I would like to have some help with some questions I encountered lately:

1. Write a command that shows how many hops you have between your machine and google.com.

2. Using this API: http://api.open-notify.org/
a - Write a command that shows how many people are in space in any moment.
b - Write a command that prints the current longitude of the international space station.

3. Using this: https://raw.githubusercontent.com/Bi...r/pokedex.json
a - write a command that prints the number of Pokemons available in Pokedex.

b - Write a command that prints all the height of the Pokemons from the lowest to the tallest.

c - Who is the tallest Pokemon?

4. Using this: https://ipapi.co/<ip>/json
a - write a command that prints the country where the server of which one of the following addresses is located: amazon.com, amazon.co.uk, amazon.de, amazon.co.jp

b - Are those servers are located in their country?

Thanks

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Cross-posts @linux.org and @SO (closed).

Nice APIs they have out there. I didn't count the lines of traceroute output as this would be too easy, but did all the other exercises with curl and jq. See below (I printed only the three shortest and the tallest Pokemon):

Code:

#!/bin/sh

echo = 2 =

api=http://api.open-notify.org

echo == 2a ==

echo 'Q: How many people are in space now?'

echo  "A: $(curl -s $api/astros.json|jq .number)"

echo == 2b ==

echo 'Q: Current longitude of the ISS?'

echo "A: $(curl -s $api/iss-now.json|jq -r .iss_position.longitude)"



echo = 3 =

api=https://raw.githubusercontent.com/Biuni/PokemonGO-Pokedex/master/pokedex.json

echo == 3a ==

echo 'Q: Number of Pokemons available in Pokedex?'

echo "A: $(curl -s $api|jq '.pokemon|length')"



echo == 3b ==

echo 'Q: Heights of all Pokemons from the lowest to the tallest'

curl -s $api|

  jq -r '.pokemon|sort_by(.height)[]|"\(.name) is \(.height) tall"'|

  sed -n '1,3p;$p;3a...'



echo == 3c ==

echo 'Q: Who is the tallest Pokemon?'

curl -s $api|

  jq -r '.pokemon|max_by(.height)|"A: \(.name) is the tallest"'



echo = 4 =

api=https://ipapi.co

echo == 4a ==

echo 'Q: What country the following addresses are located in?'

for cc in com co.uk de co.jp

do

  for ip in $(host -tA amazon.$cc|awk '$0=$NF')

  do

    printf '%-13s %17s is in %s\n' \

      "amazon.$cc" "($ip)" "$(curl -s $api/$ip/json|jq -r .country_name)"

  done

done



echo == 4b ==

echo 'Q: Are those servers located in their country?'

for c in US:com GB:co.uk DE:de JP:co.jp

do

  cc=${c#*:}

  for ip in $(host -tA amazon.$cc|awk '$0=$NF')

  do

    printf '%-13s %17s is %s\n' \

      "amazon.$cc" "($ip)" \

      "$(curl -s $api/$ip/json|

            jq -r 'if .country=="'"${c%:*}"'" then "at home" else "abroad" end')"

  done

done

Quote:

Originally Posted by airline33 (Post 6300936)

1. Write a command that shows how many hops you have between your machine and google.com.

Code:

traceroute www.google.com | wc -l

@dugan. Off by one. The first line is the header, at least in my version of traceroute.