Command not found error

Course Support Linux Basics For Robotics
1

#!/bin/bash

ARG1=$1

if ["$ARG1" == “small_square”]; then

echo "Drawing small square"

rosrun linux_exam small_square.py

elif ["$ARG1" == “medium_square”]; then

echo "Drawing medium square"

rosrun linux_exam medium_square.py

elif ["$ARG1" == “big_square”]; then

echo "Drawing big square"

rosrun linux_exam big_square.py

fi

everytime I try to run the above bash script, it gives me this error:

./task2.sh: line 8: [big_square: command not found
./task2.sh: line 12: [big_square: command not found
./task2.sh: line 16: [big_square: command not found

Any suggestion to solve this will be highly appreciated (I have been stuck to this issue for too long).

Cheers.

2

Hello dsdjoy4,

The problem is the lack of space before the “$ARG1” and after the “small_square”. Press the space bar just once as shown in the code below and the problem would be solved. Cheers.

#!/bin/bash

ARG1=$1

if [ "$ARG1" == "small_square" ]; then

    echo "Drawing small square";

    rosrun linux_exam small_square.py

elif [ "$ARG1" == "medium_square" ]; then

    echo "Drawing medium square";

    rosrun linux_exam medium_square.py

elif [ "$ARG1" == "big_square" ]; then

    echo "Drawing big square";  

    rosrun linux_exam big_square.py

fi
3 Likes
3

Do this for small, medium and big square

1 Like
4

Thank you for the reply Yelaina. Really appreciate it.
I have now tried putting one space character, unfortunately still same error:

./task2.sh: line 8: [big_square: command not found
./task2.sh: line 12: [big_square: command not found
./task2.sh: line 16: [big_square: command not found

5

@dsdjoy4, I dont think you got what I explained. Try running the code I pasted and then carefully compare it with your code and you would see the error I am referring to. Cheers.

2 Likes
6

Oh I see, Thank you so much @Yelaina. Big Help! : )

2 Likes
7

@dsdjoy4 …You are welcome!

1 Like