In Linux shell scripting, direct comparison operators 
like -eq, -ne, -gt, -lt, -ge, and -le are designed for 
integer comparisons. 
To compare decimal numbers (floating-point numbers), 
you need to use external tools that support floating-point
arithmetic.
Here are common methods for comparing decimal numbers in a 
Linux shell script:

1. Using bc (arbitrary precision calculator):
bc is a powerful tool for performing calculations with arbitrary precision, including decimal comparisons.

Código

num1=2.5
num2=1.7

if (( $(echo "$num1 > $num2" | bc -l) )); then
  echo "$num1 is greater than $num2"
else
  echo "$num1 is not greater than $num2"
fi

In this example:

echo "$num1 > $num2" 
sends the comparison expression to bc.
bc -l loads the standard math library, 
enabling floating-point operations.
The result of the comparison 
(1 for true, 0 for false) 
is then used in the (( )) arithmetic expansion 
for evaluation.