Error of logica shell script

Question

I want to print on the screen a message according to the current time of the day but it always falls on Is, what would be the mistake? It’s 1:00 and I don’t understand what the mistake is.

Answer 1

The following comparison is unnecessary and will never be true:

elif [ "$HORA" -ge 12 -a "$HORA" -lt 06 ]
then
    echo "Boa Noite!";
else

Look at the solution:

#!/bin/bash

HORA=$(date +%H)

if [ "$HORA" -ge 6 -a "$HORA" -lt 12 ]
then
     echo "Bom dia!";
elif [ "$HORA" -ge 12 -a "$HORA" -lt 18 ]
then
    echo "Boa tarde!";
else
    echo "Boa noite!";
fi

Answer 2

try that, but I’m not so sure.

 #!/bin/bash

 clear
 HORA=$(date +%H)

 if [ "$HORA" -gt 05 -a "$HORA" -lt 12 ]
 then
     echo "Bom dia";

 elif [ "$HORA" -gt 11 -a "$HORA" -lt 18 ]
 then
     echo "Bom tarde";

 elif [ "$HORA" -gt 17 -o "$HORA" -lt 6 ]
 then
     echo "Bom noite";
 fi

I think the problem is right now, if you’re running this at night, there’s no way the time is over 18 and under 6