Shell Script to Print Good Morning, Good Afternoon, Good Evening and Good Night according to the System Time

A shell script is a computer program designed to be run by the Unix shell, a command-line interpreter. The various dialects of shell scripts are considered to be scripting languages. Typical operations performed by shell scripts include file manipulation, program execution, and printing text. A script that sets up the environment, runs the program, and does any necessary cleanup, logging, etc. is called a wrapper.

In this post, we will write a shell script to print good morning, good afternoon, good evening and good night according to the system time.

INPUT:
none

OUTPUT:
Print one line: the greeting according to the system time

The following is the shell script to print good morning, good afternoon, good evening and good night according to the system time:

h=$(date +"%H")
if [ $h -gt 6 -a $h -le 12 ]
then
echo good morning
elif [ $h -gt 12 -a $h -le 16 ]
then 
echo good afternoon
elif [ $h -gt 16 -a $h -le 20 ]
then
echo good evening
else
echo good night
fi

OUTPUT:

$ good evening

Let us know in the comments if you are having any questions regarding this shell script.

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