Bash examples

bash builtins

if command

Greetings

#!/bin/bash
#Uncomment HOUR=`date +%H` when using for real
#HOUR=`date +%H`
#
#HOUR=$1 only for testing purposes.....
HOUR=$1
if test $HOUR -le 7
  then
    echo "You are early go home"
  else if test $HOUR -le 8
         then
           echo "You are early"
         else if test $HOUR -lt 12
                then
                  echo "Good morning, Vietnam"
                else if test $HOUR -lt 16
                       then
                         echo "Good evening"
                     fi
              fi
       fi
fi

while

count example

#!/bin/bash
COU=1
while test $COU -lt 10000
do
  echo -en "COU = $COU\r"
  COU=`expr $COU + 1`
done