A handy shell script to use as a starting point if you need to setup something that only fires on x days of the week.

days.sh

#!/bin/bash
###############################################################################
# A handy starting point if you need to setup something that only fires on x  #
# days of the week.                                                           #
###############################################################################

DAYNUM=$(date +"%u")

if [ $DAYNUM -eq 1 ]; then
  echo "It's Monday"
elif [ $DAYNUM -eq 2 ]; then
  echo "It's Tuesday"
elif [ $DAYNUM -eq 3 ];  then
  echo "It's Wednesday"
elif [ $DAYNUM -eq 4 ];  then
  echo "It's Thursday"
elif [ $DAYNUM -eq 5 ];  then
  echo "It's Friday"
elif [ $DAYNUM -eq 6 ];  then
  echo "It's Saturday"
elif [ $DAYNUM -eq 7 ];  then
  echo "It's Sunday"
else
  echo "I have no idea"
fi

days2.sh

#!/bin/bash
###############################################################################
# A handy starting point if you need to setup something that only fires on x  #
# days of the week.                                                           #
###############################################################################

DAYNUM=$(date +"%u")

if [ $DAYNUM -eq 1 ]; then
  echo "It's Monday"
elif [ $DAYNUM -eq 2 ]; then
  echo "It's Tuesday"
elif [ $DAYNUM -eq 3 ];  then
  echo "It's Wednesday"
elif [ $DAYNUM -eq 4 ];  then
  echo "It's Thursday"
elif [ $DAYNUM -eq 5 ];  then
  echo "It's Friday"
elif [ $DAYNUM -eq 6 ] || [ $DAYNUM -eq 7 ];  then
  echo "It's the weekend!"
else
  echo "I have no idea"
fi