判断某一天是否是某月的最后一天

if [ $(date +%e) -eq $(cal|xargs|awk '{print $NF}') ]; then

echo  "last day"

else

echo "not last day"

fi

if [ "$(date +%m)" != "$(date +%m -d "+1day")" ]; then

echo  "last day"

else

echo "not last day"

fi

if [ "01" = "$(date +%d -d "+1day")" ]; then

echo  "last day"

else

echo "not last day"

fi