Added life-left script

life/left.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+
+MINUTE=60
+HOUR=$(($MINUTE * 60))
+DAY=$(($HOUR * 24))
+MONTH=$(($DAY  * 30))
+YEAR=$(($DAY * 365))
+
+if [[ $# < 2 ]]; then
+    echo "Usage: $0 <birthdate> <age>"
+    exit
+fi
+
+print_lifetime() {
+    future=$(date +%s -d "$1 + $2 years")
+    epoch=$(($future - $(date +%s)))
+
+    echo "Seconds until $2 years old: $epoch"
+    echo "Minutes until $2 years old: $(($epoch / $MINUTE))"
+    echo "Hours until $2 years old: $(($epoch / $HOUR))"
+    echo "Days until $2 years old: $(($epoch / $DAY))"
+    echo "Months until $2 years old: $(($epoch / $MONTH))"
+    echo "Years until $2 years old: $(($epoch / $YEAR))"
+}
+
+
+print_lifetime "$1" "$2"