Add new script

01_bash/calculate_workhours_pc.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+# Cabecera
+printf "%-25s %-25s %-20s\n" "Encendido" "Apagado" "Tiempo activo"
+printf "%-25s %-25s %-20s\n" "----------" "--------" "--------------"
+
+# Usamos `tac` para invertir el orden de `last -x`
+last -x | tac | awk '
+/reboot/ {
+  boot = $6" "$7" "$8
+  next
+}
+/shutdown/ && boot != "" {
+  shut = $6" "$7" "$8
+  cmd1 = "date -d \""boot"\" +%s"; cmd1 | getline t1; close(cmd1);
+  cmd2 = "date -d \""shut"\" +%s"; cmd2 | getline t2; close(cmd2);
+  delta = t2 - t1
+  if (delta > 0) {
+    h = int(delta / 3600)
+    m = int((delta % 3600) / 60)
+    s = delta % 60
+    printf "%-25s %-25s %02d:%02d:%02d\n", boot, shut, h, m, s
+    total += delta
+  }
+  boot = ""
+}
+END {
+  h = int(total / 3600)
+  m = int((total % 3600) / 60)
+  s = total % 60
+  printf "\n%-51s %02d:%02d:%02d\n", "Tiempo total encendido:", h, m, s
+}'