diff --git a/.bashrc b/.bashrc
index 8d54109..28afacc 100644
--- a/.bashrc
+++ b/.bashrc
@@ -160,11 +160,28 @@ else
   os_system=$(echo ${os_system})
 fi
 kernel=$(uname -r)
-uptime=$(uptime 2> /dev/null | tr -s " " | cut -d "," -f 1)
-if [ -z "${uptime}" ] ; then
-  uptime="Unknown"
+if [ -f /proc/uptime ] ; then
+  uptime_sec=$(cat /proc/uptime)
+  uptime_sec_cut=$(echo ${uptime_sec} | tr -s " " | cut -d " " -f 1 | cut -d "." -f 1)
+  uptime_min=$(expr ${uptime_sec_cut} / 60)
+  if [ ${uptime_min} -le 59 ] ; then
+    uptime="${uptime_min}min"
+  else
+    uptime_hour=$(expr ${uptime_min} / 60)
+    if [ ${uptime_hour} -le 23 ] ; then
+      uptime="${uptime_hour}h"
+    else
+      uptime_day=$(expr ${uptime_hour} / 24)
+      uptime="${uptime_day}d"
+    fi
+  fi
 else
-  uptime=$(echo ${uptime})
+  uptime=$(uptime 2> /dev/null | tr -s " " | cut -d "," -f 1)
+  if [ -z "${uptime}" ] ; then
+    uptime="Unknown"
+  else
+    uptime=$(echo ${uptime})
+  fi
 fi
 #shell="5.1.4" # Run bash --version
 shell=$(bash --version | head -1 | tr -s " " | cut -d " " -f 4 | cut -d "(" -f 1 | cut -d "-" -f 1)
diff --git a/.config/fish/config.fish b/.config/fish/config.fish
index 13dd9d5..56c97bf 100644
--- a/.config/fish/config.fish
+++ b/.config/fish/config.fish
@@ -28,7 +28,22 @@ else
   set os_system (uname -o)
 end
 set kernel (uname -r)
-if test -f /usr/bin/uptime
+if test -f /proc/uptime
+  set uptime_sec (cat /proc/uptime)
+  set uptime_sec_cut (echo $uptime_sec | tr -s " " | cut -d " " -f 1 | cut -d "." -f 1)
+  set uptime_min (expr $uptime_sec_cut / 60)
+  if test "$uptime_min" -le "59"
+    set uptime {$uptime_min}min
+  else
+    set uptime_hour (expr $uptime_min / 60)
+    if test "$uptime_hour" -le "23"
+      set uptime {$uptime_hour}h
+    else
+      set uptime_day (expr $uptime_hour / 24)
+      set uptime {$uptime_day}d
+    end
+  end
+else if test -f /usr/bin/uptime
   set uptime (uptime | tr -s " " | cut -d "," -f 1)
   set uptime (echo {$uptime} | cut -f 2)
 else
diff --git a/.zshrc b/.zshrc
index 9bb8f96..86d6036 100644
--- a/.zshrc
+++ b/.zshrc
@@ -252,11 +252,28 @@ echo ""
 echo -e -n "\e[32m# Preparing to start \e[0m\e[35mzsh\e[0m \e[32mshell...\e[0m"
 os_system=$(uname -o)
 kernel=$(uname -r)
-uptime=$(uptime 2> /dev/null | tr -s " " | cut -d "," -f 1)
-if [ -z "${uptime}" ] ; then
-  uptime="Unknown"
+if [ -f /proc/uptime ] ; then
+  uptime_sec=$(cat /proc/uptime)
+  uptime_sec_cut=$(echo ${uptime_sec} | tr -s " " | cut -d " " -f 1 | cut -d "." -f 1)
+  uptime_min=$(expr ${uptime_sec_cut} / 60)
+  if [ ${uptime_min} -le 59 ] ; then
+    uptime="${uptime_min}min"
+  else
+    uptime_hour=$(expr ${uptime_min} / 60)
+    if [ ${uptime_hour} -le 23 ] ; then
+      uptime="${uptime_hour}h"
+    else
+      uptime_day=$(expr ${uptime_hour} / 24)
+      uptime="${uptime_day}d"
+    fi
+  fi
 else
-  uptime=$(echo ${uptime})
+  uptime=$(uptime 2> /dev/null | tr -s " " | cut -d "," -f 1)
+  if [ -z "${uptime}" ] ; then
+    uptime="Unknown"
+  else
+    uptime=$(echo ${uptime})
+  fi
 fi
 #shell="5.8" # Run zsh --version
 shell=$(zsh --version | cut -d " " -f 2)