76 lines
1.8 KiB
Bash
Executable File
76 lines
1.8 KiB
Bash
Executable File
#! /bin/sh
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RED="\e[31m"
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GREEN="\e[32m"
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YELLOW="\e[33m"
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CYAN="\e[36m"
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NC="\e[0m"
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trap "echo '${CYAN}System Monitor interrupted.${NC}'; exit 1" INT TERM
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echo
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echo
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echo
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# Cache in tmpfs to improve speed and reduce SSD load
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cache=/tmp/cpu-script-cache
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rm /tmp/cpu-script-cache 2>/dev/null
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while true; do
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# CPU
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cpu_stats=$(awk '/^cpu / {print $2 + $3 + $4 + $5, $5}' /proc/stat)
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if [ ! -f "$cache" ]; then
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echo "$cpu_stats" >"$cache"
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cpu_color=$CYAN
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usage="--"
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else
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prev_stats=$(cat "$cache")
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total=$(echo "$prev_stats" | awk '{print $1}')
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prev_idle=$(echo "$prev_stats" | awk '{print $2}')
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curr_total=$(echo "$cpu_stats" | awk '{print $1}')
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curr_idle=$(echo "$cpu_stats" | awk '{print $2}')
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total_diff=$((curr_total - total))
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idle_diff=$((curr_idle - prev_idle))
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if [ "$total_diff" -eq 0 ]; then
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usage=0 # Avoid division by zero
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else
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usage=$((100 * (total_diff - idle_diff) / total_diff))
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fi
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if [ "$usage" -lt 50 ]; then
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cpu_color=$GREEN
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elif [ "$usage" -lt 70 ]; then
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cpu_color=$YELLOW
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else
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cpu_color=$RED
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fi
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fi
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# MEMORY
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mem_info=$(free | awk '/Mem:/ {print $2, $3}')
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set -- $mem_info
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total=$1
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used=$2
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percent=$(awk "BEGIN {printf \"%.0f\", ($used/$total)*100}")
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mem_total=$(free -h | awk '/Mem:/ {print $2}')
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mem_used=$(free -h | awk '/Mem:/ {print $3}')
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if [ "$percent" -le 60 ]; then
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mem_color=$GREEN
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elif [ "$percent" -le 80 ]; then
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mem_color=$YELLOW
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else
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mem_color=$RED
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fi
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printf "\033[4A"
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echo "============================="
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echo " ${cpu_color}${usage}%${NC} "
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echo " ${mem_used} / ${mem_total} (${mem_color}${percent}%${NC}) "
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echo "============================="
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echo "$cpu_stats" >"$cache"
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sleep 2
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done
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