information %ram, %cpu + nbr cpu + nom actuel (ubuntu/debian)

fetch.sh

#!/bin/bash

display-frame() {
	TERMW=$(tput cols)
	TERMH=$(tput lines)
	BUFFER=""

	print-line
	print-line "\t\e[1mUser:\e[0m $(whoami)"
	print-line "\t\e[1mKernel:\e[0m $(uname -sr)"
	print-line "\t\e[1mCPU:\e[0m $(nproc) x$(get-cpu-name)"
	#show-ip
	print-line
	#show-errors

	# 7 lines on top, 8 line at bottom
	TOJUMP=$((TERMH - 15))
	for (( i=0; i < $TOJUMP; i++ )) do
		print-line 
	done

	show-disk
	print-line
	show-ram
	print-line
	show-cpu

	tput cup 0 0
	echo -ne "$BUFFER"
}

get-cpu-name() {
	grep "model name" /proc/cpuinfo | cut -d: -f2 | head -1
}

show-ip() {
	MYIP=$(cat $IPFILE)

	if [ -z $MYIP ];then
		print-line "\t\e[1mCurrent IP:\e[0m Pinging ifconfig.me ..."
	else
		print-line "\t\e[1mCurrent IP:\e[0m $MYIP"
	fi
}

# $1: file where address will be saved
show-ip-background() {
	curl ifconfig.me 2>/dev/null 1>"$1"
}

show-errors() {
	ERRORS=$(journalctl -k -p crit -o cat --no-pager)

	if [ -z "$ERRORS" ]; then
		print-line "\t\e[32mNo critical errors at boot\e[0m"
	else
		print-line "\t\e[1m\e[31mThere was critical errors at boot !\e[0m"
	fi
}

show-disk() {
	TOTAL=$(df -k /home | tail -1 | awk '{print $2}')
	USED=$( df -k /home | tail -1 | awk '{print $3}')

	SEG1=$(($USED * $TERMW / $TOTAL))
	SEG2=$(($TERMW - $SEG1))

	print-line "\t\e[1m/home:\e[0m $(human-units $USED) / $(human-units $TOTAL)"
	draw-bar $SEG1 31
	draw-bar $SEG2 37
	draw-bar-end
}

show-ram() {
	TOTAL=$(grep MemTotal     /proc/meminfo | grep -Po '\d+')
	FREE=$( grep MemFree      /proc/meminfo | grep -Po '\d+')
	AVAIL=$(grep MemAvailable /proc/meminfo | grep -Po '\d+')

	USED=$(($TOTAL - $AVAIL))
	CACHED=$(($AVAIL - $FREE))

	SEG1=$(($USED * $TERMW / $TOTAL))
	SEG2=$(($CACHED * $TERMW / $TOTAL))
	SEG3=$(($TERMW - $SEG1 - $SEG2))

	print-line "\t\e[1mRAM:\e[0m $(human-units $USED) / $(human-units $TOTAL)"
	draw-bar $SEG1 31
	draw-bar $SEG2 90
	draw-bar $SEG3 37
	draw-bar-end
}

show-cpu() {
#	show-cpu-background $CPUFILE &

	print-line "\t\e[1mCPU:\e[0m $CPULOAD%"

	LOAD=$(echo $CPULOAD | awk '{print int($1)}')
	SEG1=$(($LOAD * $TERMW / 100))
	SEG2=$(($TERMW - $SEG1))

	draw-bar $SEG1 31
	draw-bar $SEG2 37
	#draw-bar-end
}

# $1: delay (seconds) between the 2 queries
get-cpu-load() {
	top -bn2 -d $1 | grep Cpu | tail -1 | sed s/,/./g | awk '{print $2 + $4 + $6}'
}

# $1: input in kB
human-units() { 
	if [ $1 -lt 1000 ]; then echo "${1}KB"; return; fi
	if [ $1 -lt 1000000 ]; then
		echo $1 | awk '{printf "%.1fMB", $1 / 1000}'
		return;
	fi
	echo $1 | awk '{printf "%.1fGB", $1 / 1000000}'
}

# $1: length of the bar
# $2: bash color code (ex. 33 for red)
draw-bar() {
	# %.0s will print 0 characters of a string
	# \u2588 is a "plain block" unicode character
	# printf will loop the template string until there are no more args
	# seq 1 n will eval to n strings
	[[ $1 > 0 ]] && BUFFER+="\e[${2}m$(printf "%.0s\u2588" $(seq 1 $1))\e[0m"
}

draw-bar-end() {
	BUFFER+="\n"
}

# $1: content of the line
print-line() {
	LINE=$(printf "%.0s " $(seq 1 $TERMW))
	BUFFER+="$LINE\r$1\n"
}

### MAIN ###
clear

IPFILE="/tmp/fetch-ip"
touch $IPFILE
show-ip-background $IPFILE &

CPULOAD=$(get-cpu-load 0)

for (( ;; )) do
	display-frame
	CPULOAD=$(get-cpu-load 1)
done