Monitoring script for the 42 Born2BeRoot project

monitoring.sh

#!/bin/bash

architecture=$(uname -a)
n_cpu=$(grep "physical id" /proc/cpuinfo | wc -l)
n_vcpu=$(grep processor /proc/cpuinfo | wc -l)
mem_use=$(free --mega | awk '$1 == "Mem:" {printf("%d/%d (%.2f%%)"), $3, $2, $3/$2*100}')
disk_use=$(df -m | grep "/dev/" | grep -v "/boot" | \
	awk '{use += $3} {total += $2} END {printf("%d/%dMB (%d%%)\n"), use, total, use/total*100}')
cpu_load=$(vmstat 1 4 | tail -1 | awk '{printf("%d%%"), 100-$15}')
last_boot=$(who -b | awk '{print $3, $4, $5}')
lvm_use=$(lsblk | grep -q lvm && echo "yes" || echo "no")
connect_tcp=$(ss -t | grep ESTAB | wc -l)
users=$(who | wc -l)
network=$(hostname -I | awk '{print $1}')\ $(ip link show | grep link/ether | awk '{print $2}')
sudo_use=$(grep -c "COMMAND=" /var/log/sudo/sudo.log)

echo "  System monitoring  
---------------------
Architecture:        $architecture
CPU's:               $n_cpu
vCPU's:              $n_vcpu
Memory usage:        $mem_use
Disk usage:          $disk_use
CPU load:            $cpu_load
Last boot:           $last_boot
LVM use:             $lvm_use
Connections (TCP):   $connect_tcp
Users logged in:     $users
Network (IPv4, MAC): $network
Sudo:                $sudo_use"

# With escape sequences:

# echo "
# \033[1m  System monitoring  \033[0m
# \033[2m---------------------\033[0m
# \033[0mArchitecture:      \033[1m$architecture
# \033[0mCPU's:             \033[1m$n_cpu
# \033[0mvCPU's:            \033[1m$n_vcpu
# \033[0mMemory usage:      \033[1m$mem_use
# \033[0mDisk usage:        \033[1m$disk_use
# \033[0mCPU load:          \033[1m$cpu_load
# \033[0mLast boot:         \033[1m$last_boot
# \033[0mLVM use:           \033[1m$lvm_use
# \033[0mConnections (TCP): \033[1m$connect_tcp
# \033[0mUsers logged in:   \033[1m$users
# \033[0mNetwork:           \033[1m$network
# \033[0mSudo:              \033[1m$sudo_use
# \033[0m"