RHEL/CentOS/AlmaLinux

# Install basic tools
sudo yum install epel-release -y
sudo yum install htop iftop iotop -y

# Install Netdata
bash <(curl -Ss https://my-netdata.io/kickstart.sh)

Key metrics path: /proc/meminfo, /proc/stat

Ubuntu/Debian

# Install monitoring toolkit
sudo apt update
sudo apt install htop sysstat dstat -y

# For CloudLinux users:
yum install cagefs --enablerepo=cloudlinux-updates-testing

Check /var/log/syslog for system events

CloudLinux Specific

# LVE stats monitoring
yum install lve-stats -y
lveinfo --by-fault=mem

# KernelCare patch monitoring
kc-patch-info

Use cloudlinux-stat for resource limits

Universal Tools

# Quick system check
w # Show logged-in users
df -h # Disk space
free -m # Memory
ss -tulnp # Network connections

# For dedicated servers:
nmon # IBM's system monitor