Retrieve and display information about CPU utilization, memory consumption, and network listeners.

show_proc_and_mem_info.sh

#!/usr/bin/env bash
# Record process and memory information

function log_output() {
  local lines_to_print="$1"
  while IFS= read -r line_to_print; do
    echo "[$(date -Ins --utc)] ${line_to_print}"
  done <<< "${lines_to_print}"
}

log_output '===== BEGIN PROC & MEM INFO GATHERING ====='

log_output 'OVERALL MEMORY METRICS'
log_output "$(free --si --total -h)"

# Get info about per-process resource utilization
log_output "TOP CPU CONSUMERS:"
log_output "$(top -s -c -b -n 1 -w 512 -o '%CPU' | head -n 21)"
log_output "TOP MEMORY CONSUMERS:"
log_output "$(top -s -c -b -n 1 -w 512 -o '%MEM' | head -n 21)"

log_output 'NETWORK LISTENERS'
log_output "$(netstat -tulpn)"

log_output '===== END OF PROC & MEM INFO GATHERING ====='