Get processes memory usage, from https://linuxhint.com/check_memory_usage_process_linux/

sysmon.sh

#!/bin/bash

printf "%-10s%-15s%-15s%s\n" "PID" "OWNER" "MEMORY" "COMMAND"

function sysmon_main() {
    RAWIN=$(ps -o pid,user,%mem,command ax | grep -v PID | awk '/[0-9]*/{print $1 ":" $2 ":" $4}')

    for i in $RAWIN
    do
        PID=$(echo $i | cut -d: -f1)
        OWNER=$(echo $i | cut -d: -f2)
        COMMAND=$(echo $i | cut -d: -f3)
        MEMORY=$(pmap $PID | tail -n 1 | awk '/[0-9]K/{print $2}')
        printf "%-10s%-15s%-15s%s\n" "$PID" "$OWNER" "$MEMORY" "$COMMAND"
    done
}

sysmon_main | sort -bnr -k3