Local Process

# show all localhost processes
lsof -i @localhost 

# ps
ps # show active processes

# show all processes matching process_name
ps x | grep process_name 

# show active process_num on a port_num
lsof -i :port_num

# find process_number by port number
lsof -i :8001
fuser 8001/tcp

Foreground

foreground = bring background cli run to show up in cli

fg

Kill Process

#Kill the specified process_number
pkill process_number

# Force kill the process_number
kill -9 process_number

Network Level Operations

# download a file from the internet
wget http://sample.com/sample-menu.php

Find local machine IP Address

ipconfig getifaddr en0
ipconfig getifaddr en1

Get localhost ip

ping localhost

telnet localhost

Machine Level Operations

# free

free
## check for memory RAM on your system
## to check the memory statics of the Linux operating system.

# In MacOS, the counterpart would be:
vm_stat