macOS

version info

uname -a

system_profiler SPSoftwareDataType

shell

# get shell
echo $0

# restart shell
. ~/.sh_profile

env vars

printenv
echo "$PATH"

services

sudo launchctl list

memory

cat /sys/fs/cgroup/memory/memory.limit_in_bytes

networking

ipconfig getifaddr en1  # private ip, last inet usually

ports

sudo lsof -PiTCP -sTCP:LISTEN

finder

Cmd + Shift + .

misc

# copy to clipboard
pbcopy < ~/.ssh/id_rsa.pub

tar -cvf file.tar <path_to_directory>
tar -xvzf file.tar