These are mostly things which I cannot remember, or which I just want to have handy for copying and pasting.
DNS
Flushing the DNS Cache
dscacheutil -flushcache; sudo killall -HUP mDNSResponder
Show DNS Config
Displaying the current resolver configurationscutil --dns
Finding the last Wireless AP and SSID that a Mac connected to:
log show --predicate '(processImagePath contains "configd") && (eventMessage contains "en0: SSID ")' --style syslog --last 1d
KTrace / Strace equivilent
sudo ktrace trace -S -f C3,C4 -s -c <command>
See what is keeping MacOS awake
pmset -g assertions
See what files a process is using / accessing:
sudo fs_usage pid <pid>
A less awful way of looking at logs
log stream --predicate 'process contains "kernel"' --debug --info --style compact
log stream --predicate 'subsystem == "com.apple.network"' --debug --info --style compact
The “Mac Framework” way of fetching content.
nscurl
Stopping Mac powering on when lid opens
- Don't turn on when opening lid, or connecting to power:
sudo nvram BootPreference=%00 - Don't turn on when opening lid:
sudo nvram BootPreference=%01 - Dont torn on when connecting to power:
sudo nvram BootPreference=%02