= MacOS misc

==Network
Disable IPv6:
  sudo networksetup -listallnetworkservices # get names to use below
  
  sudo networksetup -setv6off Ethernet
  sudo networksetup -setv6off Wi-Fi
  #...

Show DNS:
  scutil --dns | grep nameserver
 
==Mac startup key combinations
https://support.apple.com/en-us/HT201255

Key combinations for an Intel-based Mac

* Command (⌘)-R: Start up from the built-in macOS Recovery system. Or use Option-Command-R or Shift-Option-Command-R to start up from macOS Recovery over the internet. macOS Recovery installs different versions of macOS, depending on the key combination you use. 
* Option (⌥) or Alt: Start up to Startup Manager, which allows you to choose other available startup disks or volumes. 
* Option-Command-P-R: Reset NVRAM or PRAM.
* Shift (⇧):  Start up in safe mode. 
* D: Start up to the Apple Diagnostics utility. Or use Option-D to start up to this utility over the internet.
* N: Start up from a NetBoot server, if your Mac supports network startup volumes. To use the default boot image on the server, press and hold Option-N instead. 
* Command-S: Start up in single-user mode. Disabled in macOS Mojave or later.
* T: Start up in target disk mode.
* Command-V: Start up in verbose mode. 
* Eject (⏏) or F12 or mouse button or trackpad button: Eject removable media, such as an optical disc.

==Users

List user accounts :\\
https://4it.com.au/kb/article/list-user-accounts-mac-osx-using-terminal-command-line/
  dscl . list /Users | grep -v '^_'

List all members of a group :\\
https://superuser.com/questions/279891/list-all-members-of-a-group-from-the-command-line-in-os-x
  dscacheutil -q group -a name $group_name

  members () { dscl . -list /Users | while read user; do printf "$user "; dsmemberutil checkmembership -U "$user" -G "$*"; done | grep "is a member" | cut -d " " -f 1; };

Information about each user :\\
https://stackoverflow.com/questions/1303561/list-of-all-users-and-groups  dscl . readall /users
  dscl . readall /groups
  dscacheutil -q user
  dscacheutil -q group


==Sharing
List AFP/SMB share info (Samba's ''testparm -s'' for Macs) :\\
https://apple.stackexchange.com/questions/405658/list-and-define-smb-shares-from-command-line
  sharing -l

Connect to a File Server with a Specific Username (macOS)\\
https://kb.mlml.sjsu.edu/books/network-services/page/connect-to-a-file-server-with-a-specific-username-%28macos%29  
  smb://username:*@server.name

You can get the current authentication authorities of a user by entering :\\
https://apple.stackexchange.com/questions/306151/where-does-file-sharing-store-smb-passwords
  dscl . -read /users/$user authentication_authority

== See also

How to add a user from the command line\\
https://apple.stackexchange.com/questions/286749/how-to-add-a-user-from-the-command-line-in-macos
  sudo dscl localhost -create /Local/Default/Users/USERNAME_HERE
  /usr/sbin/sysadminctl -h
  sudo sysadminctl -addUser xxx -password xxxxxxxx interactive

OSX User/Group Management – Part 1: Users\\
https://blog.travismclarke.com/post/osx-cli-user-management/

https://apple.stackexchange.com/a/7288/14586

How to enable File Sharing on macOS Ventura\\
https://www.stratospherix.com/support/how-to-enable-file-sharing-on-mac.php

And for the sharing basics :\\
https://support.apple.com/guide/mac-help/set-up-file-sharing-on-mac-mh17131/mac