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macOS Sysadmin Cheatsheet

find JAMF Policies ran in the last hour

cat /var/log/jamf.log | grep "$(date "+%a %b %e %H")"

last day

cat /var/log/jamf.log | grep "$(date "+%a %b %e")"

run a speedcheck multiply x10 for MB/sec roughly

curl -o /dev/null http://speedtest.wdc01.softlayer.com/downloads/test10.zip

plist to json (used for autopkg)

plutil -convert json site-autopkg_prefs.plist -o site.plist

how to get app version

defaults read /Applications/zoom.us.app/Contents/Info.plist CFBundleShortVersionString
defaults read /Applications/Slack.app/Contents/Info.plist CFBundleShortVersionString

how to get bundle ID

/usr/libexec/PlistBuddy -c 'Print CFBundleIdentifier' /Applications/Safari.app/Contents/Info.plist

Bundle ID's Collection (if you're too busy to look up)

com.adobe.acc.AdobeCreativeCloud
com.adobe.Reader
com.adobe.acc.AdobeCreativeCloud
com.linebreak.CloudAppMacOSX
com.getdropbox.dropbox
com.FormaGrid.Airtable
com.google.Chrome
org.mozilla.firefox
com.microsoft.Word
com.microsoft.Excel
com.microsoft.Outlook
com.microsoft.Powerpoint
com.microsoft.OneDrive-mac
com.tinyspeck.slackmacgap
WhatsApp
io.zeplin.osx
us.zoom.xos

a good jamf patching source

Patch Source: 3 (BeatleMike)

beta2.communitypatch.com/jamf/v1/64b23b234facb1d173e92941cf3ff452

who/why defered in jamf (see whodefered.sh)

cat /Library/Application\ Support/JAMF/.userdelay.plist

clear depnotify fails (cfprefsd is evil)

curl -O https://raw.githubusercontent.com/jamf/DEPNotify-Starter/master/depNotifyReset.sh && sudo sh depNotifyReset.sh

see what crashed and why

ls /Users/$USER/Library/Logs/DiagnosticReports/

kext lookup cheatsheet

sudo sqlite3 /var/db/SystemPolicyConfiguration/KextPolicy
select * from kext_policy;

reset a users password Jamf Pro

sudo jamf resetPassword -username <name> -password <password>

enable SSH access for only ONE USER macos

systemsetup -setremotelogin on
launchctl unload /System/Library/LaunchDaemons/ssh.plist
# Delete SSH access for existing users and groups
dscl . delete /Groups/com.apple.access_ssh NestedGroups
dscl . delete /Groups/com.apple.access_ssh GroupMembership
# Add SSH access for specific user(s)
dscl . create /Groups/com.apple.access_ssh GroupMembership test
# turnon
launchctl load /System/Library/LaunchDaemons/ssh.plist


Side Load Catalina installer

cd /tmp && curl -O https://raw.githubusercontent.com/grahampugh/erase-install/master/erase-install.sh && sudo bash erase-install.sh --move --version=10.15.2

no screensaver allowed in login screen

sudo defaults write /Library/Preferences/com.apple.screensaver loginWindowIdleTime 0

Add Printsystem to JAMF

PPD's are in /private/etc/cups/PPD

drivers are in /Library/Printers/PPDs/Contents/Resources/

Mac Admin GUI Tools

Privledges.app

/Applications/Privileges.app/Contents/Resources/PrivilegesCLI --remove

MacAdmin Commands and Tricks

oneDrive mac files on demand scope

Files On-Demand requires the latest version of Mac OS Mojave 10.14. You can download and install Mac OS Mojave from the Mac App Store.

generate a serial number

python -c "import string; from random import randint, sample; print('VM' + ''.join(sample((string.ascii_uppercase + string.digits),10)))"

sign packages (you have to setup your Apple Developer ID 1st)

productsign --sign “Developer ID Installer: Your Developer Name (12345asdf1234)” ~/Desktop/example.pkg ~/Desktop/signed-example.pkg

check the package signature

pkgutil --check-signature /path/to/package.pkg

make guest account script

curl -O https://raw.githubusercontent.com/sheagcraig/guestAccount/master/guest_account && sudo guest_account enable

make macOs USB installers Instructions

https://support.apple.com/hr-hr/HT201372

install pkg's

sudo installer -pkg /path/to/package.pkg -target /

create a bootable VMWare Mojave Image

Create a virtual disk image .dmg to fit the installation media. This command will do the trick: hdiutil create -o /tmp/Mojave -size 8000m -layout SPUD -fs HFS+J

Mount it using this command: hdiutil attach /tmp/Mojave.dmg -noverify -mountpoint /Volumes/install_build

Use the createinstallmedia tool that is packed in the Mojave installer that you downloaded from the AppStore to write the Mojave Installer to the virtual disk image we just created. remember to use sudo!: sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/Mojave

users

copy paste and press return to rename computers with zackn9nez hoStnamE ChanGeR ScRiPT 💻

curl -O https://raw.githubusercontent.com/zackn9ne/macos_setup_cheatsheet/master/host-name-changer.sh && sh host-name-changer.sh

escallate user to admin

dscl . -append /groups/admin GroupMembership USERNAME

revok admin privledges

sudo dseditgroup -o edit -d USERNAME -t user admin

password reset

/usr/bin/dscl . -passwd /Users/USERNAME "N3wPassWorD"

is root user enabeled

sudo dscl . -read /Users/root Password

is securetoken on for user

sysadminctl interactive -secureTokenStatus USER_NAME

get logged in user

loggedInUser=`python -c 'from SystemConfiguration import SCDynamicStoreCopyConsoleUser; import sys; username = (SCDynamicStoreCopyConsoleUser(None, None, None) or [None])[0]; username = [username,""][username in [u"loginwindow", None, u""]]; sys.stdout.write(username + "\n");'`

or

get logged in console user

id -un

get all users

dscl . list /Users | grep -v '_'

get admin users

dscacheutil -q group -a name admin

delete user

sudo sysadminctl -deleteUser USERNAME

log people out 🚪

sudo pkill loginwindow #logs you out eg, xdg-logout gnome-session-quit

is mac bound to ad

dsconfigad -show | awk '/Active Directory Domain/{print $NF}'

reset mac to new status on boot password break in hack 💽

Start or restart your Mac. As soon as you hear the startup tone, press and hold Command-S on the keyboard. Keep holding down those keys until you see a black screen with white lettering. This is called “booting into Single User Mode.”

rm /var/db/.applesetupdone #will ask to create user account on next boot with GUI #you have to be onsite and boot into single user mode

macos cruft

rebuild spotlight index 🔦

sudo mdutil -i on /

open link in chrome

open -a "Google Chrome" https://chrome.google.com/webstore/detail/clear-cache/cppjkneekbjaeellbfkmgnhonkkjfpdn?hl=en

Chrome Remove Searchvirus

#!/bin/sh
sudo pkill chrome
rm -rf "~/Library/Application Support/Google"
rm -rf "~/Library/Caches/com.google.Chrome*"
rm -rf "~/Library/Google"

Essential MacAdmin Tools

autopkg and autopkgr (GUI)

1. download and install autopkg
2. autopkg repo-add https://github.com/autopkg/recipes
3. autopkg list-recipes | grep Excel
4. autopkg run MicrosoftExcel2016.install
5. open ~/Library/AutoPkg/Cache/

PPPCUtility

how to create a kext

Create a kext from an pre-approved action on a sample machine.
Using the output from the Kext_Policy table, locate the Team_ID for the application and add it to the 'AllowedTeamIdentifiers'. In the provided ApprovedKEXT.mobileconfig file in this repo.
Push Config Profile to machine using MDM.

LINKS

https://support.jamfschool.com/hc/en-us/articles/115004701513-Whitelist-Kernel-Extensions
https://chris-collins.io/2018/03/15/Using-Terminal-At-macOS-Setup-Assistant/
https://forums.ivanti.com/s/article/How-To-Add-Kernel-Extension-Exceptions-using-Ivanti-MDM-in-2018-3
https://twocanoes.com/12-customizations-for-the-mojave-macos-login-window-that-you-didnt-know-about/
https://alvinalexander.com/mac-os-x/mac-osx-startup-crontab-launchd-jobs

filevault commands

## is fv on?
`sudo fdesetup status`

## check fv status
diskutil cs list | grep 'Conversion Progress'

### check fv status live update eg or... wait check status with command emulation
while :; do clear; diskutil cs list | grep 'Conversion Progress'; sleep 2; done

## can user unlock filevault
sysadminctl -secureTokenStatus tracy

## troubleshooting a failed filevault
fdesetup status
sudo fdesetup disable

##add user to filevault unlock list
sudo fdesetup add -usertoadd username

## filevault spare tires
sudo fdesetup list
sudo diskutil apfs updatePreboot /

send notification to user

osascript -e 'display alert "Hello World!" message "The reason for this pop-up alert: IT Work In Progress"'
osascript -e 'display alert "Hello World!" message "Leave open and plugged in: Automated installs in progress"'

mobileconfig to supress chrome 1strun

curl -o firstchrome.mobileconfig  https://raw.githubusercontent.com/moofit/Config_Profiles/master/Google%20Chrome%20-%20Suppress%20First%20Run.mobileconfig && open firstchrome.mobileconfig

install printer using lpinfo.. make a package to install drivers first

#install drivers first
CURRENTPRNTR=`sudo cat /etc/cups/printers.conf | grep MakeModel | cut -c11-`
lpinfo --make-and-model "$CURRENTPRNTR" -m

lpoptions -l #list all printer options
lpadmin -p $MODEL \
-o StringBeforeEqualsSign=ValueAfterColon #found on lpoptions -l pRiNtErNaMe -t

Installinstallmacos.py Cheatsheet MacOS Installers, run them via command line

sudo curl -o installmacos.py https://raw.githubusercontent.com/munki/macadmin-scripts/master/installinstallmacos.py
sudo python installmacos.py
## or if coming from an older version the catalogurl might have to be spec'd
sudo python installmacos.py --catalogurl https://swscan.apple.com/content/catalogs/others/index-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog

## do user interaction, wait for download, then...
hdiutil attach ./Install_macOS_10.14.3-18D109.dmg 
open ./Install_macOS_10.14.3-18D109.dmg 

Mojave installer

create a mojave installer USB

sudo ~/Downloads/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/newdisk

erase and reinstall

sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/startosinstall --agreetolicense --eraseinstall --newvolumename "Macintosh HD" --nointeraction

do in place upgrade

sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/startosinstall --agreetolicense --nointeraction

Reset Dock

#!/bin/sh
killall cfprefsd
killall Dock

#if these don't work try v
rm $HOME/Library/Preferences/com.apple.Dock.plist; killall cfprefsd; killall Dock

Copy and Paste all this and press return. Dock Icons uses https://github.com/homebysix/docklib library

#!/bin/sh
echo "downloading library..."
curl -O https://raw.githubusercontent.com/homebysix/docklib/4f3e173367f24b034c60092472c9523d8c7ddfca/docklib.py
echo "downloading script..."
curl -O https://raw.githubusercontent.com/zackn9ne/macos_setup_cheatsheet/master/dock.py
echo "creating dock..."
python dock.py

microsoft (python script) (installer) (run as user with admin priveledges, eg sudo)

#!/usr/bin/env python
import urllib2
import os
import sys

filedata = urllib2.urlopen('https://go.microsoft.com/fwlink/?linkid=830196')
datatowrite = filedata.read()

with open('./msupdater.pkg', 'wb') as f:
    f.write(datatowrite)

os.system('sudo installer -pkg ./msupdater.pkg -target /')
os.system('cd /Library/Application\ Support/Microsoft/MAU2.0/Microsoft\ AutoUpdate.app/Contents/MacOS && ./msupdate --install')

..but if you have to script.. slack (python)

#!/usr/bin/env python
import urllib2
import os
import sys

src = "https://raw.githubusercontent.com/bwiessner/install_latest_slack_osx_app/master/install_latest_slack_osx_app.sh"
dest = "slack.sh"

filedata = urllib2.urlopen(src)
datatowrite = filedata.read()

with open('./' + dest, 'wb') as f:
    f.write(datatowrite)
    
os.system('sudo chmod +x' + dest)
os.system('sudo ./' + dest)

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