I know iOS is a super fast and optimized operating system but still there are some services that start but are unuseful for us and consume memory that can be used in other ways.
So in order to disable this services you must have a jailbroken iDevice with OpenSSH installed (you can install from Cydia).
How connect to your device (after you connected to an wireless network) using Putty or any other ssh client (Mac users can connect from terminal). The default password for OpenSSH after fresh install is: alpine
Now copy line, one by one in order to disable the services.
launchctl unload /System/Library/LaunchDaemons/com.apple.CrashHousekeeping.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.DumpPanic.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.ReportCrash.DirectoryService.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.ReportCrash.Jetsam.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.ReportCrash.SafetyNet.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.ReportCrash.SimulateCrash.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.ReportCrash.StackShot.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.ReportCrash.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.apsd.tcpdump.en0.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.apsd.tcpdump.pdp_ip0.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.chud.chum.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.chud.pilotfish.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.marco.tcpdump.en0.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.tcpdump.server.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.datamigrator.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.marcoagent.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.syslogd.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.powerlog.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.mobile.profile_janitor.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.AOSNotification.plist
launchctl unload /System/Library/LaunchDaemons/com.apple.AdminLite.plist
Reboot your iDevice. Now the startup speed should be improved. Also memory usage on fresh reboot is lower.
Tried these optimizations on iPhone 3GS and iPad 3G.
For those people who get error on launching greenp0ison on OSX 10.5.8.
Dyld Error Message:
Library not loaded: /usr/lib/libcurl.4.dylib
Referenced from: /Users/username/Downloads/greenpois0n-5.app/Contents/MacOS/greenpois0n
Reason: Incompatible library version: greenpois0n requires version 6.0.0 or later, but libcurl.4.dylib provides version 4.0.0
Here is a fast fix:
Download libcurl.4.dylib
unzip the archive
- open terminal
- sudo su
- copy the file to /usr/lib overwriting the current one then.
- then use: cd /usr/lib
- Use command: chown root:wheel libcurl.4.dylib
- Use command: chmod 755 libcurl.4.dylib
start greenp0ison
Today I installed for test on my iPad, iOS 4.3b2. Unfortunelly I don’t have an developer account and my UDID is not registered anyware so…I was stuck on the Recovery screen. Researching on internet, I found that you can bypass this very easly.
This is how you need to do in order to bypass UDID activation and jailbreak iOS 4.3b2:
1. If you already had a jailbroken phone/ipad/ipod and you modified the hosts file from (windows: c:\windows\system32\drivers\etc) – (mac: /private/etc/hosts) comment out the line: 74.208.105.171 gs.apple.com
I suggest to download TinyUmbrella http://thefirmwareumbrella.blogspot.com/ and save your SHSH blobs for 4.2.1 and 4.3b2 so you can restore in future.
2. Now put your iPad in DFU mode pressing Main button + Power Button same time and wait 10 seconds, after that release the Power Button but keep Main Button pressed another 10 seconds.
3. Restore iDevice to iOS 4.3b2 (Press to download; search for: iPad1,1_4.3_8F5153d_Restore.ipsw)
4. After restore put device again in DFU mode using redsn0w 0.9.7b6 Mac only (press to download) or redsn0w 0.9.6b8 Windows only (press to download). Now click browse for the iOS 4.2.1 firmware (press to download). Look at the images bellow:
Connect your device TURNED OFF. Press Next and follow instructions how to put in DFU mode.
redsn0w will jailbreak your iPad and will install Cydia.
5. After reboot you will notice that you are still in recovery mode. In order to bypass this, connect iPad to your computer, now using iSpirt for windows (press to download) or iPhone Explorer for Mac (press to download) browse to /System/Library/CoreServices/SystemVersion.plist like in the picture attached bellow:
Remove:
<key>ReleaseType</key>
<string>Beta</string>
6. After pressing Save button just reboot the iPad, let him boot normally to Recovery Screen connected to computer, then open iTunes and it will automatically activate your iPad.
7. In order to use the iPad in jailbreak state you will need to shutdown again. Then put it normally like in Step 2 in DFU mode. Download tetheredboot-syshalt-4.3b2.zip (press to download), unzip then open tetheredboot.bat (not the .exe one) and he will start to upload the new patched kernel and boot tethered state (it will appear a white screen, don’t worry, just wait he will, boot into SpringBoard in around 40 seconds).
Here are some screenshots that prove is working.
IMPORTANT!!
Every time you will reboot the iPad, need to connect him at computer in DFU mode, and boot tethered using tetheredboot.bat
