How to restart computers in single user mode?

I 'd like to use ARD to send a command to reboot target computers in Single User mode (and then run line of command).

have you considered just using safeboot? safeboot dose many of the same things applejack dose, and it's built into the mac os x.
Safeboot using ARD:
You can start a safeboot by send unix command, as root, command:
nvram boot-args="-x -v"
send command reboot computer
After the reboot, you could then send unix command, as user root, command:
sudo nvram boot-args=""
send command reboot computer
NOTE: some features do not work while the computer is in safeboot, so it's a good idea to have the computer plugged in by ethernet, because most macs still work over ethernet in safeboot.
Or you could just tell the user to reboot the computer holding the shift key, and when they get to the login window with the words "safeboot" to reboot the computer again.
FYI: in the past i've ran safeboot, and watching the output, I could see it repaired the disk and permistions. soo if I had a disk that needed repairing, you could in thory try safeboot to fix the issue. The computer already runs a RAM test every time you power on the computer.

Similar Messages

How to put database in single user mode?

hi
how to put database in single user mode?and what could be the impact of this to EBS R12 RUP 6.DB 10.2.0.0
rgrds

hsawwan wrote:
Hi,
Are you referring to restricted mode? If yes, please see these links/docs.
Restricting Access to an Open Database
http://download.oracle.com/docs/cd/E11882_01/server.112/e10595/start002.htm#ADMIN11155
Note: 1059291.6 - How to Put a Database into Restricted Mode and Verify Restricted Mode
The impact is none of the users will be able to connect to the database/application (except for the sys user which can connect to the database). Usually, you would need to put the database in restricted mode when doing upgrade/migrate (i.e. you do not want to have active user sessions in the database during that time).
Thanks,
HusseinHi
i want to mean:
ALTER SYSTEM QUIESCE RESTRICTEDThe ALTER SYSTEM QUIESCE RESTRICTED statement may wait a long time for active sessions to become inactive. You can determine the sessions that are blocking the quiesce operation by querying the V$BLOCKING_QUIESCE view. This view returns only a single column: SID (Session ID). You can join it with V$SESSION to get more information about the session, as shown in the following example:
select bl.sid, user, osuser, type, program
from v$blocking_quiesce bl, v$session se
where bl.sid = se.sid;I suspect all apps user can.t login to db?
Edited by: new2appsdba on Aug 19, 2010 1:54 AM

How to eject DVD in single user mode

Hi All,
When starting my iMac, I get a white screen, the apple logo and the spinning wheel. After a while it goes away and I have just a white screen.
I've reset PRAM, to no avail (it did do something, the computer start up sound now occurs each restart).
I can't start-up on the Mac OS install DVD because I have a DVD in the computer already and I can't seem to eject it.
I can't get into Open Firmware mode to eject the disk there, I'm hoping someone can give me the command to eject the disc from Single-User mode.
Chris

Try the methods listed in this page:
http://reviews.cnet.com/8301-13727_7-10333570-263.html
The method for Terminal may also work in single-user mode.

How to move files using Single User Mode

I messed up this one task that i didn't read all the way through and messed up. I Moved SecurityAgent.app (not SystemAgent.app my bad) and instead i moved my desktop to the CoreServices folder and renamed it SecurityAgent.app
How do i put the Desktop Back and put SystemAgents back into the CoreServices. Actually just the CoreServices. I have more than one account on my comp. so i will just fix my Desktop using that account.
Message was edited by: Connor.K

Run the following commands:
mount -uw /
cd /System/Library/CoreServices/
mv SecurityAgent.app Desktop
mv Desktop/SecurityAgent.app SecurityAgent.app
exit
(50685)

How do I get networking in single user mode?

My MBP won't boot OS X anymore (it tell's me I have to restart my pc). This happend after I redid my boot camp installation. Anyways disk utility/fsck won't repair the drive but I can still read the files...
Now whenever I try safe boot or run sh /etc/rc the machine panics/restarts. However single user mode has an ftp client and I have enough storage on a networked ftp server. Question is how do I get ethernet going without running sh /etc/rc?

Enter the following command into the Single User mode prompt:
ifconfig en0 up
Try using the FTP client after running the command. It assumes the connection used is the built-in Ethernet connection; use en1 for an AirPort connection or fw0 for a FireWire cable. The 0 is the number zero.
(11785)

How to get to single user mode

I aquired an old power mac G4 with an old account with 10.3.9 and an old administrator account. It seems that procedures to remove the account start in Single user mode. The computer won't start when holding down system - s. The drive clicks a few times but the display goes to sleep from no video signal. So How can I get to single user mode when the usual way don't work?

The hard drive's directory may be dead, or it may have last been booted into Mac OS 9. IF you are lucky, they did install Mac OS X on it, and that can be determined either through an Option key boot, or through an X key boot on a wired (not wireless) USB Apple compatible keyboard. X key booting will only work if the X operating system is on the same partition, whereas Option key boot will reveal the Startup Manager, where you select the drive and hit the right pointing arrow for the drive partition that has Mac OS X. Note this will not work on an original PCI PowerMac G4. You may also need to replace the PRAM battery, a 1/2 AA 3.6V battery from Radio Shack before any boot sequence will work. Once it boots into Mac OS X, Single User Mode should work.

Single user mode, Lost Admin Account, and Disk Permissions

Okay, so I have quite a few issues here. I will start from the beginning.
About a week ago, I tried to install some updates and I could not get the Admin account to work. I went to the users profile and noticed my Admin account was not there. Did a quick search and found Apple's outline of how to fix this via the Operational DVD and the root user. Tried this and it would never work, because as soon as I restarted the computer or changed screens it switched back to a standard account.
Next up, I went into the terminal to check the Admin User group. As it turns out it is not there. So I find a discussion on there that outlines how to rebuild this in single user mode and the Unix prompt. So, I print it off and try to restart in single user mode. After trying two different keyboards and a sum total of 8 to 10 times, I can't restart in single user mode to get to the Unix prompt.
One last thing, last night I went into the Disk Utility on the start-up DVD. I wanted to check the Repair Permission log and I got the following:
ACL found but not expected on "private/var/root/Library/Preferences"
ACL found but not expected on "private/var/root/Library/"
ACL found but not expected on "Network"
Thoughts?
Thanks for your help!
tpp

first, the ACL messages can be ignored. if you can't get to single user mode you can't fix your admin group. the only reasons that I know why you wouldn't be able to do that is
1. a defective keyboard
2. you have a firmware password set. have you? you'd have to turn it off before you can get to single user mode.
lastly when you restart in single user mode make sure you press command+s right after you hear the chime. do not press it too early or too late. lastly, I'm not sure which instructions you've found to fix the admin group but I have them in this thread
http://discussions.apple.com/thread.jspa?messageID=8011324

Unable to start in single-user mode - HD dead?

My MacBook Pro (Mac OS X) refused to start, it hung up on the loading screen where you see the apple and the spinning loading wheel. I found out how to fix this, I had to go into single-user mode and type "/sbin/fsck -fy" to repair/verify the disk (I was unable to do so from the Disk Utility via the Install Disc, the repair/verify buttons were just grayed out).
Anyways, doing this from the command line (single-user mode) fixed the problem and I could boot into Mac OS X (there were more issuses after this point which forced me to do an "Archive and Install").
^ that happened a week ago. And happened again yesterday, hung up on the exact same point. So I boot up my Mac into single-user mode, and type in "/sbin/fsck -fy" to start the process. Different from last time, I got a lot of text this time. It also kept going for a longer while. After about 10 minutes, there was a couple of minutes where nothing happened. So I typed "/sbin/fsck -fy" again (as I'm supposed to do so until it says "** The volume (nameofvolume) appears to be OK"), and I got some more text, then nothing happened for a while.
Inpatient as I am, I considered the process to be complete, and restarted my Mac by typing "exit".
I think I ****** up my Mac OS X partition at this point. Because when I try to start my Mac now, it automaticly boots into Windows XP (my other partition). Also I cannot enter single-user mode or Verbose mode, the Mac just ignores and goes right into Windows XP.
I've tried to boot from the Install Disc. When I run Disk Utility, the "HD"(name of Mac OS X partition) is grayed out. I can't do an Archive and Install because it cannot detect my main partition.
An interesting thing though: When I have the Install Disc inserted, I can enter single-user mode (by holding cmd+s at startup). However, when I type /sbin/fsck -fy, it starts verifying the Install Disc rather than the HD.
Also when I open My Computer in Windows XP, I can see the other partition (MacDrive). When I select it, I see:
Free Space: 219GB
Total Size: 168GB
This indicates that my HD is dead/erased, and that my last three months of work is gone. This just because I'm impatient, and didn't wait for the fsck process to complete.
What is the next step? How can I get into single-user mode so that I can verify/repair my disc?

On the point of contacting the folks at Alsoft, I have found that they seem to be unobtainable on www.alsoft.com at present.
I wanted to get in touch as I had a small problem with Diskwarrior on updating to 10.5.5 from 10.5.4 ,
Disk permissions ends with an error code.
I wonder if there were so many queries re this that they are unobtainable?
I run 3 machines from a wireless router, an iMac, an HP laptop with XP and a totally obsolete Dell into which i have squeezed W2000, with a resultant mix of browsers but no contact with the folks at Alsoft.
Am I in a minority of one here?

Network / external access when booted in single-user mode from install CD?

So I have this iBook with a semi-functional hard drive: can't boot from it (either normal or single-user), can't use it in Firewire Target Disk mode, can't fix it with Disk Utility, an overnight run with Disk Warrior seemed to be hung, etc, BUT if I boot in single-user mode from the install CD I can then mount it readonly and see at least many of the files on it.
So now I want to slurp the important ones of those files off of it over the network (or in any other clever way anyone can suggest). I'm not a huge Unix or Darwin expert, so an exact set of commands would be appreciated. *8) A friend suggested to me that I might be able to 'init' it at a 'runlevel' that included the networking stack, but I dunno what that means. *8) Does the CD in fact include a full networking stack? Or anything else that I might be able to use to slurp some data from the hard disk before it gives up entirely?
Tx very...
Message was edited by: David Chess; annoying typo

David
I think Ronda was hoping you had the Tiger Instal DVD, which has a copy of Terminal on it.
You said earlier that trying to boot into Target Disk Mode didn't work. Would it help you if you could? If so, I can show you how to do it from Single User Mode. I've done it, and it works, although admittedly I did boot into SU mode from my HD, not my Instal Disc (I have tried that, it also works, I just haven't done both together).
If you can make use of this, post back and tell me what you get from which nvram when you are booted in SU mode from your CD. It's possible that command won't be available on the CD—so we need to check first. If it says "which: no such command", try ls -l /usr/sbin/nvram instead.

Stuck while booting in single user mode. How to go back?

Guys. I'd appreciate your advice very much - this concerns my main system.
MacBook 3,1 with OSX 10.5.? (latest)
Did: activate single user boot in Onyx; reboot
Problem: stuck at boot (apple logo & spinning wheel on gray background for 2hours+). Persistent across reboots.
No different results for this key combinations: cmd-opt-p-r, power button for 5 sec whilst without battery/cable, cmd-s, C (possibly not recognized due to firmware password) Power button held down from switch-on moment makes the light flash a few times, produces a beep but no improvement.
Interestingly pressing alt lets me choose the os (HD or Leopard install disc) but gets stuck the same way regardless. It boots into Ubuntu tho.
I have a TIme Machine disk that I can restore from, and can read from the internal Leopard HD while in Ubuntu.
So, please: how do I get it to boot? I'd set the nvram bootargs="" but from where...

Sorry, don't know how you'd recover from the apparent limbo you're in, but this would agree with the explanation you already hit upon.
http://support.apple.com/kb/HT1352
Features of Open Firmware Password Protection
Intel-based Mac computers Power PC Intel
Blocks the ability to use the "C" key to start up from an optical disc.
Blocks the ability to use the "D" key to start up from the Diagnostic volume of the Install DVD.
Blocks the ability to use the "N" key to start up from a NetBoot server.
Blocks the ability to use the "T" key to start up in Target Disk Mode (on computers that offer this feature).
Blocks the ability to start up in Verbose mode by pressing the Command-V key combination during startup.
Block the ability to start up a system in Single-user mode by pressing the Command-S key combination during startup.
Blocks a reset of Parameter RAM (PRAM) by pressing the Command-Option-P-R key combination during startup.
Requires the password to enter commands after starting up in Open Firmware, which is done by pressing the Command-Option-O-F key combination during startup.
Blocks the ability to start up in Safe Boot mode by pressing the Shift key during startup.
Requires the password to use the Startup Manager, accessed by pressing the Option key during startup (see below).

Restarts in single user mode since install

Hi,
I've only seen this problem on one of my computers. Since installing SL (from family disk), when restarting or starting from full shut down, the MBAir starts in Single User mode with command lines. I actually think it showed the GUI for about 2 seconds then goes into the command line text. Shows a bunch of the usual stuff about MAC framework initiations and lines about kernel dependency. I don't see any error lines repeated (but I do not understand much of the code) and it does not offer me a prompt. After about 1 minute, it launches the OS X gui and everything else is fine.
I updated the 10.6.1 - same problem persists.
So far I've verified, repaired some permission, PRAM, and tech tools basic. Do I need to do some deeper investigating? Any ideas?
Thanks
bc

bluecool wrote:
Will do. Do you mean re-choose the start up disk from the sys pref? Why might it search for another start up disk?
resetting PRAM clears the startup disk settings.

How do I reset Tiger Mac OS X 10.4 admin password by using single-user mode

bought a used PowerBook G4 on Ebay. The administrator's password was locked. The Powerbook still can run to the normal screen. However, I am unable to update and install software without a password.
I don't have the original install CD either the second mac for firmware reset. So I wonder if anyone knows how to reset the password by using single user mode or any other methods to do so?
Any input will be greatly appreciate it. Thanks.
Powerbook G4 Mac OS X (10.4)

This morning we lost power and my iMac G5 (10.4) system got messed up. Specifically, when it restarted, all text in all Finder and application menus were blank (e.g. Click the Apple menu and a long empty white box stretching to the bottom of the screen would appear with no text. The whole box turns blue when you click in it. Ditto for all other finder menus and dialog boxes. Event the User menu was empty. The Disk Utility application shows only icons and empty buttons--no text.)
Restarting in Safe Mode was no better.
I then connected the G5 as a target disk to my iMac G4, and ran the OS X install that came with the G5 (10.3.2). It told me that in order to install an earlier OS X version, I must select certain options: I checked "Archive and Install" and "Preserve Users and Network Settings" (I have 4 accounts set up in addition to my onw admin account) and proceeded with the installation.
At the end of installation, the G4 started (G5 is still in target disk mode) with the G5 as the startup disk. It presented the User Login screen (although it normally does auto-login on my account) but the password for each of the 5 accounts was rejected. The original hints still appear, but it seems that all passwords have been changed.
I then tried the G5 on its own (not as a Target disk) but when it starts up the grey Apple turns into a grey "do not enter" (circle/slash) icon and goes no further.
Can you suggest what I should do now?
iMac G5 2.0GHz Mac OS X (10.4.7)

How do i repair my hard drive in single user mode when disk is full?

Hi there Apple Community!
I have an old Macbook Pro 17" with an upgraded 500GB harddrive and 4GB memory. I'm running Mac OSX Lion.
Was hoping you could help me out. THis is the situation:
Long story short I spilt wine on my macbook and the screen went a bit blobby. Switched it off for a few days, removed the battery etc. etc. Opened it up cleaned out as much of the wine as possible, but unfortunately some of it came in behind the LCD, so now the screen has a nice red stain. Obviously I'm not going to try to clean that out of the LCD.
My Macbook Pro still worked for a few days after that, but then my harddrive gave up. I booted in the Recovery HD menu, verified the drive and I got the error "Keys out of order - This disk needs to be repaired, click Repair Disk." I attempted to repair the disk but got the error "Keys out of order - Disk Full Error - The volume could not be repaired".
Unfortnately of this 500GB I only have about 7GB free on it, as I have a huge iPhoto and iTunes library. I did make a TIme Machine backup of my user directory, but not the system files. I don't really want to do a clean install because:
1) I'm paranoid that there's something I did not fully back up
2) I don't want to have to download the whole Mac OSX Lion again. I should have made a USB bootable backup when I had the chance. I don't have access to a broadband connection.
What I feel are my viable options, are as follows:
1) I did buy a replacement internal 500GB harddrive, so I can probably try to make an image of the hard drive to this new drive, but not sure how. I believe it's through the Disk Utility with the "New Image" option but not sure how to go from there.
2) Start up in Single User Mode and delete some unnecessary files and re-attempt to run the fschk -fy utility again (I tried this earlier and got the same Disk Full Error). - the problem with this is, I'm not familiar with the command line and have no clue how to delete files. I don't know my way around Unix.
3) I can also probably attempt to make a Ghost Image or Acronis Image of the failed drive to this new drive, but not sure if Norton Ghost or Acronis True Image will be able to read this HFS drive - I believe it's possible as it's a simple hard drive clone.
If you can guide me in the best option - probably there is a better solution than my proposed ones above, I appreciate any feedback and comments you might have!

hi Baltwo,
So I ended up copying my user folder to another harddrive. I managed to download the whole osx lion again, reinstalled, and recovered my home folder using this discussion:
http://support.apple.com/kb/HT1428
I have managed to get all my files back. My iTunes library works fine, but my iPhoto library when I open it, get the following error:
iPhoto cannot be opened because of a problem.
Here's the error log
Process:         iPhoto [1540]
Path:            /Applications/iPhoto.app/Contents/MacOS/iPhoto
Identifier:      com.apple.iPhoto
Version:         8.1.2 (8.1.2)
Build Info:      iPhotoProject-4240000~8
Code Type:       X86 (Native)
Parent Process: launchd [209]
Date/Time:       2012-09-19 19:56:45.528 +0200
OS Version:      Mac OS X 10.7.4 (11E53)
Report Version: 9
Sleep/Wake UUID: 7948ABE2-5294-4F87-B6E3-777095A2F2EE
Interval Since Last Report:          4780 sec
Crashes Since Last Report:           9
Per-App Crashes Since Last Report:   9
Anonymous UUID:                      70117D38-03EA-4F9C-B810-50B743864B9E
Crashed Thread: 0
Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000002, 0x0000000000000000
Application Specific Information:
dyld: launch, loading dependent libraries
Dyld Error Message:
Library not loaded: /System/Library/PrivateFrameworks/iLifeSlideshow.framework/Versions/A/iLifeSlid eshow
Referenced from: /Applications/iPhoto.app/Contents/MacOS/iPhoto
Reason: image not found
I've done an Apple Software Update but it didn't find an update for iPhoto.
One thing to note is, this library was originally created on iLife 08, upgraded to '09 and it stayed on that version. It hasn't een upgraded to iLife '11. It worked fine on my previous install of OSX Lion. How do I recover the library without upgrading to '11 ?

How to mount USB & CDROM drives from single user mode - Solaris boot disk?

Hi All,
I need to carry out ufsrestore on a single newly replaced system disk (no redundancy / mirroring) from either USB or CDROM drives from the following steps:
( i ) GRUB => e, e, cdrom –s, Enter, b (boot from Solaris 10 x86 media).
( ii ) Choose menu 1 for Install Solaris Interactive Mode to reach single user mode.Below are the commands that I have tried in single user mode without success:
mount –r –F pcfs /dev/dsk/c1t0d0p0 /cdrom (after unmount Solaris CD)
mount: /dev/dsk/c1t0d0p0 is not a DOS filesystem.
svcadm –v enable smserver
svcadm: Pattern ‘smserver’ doesn’t match any instances
svcadm enable autofs
svcadm: Pattern ‘autofs’ doesn’t match any instances
devfsadm
devfsadm: mkdir failed for /dev 0s1ed: Read-only file system
mkdir /mnt
mkdir: Failed to make directory “/mnt”; Read-only file systemPart of the problem is due to the current READ ONLY filesystems which does not allow the creation of mount point such as /mnt.
I have been able to create both / root (/dev/dsk/c1t0d0s0) and /export/home (/dev/dsk/c1t0d0s0) filesystems with newfs that are awaiting for restore using ufsrestore.
The only option I am left with is to attach a secondary disk to install Solaris 10 on either of them before bring the system to multi-user mode so that service such as volmgt, autofs, volfs are available to access USB & CDROM drives.
Any suggestion on how to resolve this issue?
Many thanks,
Jack

Hi JKGN,
Is the directory a located under the root filesystem. ie /a? Are there any other mount point for say USB drive as well? I am not in a position to try it out right now but will get back
to you soon on whether /a exist or not.
Btw, the last thing I managed to do on this system at the time was added a secondary 1TB internal disk with the intention to restore both / and /export/home data onto this disk while
making use of all the disk device management services such as the following services only available in a fully installed Solaris system (both single & multi-user modes) installed on the
primary disk:
# svcs smserver
STATE          STIME    FMRI
online         Jun_08   svc:/network/rpc/smserver:default
# svcs autofs
STATE          STIME    FMRI
online         Jun_08   svc:/system/filesystem/autofs:default
# devfsadm
# iostat -En
c1t0d0           Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: ATA      Product: SAMSUNG HD321KJ Revision: 0-11 Serial No:
Size: 320.07GB <320072932864 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 41 Predictive Failure Analysis: 0
c0t0d0           Soft Errors: 0 Hard Errors: 5 Transport Errors: 0
Vendor: PHILIPS Product: DVD+-RW DVD8801 Revision: AD21 Serial
Size: 17.54GB <17538875392 bytes>
Media Error: 0 Device Not Ready: 5 No Device: 0 Recoverable: 0
Illegal Request: 10 Predictive Failure Analysis: 0
c2t0d0           Soft Errors: 0 Hard Errors: 0 Transport Errors: 0
Vendor: JetFlash Product: Transcend 16GB   Revision: 1100 Serial No:
Size: 0.00GB <0 bytes>
Media Error: 0 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 7 Predictive Failure Analysis: 0
# rmformat
Looking for devices...
     1. Volmgt Node: /vol/dev/aliases/cdrom0
        Logical Node: /dev/rdsk/c0t0d0s2
        Physical Node: /pci@0,0/pci-ide@1f,1/ide@0/sd@0,0
        Connected Device: PHILIPS DVD+-RW DVD8801 AD21
        Device Type: DVD Reader/WriterHowever, I was disappointed that "iostat -En" has not found the secondary disk (1 TB) even though it was available earlier, for Solaris installation as the only disk on the same system.
As a result, I am left with no option but the need to rebuild this system with only a single primary disk while in single user mode. However, the single user mode that I am in is the
one from Solaris installation disk with restrictive (_cannot create folder for mount point or running disk management utilities_) capability such as those services just covered, compared to one from a completed Solaris installation system with full access to all filesystems and utilities / commands in general.
I would very much value your assistance on how to mount both CD & USB in this restrictive limited Read Only OS (assume that it is running from memory) in order to get complete access to
the blank primary disk so that full restore with ufsrestore could take place.
Thanks in advance,
Jack
Edited by: 797805 on 9/06/2012 04:15

How do change boot disk from single user mode?

My G5 hangs when booting at the blue screen while "Loading printing services...". Attempting to boot into safe mode only hangs at the grey gear screen. It will, however, successfully boot into single user mode. I've run fsck but no change in bootability. I have another disk in the machine that has Tiger on it. How do I change the boot disk from the single user prompt?

You can hold c and boot off the installer disk and select disk utility repair disk/permissions
or you can hold option to boot off Mac OS X on another drive, like a clone and run Data Rescue to recvoer your files.
It does sound bad, you can try going through these
http://docs.info.apple.com/article.html?artnum=106464
But I think you'll need a fresh install, hopefully you have been backing up/cloning to a external drive.
http://homepage.mac.com/hogfish/Personal11.html

How to restart computers in single user mode?

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