Sudo chown + chmod on system drive?

Hello,
Before I mess my system drive up I wanted to check if this is ok.
For various reasons I have created a new Account that I wish to migrate to. I log in ok and can change permissions but there seem to be files on various places that I keep having to set permissions for and wish to resolve this for the whole drive.
What I want is a way to set permissions on all non system files to add admin access as it appears it is not there for certain files
I found the below commands which worked on my media drive but am reluctant to run it on the system drive:
sudo chflags 0 /Volumes/System
sudo chown 0:80 /Volumes/System
sudo chmod 775 /Volumes/System
sudo chmod -N /Volumes/System
I think the one above should have the "R" in as below to do this recursivly ?
sudo chmod -RN /Volumes/System
I don't want to mess up the system drive so I thought I should check if this is ok or not. I think some system files need to be read only so I need to know if this will render the drive useless(I do have a full backup).
I also see people recomend Batchmod but am again unsure if this will work or what settings to use?

Thanks Niel,
I have read numorous posts from yourself and V.K. relating to locked secondary drives but nothing relating to system drives and fully expected that answer. can I bother you a bit more please?
Can I safly run those commands on some of these folders?
system\users\olduseraccount
System\library\application support
System\library\audio
I think that would solve most issues there are hundreds of folders with presets from plugins that have installed with only my old account as read write not admins?
Thanks again Niel
Ross

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hi
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Type umount /dev/disk0s2, replacing disk0s2 with whatever disk your OS lives on.
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will any of those save me from a archive and install?
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thanks

biovizier wrote:
Oh come on, it isn't exactly rocket science. Compare actual permissions to expected permissions and correct discrepancies, while making allowances for a few special cases. The 'chmod -R' command does {sic} move or alter any files, it just changes the permissions so I think it falls well within the realm of what "repair permissions" should be able to handle (but I'd bet it would be faster just to reinstall).
Rocket science is not required to understand that with the "-R" option applied to the root level of the startup drive this isn't something that the permissions repair utility (in any version, old or new) is capable of repairing. That option is the command line equivalent of the Finder's "Apply to enclosed items" option, so the command affects every file in the entire filesystem hierarchy!
At best, the utility can reset permissions only of files with entries in the receipts database -- it is the only place expected permissions are stored -- & if a user acting with superuser privileges clobbers access to that, the OS is going to make those changes, even if it means making the receipts folder unavailable to the routines that must access it. The idea that the OS should 'make allowances' for that special case is ridiculous -- it is tantamount to the idea that there should be a 'super-duper-user' built into the system that prevents users willfully acting with superuser privileges from doing anything foolish.
Apple doesn't need an excuse to leave things as they are. They are that way because the permissions repair utility is not, never has been, & never will be the panacea for every permissions issue that a few users seem to think it should be. As far as I can tell, the only basis for that idea is a superficial examination of the name of the utility, some wishful thinking, & more than a little disregard for what is impractical, if not downright impossible, to implement in a general purpose, UNIX-based OS.
Anytime any user invokes sudo, they should remember the time-tested warning that *with great power comes great responsibility*. In one form or another, that warning has been around for at least 2000 years. It is no less true today. There is no need for anyone to apologize for the fact that not even Apple has found a way around it!

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Feb 8, 2010 10:52 PM (in response to CMathis)
run the following terminal commands (copy and paste, please)
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sudo chmod a+rx /volumes/*
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Executed "sudo chown -R admin /" by mistake. how do i check everything?

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I was looking in system.log, and it doesn't show which files had their permissions actually changed. Is there any log on the machine where the command was executed, which lists all the files under / that chown was applied to before it was stopped? And would it show what the ownership was changed from? I'd like to go through that list and know the extent of the damage.
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[SOLVED] How to chown files in mounted drive?

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Sudo chown + chmod on system drive?

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