Hi guys. I have already rooted my Wildfire with unrevoked3 and worked like a charm. Superuser is OK, I installed Titanium Backup and I installed busybox with it.
But I can't find how to run the busybox shell with root. Can anyone help me?
I downloaded android sdk for my Ubuntu 10.10 (I don't use windows) and I typed as root: ./adb shell and the terminal has not root priviledges.
Is there anyway to do this? Also how to run busybox? Via Terminal Emulator?
I think that the Titanium Backup didn't installed correctly.
My goal is to get a root terminal
Thanks in advance
Assuming that stuff works the same as on my linux computer, you would just su in the terminal emulator, then cd into the busybox directory, then make sure you have execute permissions for it, and then just ./busybox. That should start busybox in shell mode. That's how it should work.I think.
xc1024 said:
Assuming that stuff works the same as on my linux computer, you would just su in the terminal emulator, then cd into the busybox directory, then make sure you have execute permissions for it, and then just ./busybox. That should start busybox in shell mode. That's how it should work.I think.
Click to expand...
Click to collapse
The busybox is executed in my machine not in my phone right?
No, on your phone. Open up terminal on your phone (you can get one off the Market or alternatively connect you phone to the computer and start a ashell using adb), then cd to the directory you have busybox in, and then ececute ./busybox. Remember, you can't put it on the SD card because it doesn't allow execution.
sorry for this Android newbie question..
I installed Titanium Backup on my Desire....but when I ran it, an error message says " Sorry I cannot acquire root priviledges. This application will not work! Please verify that your ROM is rooted and includes BusyBox, and try again".
My Froyo is rooted....but whats this BusyBox and where can I get it and install it?
thanks..
I'm assuming you haven't rooted yet. Turn wifi on. Get an app called "universal androot". You need to get a version at least 1.6.2. It's not in the market so you may have to look around. Install and Open it up. Tick the box that says "soft root". Click the button labelled "root ". When the application force closes, wait 10 second and do nothing. then click on force close. Toggle wifi on. Go to titanium. Press allow when asked for root privileges. If it doesn't come up, look around titanium. It should allow you to instal busybox. Busybox is a set of *NIX utilities that are better than androids builtin. It allows the apps to use more advanced features. And It helps users if they are knowledgeable though to know how to use it.
nope..mine is rooted already via unrevoked3
dinoalbert said:
sorry for this Android newbie question..
I installed Titanium Backup on my Desire....but when I ran it, an error message says " Sorry I cannot acquire root priviledges. This application will not work! Please verify that your ROM is rooted and includes BusyBox, and try again".
Click to expand...
Click to collapse
Same problem here
rooted with revok3
installed rom manager and did a first backup
install titanium n tried to backup apps
It said " Sorry I cannot acquire root priviledges. This application will not work! Please verify that your ROM is rooted and includes BusyBox, and try again"
could some one link me to busybox app for wildfire n guide on how to backup wit titanium
pl reply
realxception said:
Same problem here
rooted with revok3
installed rom manager and did a first backup
install titanium n tried to backup apps
It said " Sorry I cannot acquire root priviledges. This application will not work! Please verify that your ROM is rooted and includes BusyBox, and try again"
could some one link me to busybox app for wildfire n guide on how to backup wit titanium
pl reply
Click to expand...
Click to collapse
Go to titanium backup, go to problems then it,will install busybox
thanks , its worked
Related
I rooted successfully last night and got the app titanium and superuser and busybox. And I wana know what do I use to completely remove apps like moxier mail and some keyboards and quadropop. And what is superuser and busybox and titanium for? Sorry for noobness but ive nevrr rooted b4 so I wana learn.
the_ahmadzais said:
I rooted successfully last night and got the app titanium and superuser and busybox. And I wana know what do I use to completely remove apps like moxier mail and some keyboards and quadropop. And what is superuser and busybox and titanium for? Sorry for noobness but ive nevrr rooted b4 so I wana learn.
Click to expand...
Click to collapse
Remove app with adb.exe in a windows command prompt, or use Titanium Backup (backup software to be installed in your phone, makes backups to sdcard) to remove apps. (never tried it, as a unix/linux/OS X man i like the command prompt)
Superuser gives you the chance to allow/deny apps to have he superuser permissions.
Busybox gives the commands you need, like su, ls, mkdir, pwd, mv, cp, dmesg etc. that you need in the terminal window to do your magic. Unix commands that is. (more or less)
If you want to know what your phone is doing at start up, install Better Terminal and issue the command dmesg (means something like display message.log).
In Titanium Back Up, long press on the application you want to uninstall, it'll open a window or whatever you call it. Here's the "unistall" option
So I'm rooted and downloaded Super User app from market. I have a bunch of root apps but the only app listed in the super user app is Titanium. Any reason why the other rooted apps (Set Cpu, Minfree Manager, etc.) aren't listed?
Have they asked for superuser?
Via EVO on 4G with XDA App
awenthol said:
Have they asked for superuser?
Via EVO on 4G with XDA App
Click to expand...
Click to collapse
No it doesn't
Sent from my CM6 powered device
krazyflipj said:
No it doesn't
Sent from my CM6 powered device
Click to expand...
Click to collapse
We managed to fix this problem the other night on the irc channel. I didn't post anything because it doesn't seem like many people are using superuser.apk. The problem is that superuser needs to install it's own version of the su program to run properly. The current root method replaces su every reboot. When you lose the su that superuser.apk installs it can't control root access anymore and basically any program can request root without a prompt to you. The fix is to just replace the jk-su file in /system/bin/ with the superuser su. Then every reboot it will just use the one that works with the superuser app. I did this a few days ago and haven't had any problems.
The procedure is as follows (you need to use adb):
Go into the superuser app, go to the "settings" tab and at the very bottom choose to update su (it should change from saying original to something like "su v2.3.1-ef").
Plug the phone into usb and make sure you have USB debugging enabled.
Open a command prompt on the computer and goto your android sdk tools folder to run these commands (IMPORTANT NOTE - Make sure you have the phone screen on and unlocked when you run the su command below because superuser will ask you for permission and you need to click yes. It wont prompt if the screen is off or locked and the adb shell will just sit there waiting for a response. As soon as you click yes on the phone you should get a # in the adb shell):
adb shell
su
mount -t rfs -o remount,rw /dev/block/stl9 /system
cp /system/bin/su /system/bin/jk-su
exit
Now you should just reboot the phone and check that it worked by running any program that needs root access that isn't already listed with superuser. I suggest shootme or wifi tether. tether asks when you start or stop tethering and when you allow a mac address in the access control.
richse said:
We managed to fix this problem the other night on the irc channel. I didn't post anything because it doesn't seem like many people are using superuser.apk. The problem is that superuser needs to install it's own version of the su program to run properly. The current root method replaces su every reboot. When you lose the su that superuser.apk installs it can't control root access anymore and basically any program can request root without a prompt to you. The fix is to just replace the jk-su file in /system/bin/ with the superuser su. Then every reboot it will just use the one that works with the superuser app. I did this a few days ago and haven't had any problems.
The procedure is as follows (you need to use adb):
Go into the superuser app, go to the "settings" tab and at the very bottom choose to update su (it should change from saying original to something like "su v2.3.1-ef").
Plug the phone into usb and make sure you have USB debugging enabled.
Open a command prompt on the computer and goto your android sdk tools folder to run these commands (IMPORTANT NOTE - Make sure you have the phone screen on and unlocked when you run the su command below because superuser will ask you for permission and you need to click yes. It wont prompt if the screen is off or locked and the adb shell will just sit there waiting for a response. As soon as you click yes on the phone you should get a # in the adb shell):
adb shell
su
mount -t rfs -o remount,rw /dev/block/stl9 /system
cp /system/bin/su /system/bin/jk-su
exit
Now you should just reboot the phone and check that it worked by running any program that needs root access that isn't already listed with superuser. I suggest shootme or wifi tether. tether asks when you start or stop tethering and when you allow a mac address in the access control.
Click to expand...
Click to collapse
Hmmm cp /system/bin/su /system/bin/jk-su didn't work. I ls /system/bin and don't see jk-su listed just su...
krazyflipj said:
Hmmm cp /system/bin/su /system/bin/jk-su didn't work. I ls /system/bin and don't see jk-su listed just su...
Click to expand...
Click to collapse
What root did you use? I did mine manually so there may be some differences if you used a one click.
Edit: I just looked at noobnl's one click root and it uses the same script that contains the line:
#copies busybox su
cat /system/bin/jk-su > /sdx/su
so it should definitely be there even if you used his one click.
When you run the command "ls -l /system/bin/jk-su" what do you get?
I get this:
ls -l /system/bin/jk-su
-rwsr-sr-x root root 26264 2010-09-18 06:10 jk-su
Please delete
krazyflipj said:
Please delete
Click to expand...
Click to collapse
Did you get it working? After you updated su through the superuser app then it started working so that is why it asked you for permission when you were in terminal. The problem is that if you reboot without applying the rest of the fix to replace jk-su then you will lose the updated su and it will stop working.
richse said:
Did you get it working? After you updated su through the superuser app then it started working so that is why it asked you for permission when you were in terminal. The problem is that if you reboot without applying the rest of the fix to replace jk-su then you will lose the updated su and it will stop working.
Click to expand...
Click to collapse
Hey Richse, I'm trying to get this to work but it isn't.
rose1 said:
Hey Richse, I'm trying to get this to work but it isn't.
Click to expand...
Click to collapse
can you give me more information, what errors are you getting or what exactly is happening?
richse said:
can you give me more information, what errors are you getting or what exactly is happening?
Click to expand...
Click to collapse
Okay, I did the one click root method that is stickied. Then I did
adb shell
su
after doing su, I initially saw on the phone that unknown user was asking for superuser access. Of course, "unknown user" is me so I granted it. Then I saw the # then I went ahead and did
mount -t rfs -o remount,rw /dev/block/stl9 /system
That worked fine . The line repeated itself which indicates that it worked. When I do
cp /system/bin/su /system/bin/jk-su
it then says cp: not found.
Just to give you a little more info, I just restored my phone with odin to factory defaults, then I updated to the DI07 update. Then I installed the final clockwork mod recovery, then I did the one click root method. Then I installed superuser in the system/app folder.
rose1 said:
Okay, I did the one click root method that is stickied. Then I did
adb shell
su
after doing su, I initially saw on the phone that unknown user was asking for superuser access. Of course, "unknown user" is me so I granted it. Then I saw the # then I went ahead and did
mount -t rfs -o remount,rw /dev/block/stl9 /system
That worked fine . The line repeated itself which indicates that it worked. When I do
cp /system/bin/su /system/bin/jk-su
it then says cp: not found.
Just to give you a little more info, I just restored my phone with odin to factory defaults, then I updated to the DI07 update. Then I installed the final clockwork mod recovery, then I did the one click root method. Then I installed superuser in the system/app folder.
Click to expand...
Click to collapse
I'm not sure why cp doesn't work, it just means copy. An alternative to try is to delete jk-su and replace it with the su you updated. Use these commands in place of the cp command:
rm /system/bin/jk-su
cat /system/bin/su > /system/bin/jk-su
Make sure you do this after updating su in the superuser app and without rebooting in between. Let me know if you have any problems.
followed instructions. no errors but i still have no programs asking for permission. i had wifi tether downloaded before and it worked. I downloaded shootme to see if it would ask for permission and it didnt - but it works. neithe one is lited in superuser either.
listed is:
adfree / quickboot / root manager / startup manager ( 3 of them) / super manager / unknown ( spawned right after i followed instrution)
any ideas
uninstall supersuser and reinstalled:
listed apps now:
adfree / busybox installer / root explorer / rootmanager / sufbs / tit backup
again not sure is it is correct. but seems to work "I THINK"
spdwiz18 said:
followed instructions. no errors but i still have no programs asking for permission. i had wifi tether downloaded before and it worked. I downloaded shootme to see if it would ask for permission and it didnt - but it works. neithe one is lited in superuser either.
listed is:
adfree / quickboot / root manager / startup manager ( 3 of them) / super manager / unknown ( spawned right after i followed instrution)
any ideas
uninstall supersuser and reinstalled:
listed apps now:
adfree / busybox installer / root explorer / rootmanager / sufbs / tit backup
again not sure is it is correct. but seems to work "I THINK"
Click to expand...
Click to collapse
When you go to update su in the superuser app does it say "original" and then change or does it stay updated after you reboot?
richse said:
When you go to update su in the superuser app does it say "original" and then change or does it stay updated after you reboot?
Click to expand...
Click to collapse
what i have:
cwm 2.5.1
root 2.1.1
di07
now for the long and skinny:
i checked. went to superuser and it told me 2.3.1 -ef i then HARD rebooted, came back with no root.and superuser told be original, hard reboot again, still no root. So one more time- third time is a charm - i have root and superuser told me 2.3.1 -ef
thanks again for the help.
i think my phone might not be total stable.. lol
any ideas.
also - i thought about upping root to most recent but unsure if i need to unroot or if i can install over it. your thoughts on this matter!!!!
spdwiz18 said:
what i have:
cwm 2.5.1
root 2.1.1
di07
now for the long and skinny:
i checked. went to superuser and it told me 2.3.1 -ef i then HARD rebooted, came back with no root.and superuser told be original, hard reboot again, still no root. So one more time- third time is a charm - i have root and superuser told me 2.3.1 -ef
thanks again for the help.
i think my phone might not be total stable.. lol
any ideas.
also - i thought about upping root to most recent but unsure if i need to unroot or if i can install over it. your thoughts on this matter!!!!
Click to expand...
Click to collapse
I doubt you need to update root. The root I used was the original manual method by joeykrim. The one click just automates that method. There is no reason why you should have to reboot multiple times to get this working. You basically just replaced a file with a similar file and the script that was installed when you rooted uses that file to create a new su every time you reboot. Personally, I would wipe to stock with Odin and then use the manual root method to make sure nothing funny is going on with your phone. When you rebooted and the su was "original" you didn't lose root, it just meant that superuser wouldn't work. For now, as long as the 2.3.1 -ef sticks around superuser will work just fine. As an alternative you could try noobnl's newest stuff. Looks like he made it compatible with superuser, so I think that would negate the need to use this type of fix. I'm not sure what he did to add the compatibility but you could probably ask him.
if you flash noobnl's latest kernel, it includes superuser and it works perfectly.
rose1 said:
if you flash noobnl's latest kernel, it includes superuser and it works perfectly.
Click to expand...
Click to collapse
The only issue I see with that is you have to use a DG27 kernel. If you want to use a DI07 kernel you still need to use this fix.
richse said:
The only issue I see with that is you have to use a DG27 kernel. If you want to use a DI07 kernel you still need to use this fix.
Click to expand...
Click to collapse
Very true. I didn't think about that.
I have latest Noobls kernel flashed on top of DI07 and this fix did not work.First thing that dint work is i never got SuperUser prompt after i typed su in adb shell,i got su in windows but no prompt on the phone.
To make it short i did the whole procedure from BetterTerminal(now i got su prompt) rebooted and back to same problem.Man,this been bugin me for two days now,sometimes i reboot the phone and i have root permissions then i reboot again and they are gone!
Big question is:is everybody on Epic have same issue or is it just on certain phones,kernels or roms?
I am booting from SD Card for the NC. I am trying to install busybox so I can can get the full version of Titanium Backup to work properly.
The error message I'm getting is /system/xbin/ could not be mounted as RW, the install will fail.
If I click on install it just hangs there until I finally press and hold the power button to perform a reboot.
Is there something that I'm missing on this?
Thanks,
Dubg
It sounds as if you don't have SU. Head to Market and update/install the SuperUser app. Also, try letting Titanium Backup install its own BusyBox (it'll prompt for it if it doesn't detect one).
You can also try getting BusyBox off the market, look for BusyBox Installer or some such.
Hi all,
I got my KF few days back, Rooted it, before I could install the android market, got forced update to 6.2.1. 2 days ago saw this new root method using BurritoRoot. Tried rooting it, seems successful, however, now when I arrived at the home page, I cant even open the Superuser app at all. It goes the same for the Root Explorer - prompting:
"Root Explorer has not yet managed to obtain root access. Because of issues with Superuser, this often happens the first time the app is run but is usually fine from then on. Click ok and restart the app and try again. Make sure u respond correctly to the Superuser prompt." Then it comes with a force close.
Seriously I do not know whats wrong with it, now i cant even use the root explorer for me to install Android Market.
Anybody can help me with it?
Million Thanks.
did you use the superuser-2.apk ?
http://forum.xda-developers.com/showthread.php?p=20645033&highlight=superuser-2+apk#post20645033
b63 said:
did you use the superuser-2.apk ?
http://forum.xda-developers.com/showthread.php?p=20645033&highlight=superuser-2+apk#post20645033
Click to expand...
Click to collapse
Im using the ROOT INSTALL - Method 1 and I downloaded the file from Rootzwiki, apparently the file is named "com.noshufou.android.su-1.apk". and I used the following commands:
adb root
adb remount
adb push su /system/xbin/su
adb shell chown 0.0 /system/xbin/su
adb shell chmod 06755 /system/xbin/su
adb install com.noshufou.android.su-1.apk
adb reboot
So which means I should use the Superuser -2.apk instead?
What should I do now? Download the Superuser-2 file and repeat the whole process again???
thanks.
yes - the new version seems to be the only one working with burritoroot
consider to use KFU to make things easier:
http://forum.xda-developers.com/showthread.php?t=1399889
should be option 2 (permanent root with superuser)
Hi all,
Ive spent to weekend reading about rooting and ROMS/Kernels and decided to try it. I used a root kit found here from Mskip (great kit). Ive sucessfully rooted, and then sucessfully installed Smooth Rom 4.3 with the Motley kernel.
Ive downloaded Titanium Backup and Rom Manager. TB worked and I did a backup (which I now cant find) (i have ES File Explorer). I upgraded to Titanium Pro, and now when I open the app is states root was denied. I remember when I first opened TB SuperSu asked me to grant it access. After a reboot I opened SuperSu and stated a Binary update was necessary and performed it.
Now TB pro states root was denied, when I open SuperSu there is nothing there in the apps list, and I dont know how to manually grant TB root access.
Sorry if this is noobish, not sure what to do and I dont want to keep going without a backup.
Edit: When I try to backup in ROM Manager I hit backup, it brings up the notification to name the backup, I hit ok and nothing happens.
cam75 said:
After a reboot I opened SuperSu and stated a Binary update was necessary and performed it.
Now TB pro states root was denied, when I open SuperSu there is nothing there in the apps list, and I dont know how to manually grant TB root access.
Click to expand...
Click to collapse
That sort of sounds like the SuperSU "su" update might have failed. Can you get root with other apps? (e.g. go in to a terminal emulator and type "su")
Note there is a chicken-and-egg problem if (either) SuperSU/su or Superuser/su fail: they need root themselves to remount /system so that the "su" binary can be updated.
If no apps can get root, then you sort of have "lost root", and the fix is to manually insert the .apk and su binary into /system/app and /system/bin/su (or /system/xbin/su depending on flavor!) either with a flash package in recovery, or manually via the adb shell command line (with custom recovery running).
HTH
PS you should be able to just manually start the recovery and do a backup in the meantime, no? The fact that ROM manager isn't doing anything could either be a lack-of-root problem or something else (a busybox dependency?)
bftb0 said:
That sort of sounds like the SuperSU "su" update might have failed. Can you get root with other apps? (e.g. go in to a terminal emulator and type "su")
Note there is a chicken-and-egg problem if (either) SuperSU/su or Superuser/su fail: they need root themselves to remount /system so that the "su" binary can be updated.
If no apps can get root, then you sort of have "lost root", and the fix is to manually insert the .apk and su binary into /system/app and /system/bin/su (or /system/xbin/su depending on flavor!) either with a flash package in recovery, or manually via the adb shell command line (with custom recovery running).
HTH
PS you should be able to just manually start the recovery and do a backup in the meantime, no? The fact that ROM manager isn't doing anything could either be a lack-of-root problem or something else (a busybox dependency?)
Click to expand...
Click to collapse
thx for the quick response, however much of that is WAY over my head. I opened terminal emulator and typed su and this is what popped up. 1 [email protected]:/ $
When TB is opened it states error "sorry I could not acquire root privilegdes. this applidation will not work. please verify that your rom is rooted and try again. this attempt was made using the "/system/xbin/su" command.
I dont see busybox in my app drawer
cam75 said:
thx for the quick response, however much of that is WAY over my head. I opened terminal emulator and typed su and this is what popped up. 1 [email protected]droid:/ $
Click to expand...
Click to collapse
If the SuperSU app (and companion binary) were working correctly, you should have seen one of those "Accept / Deny" pop-up messages coming from the SuperSU app... assuming that you didn't previously grant root access to that terminal emulator app. You didn't mention that happening.... ?
Also, usually the command prompt usually changes from $ to # when you have root, but not always; the explicit way to check would be to (after you have tried the "su" command) to type in "id" and hit return at the prompt - that will tell you explicitly if you are root or not. (That's the letter "i" followed by the letter "d" followed by the return key).
From the way you describe this, it is sounding like you lost root.
I gotta go watch part of the game. In the meantime, perhaps you should at least create a backup manually.
As I said, the simplest fix-up would be to get Superuser.apk/su or SuperSU/su re-installed into /system/app and /system/{x}bin/su (it seems that chainsDD and chainfire use different locations).
There might be floating around someplace a flashable zip file with this stuff in it - to be used for "lightly rooting" a stock ROM after a custom recovery is in place. But things have been in flux recently with both the SuperSU (chainfire) and Superuser (chainsDD) kits because of the JellyBean multi-user support, so the version you might need is important. So you would have to do the research to figure out where.
gotta go - good luck.
bftb0 said:
If the SuperSU app (and companion binary) were working correctly, you should have seen one of those "Accept / Deny" pop-up messages coming from the SuperSU app... assuming that you didn't previously grant root access to that terminal emulator app. You didn't mention that happening.... ?
Also, usually the command prompt usually changes from $ to # when you have root, but not always; the explicit way to check would be to (after you have tried the "su" command) to type in "id" and hit return at the prompt - that will tell you explicitly if you are root or not. (That's the letter "i" followed by the letter "d" followed by the return key).
From the way you describe this, it is sounding like you lost root.
I gotta go watch part of the game. In the meantime, perhaps you should at least create a backup manually.
As I said, the simplest fix-up would be to get Superuser.apk/su or SuperSU/su re-installed into /system/app and /system/{x}bin/su (it seems that chainsDD and chainfire use different locations).
There might be floating around someplace a flashable zip file with this stuff in it - to be used for "lightly rooting" a stock ROM after a custom recovery is in place. But things have been in flux recently with both the SuperSU (chainfire) and Superuser (chainsDD) kits because of the JellyBean multi-user support, so the version you might need is important. So you would have to do the research to figure out where.
gotta go - good luck.
Click to expand...
Click to collapse
Thanks again.
Im watching Superbowl as well. I didnt grant Terminal access. I rebooted into recovery and restored to right after I rooted. SuperSu auto updated through the play store, and stated the binary need updated. I canceled that. TB and ROM manager are showing up in SuperSu. So now Im rebooting into recovery again to after I installed the Smooth Rom/Motley Kernal. I did make a backup of where SuperSu lost root. I now have three backups.
Question on installing the SuperSu apk file. I want to be sure I do it right, if needed. Download the file on my 7. it will go to my download folder. Move it to the system folder and open/run it? what do i do with the current SuperSu folder?
thanks again
I went to my restore point after root and reinstalled 4.3 Smooth ROM Mkernel. I did not take the SuperSu update, (ill wait for the next update) and everything is fine TB an ROM manager working fine, did a backup in both.
Thanks for your help on this.
cam75 said:
Question on installing the SuperSu apk file. I want to be sure I do it right, if needed. Download the file on my 7. it will go to my download folder. Move it to the system folder and open/run it? what do i do with the current SuperSu folder?
Click to expand...
Click to collapse
Dealing with .apk's is not that difficult - drop them into the correct place and reboot.
In Android, apps (.apk files) are stored in one of two places: /system/app or /data/app. It is even possible for two versions of an app to be on the phone - one in /system/app and one in /data/app; that is how upgrades of factory-installed apps happen: the pre-installed app is in /system/app... and never gets deleted (read-only filesystem), whereas update versions get dropped into /data/app. Generally you can just drop an .apk file into either of these locations, wipe the dalvik cache and reboot. During the android boot, these files are compiled into .dex objects in the dalvik-cache, and various version, consistency, rights and permissions are cross-checked.
Think of it this way: when you boot a new ROM for the first time, /data starts out completely empty. Everything needed to support each pre-installed app in /system/app gets created automatically during the android layer start-up.
The "su" native binary is a bit more complicated - it needs to be:
- owned by the user.group root.root
- be executable
- be setuid/setgid
Imagine that you had a copy of these two files on your "/sdcard". If you booted into the custom recovery, you could affect these changes like this:
C:\foo> adb shell
# mount # show what is already mounted
# mount /sdcard # if needed
# mount /system # if needed
# mv /system/app/SuperSU.apk /system/app/SuperSU.apk.old
# cp /sdcard/SuperSU.apk /system/app/SuperSU.apk
# mv /system/xbin/su /system/xbin/su.old
# cp /sdcard/su /system/xbin/su
# chown root.root /system/xbin/su
# chmod 6755 /system/xbin/su
# cd /
# umount /system
# exit
C:\foo>
*
As a practical matter, it is probably easier to just make sure to make a fresh backup if you are about to update the su binary - in case anything goes wrong. It might also be useful to use a root-aware file manager to remount the /system partition in rw mode prior to doing the "update su binary" procedure in the SuperSU app.
Good luck
* note that SuperSU and Superuser apps choose different locations for the su executable file - one uses /system/bin/su and the other /system/xbin/su. There might also be a symlink between these locations. Best policy is probably to examine a known-working installation to determine how to proceed.