General :: Unable To Change System Time As Non-Root User
May 6, 2011
I need to edit the system time as a not-root user. I am carrying out the following actions in my program.
1. Read the User Id of the process. User_ID= getuid()
2. Printing Capabilities(Permitted, Efffective, Inheritable)of the process
3. Setting UID = 0, using setuid(0)
4. Calling the prctl(), function to keep capabilities
5.Switching the UID from root to User_ID of the process
6. What we have now is a process with root capabilities as a non root user
7. On printing Permitted, Effective, Inheritable capabilities, I get the following
--> Permitted = 0xfffffeff = Effective
Inheritable = 0x0; with UID = 1001;
8. I then try and set the system time with --> system("date -s 10:00");
9. I get an error: date: cannot set date: Operation not permitted
10. I am unable to understand as to why I cannot set the time even thought the capability bit CAP_SYS_TIME in the Permitted and Effective sets are SET.
I have developed an application, in C language, that should received the EPOCH time (6 bytes) at about every 30 min. What function should I use as a non root user to modify the System Time.? The idea is that the same application could update the System Time. I am using Ubuntu.
Is It possible to change a process running in root-user to non-root-user by setting suid / uid / euid / gid etc... I so please instruct how, when and wat to set in order to change a process running in root-user to non-root user
Im trying to run this program and they say I should not run it as root but as a diff user. how to change from root to dif.user. I am using linux CentOS 5.5. Is it a terminal command? How do i create a diff user and log in as it?
For a user on a Linux host, I need to make everything inaccessible besides his home directory. I have heard that this is usually done by changing the root directory for the user (and setting it to the user's home directory), however I couldn't find the way to do it.
I thought about the chroot command, but it seems it just runs the specified command, considering the specified directory as the root directory. So it seems chroot is not what i need. So my question is: what is the command which changes the user's root directory?
lately i notice that when i add a new user withthe useradd and passwd command, and then try to login using this new account, am being prompted with a message,saying ' you cannot access /home/newuser. that the account doesnot have permission on his home directory. i have even tried go give the user(john) ownership over his home directory with the #chown -R john:john /home/john
I often put together complete computers from spare parts. When I do, I put Linux on them and put my name as the root user. However, I don't build these to keep them for myself.....I usually end up giving them away to someone who needs one and can't afford to buy one. What I would like to do before givi9ng them away is to change the root user name to their name. How can I do that? CAN I do that?
I am running Fedora 12 as Guest OS in VMware Player. I installed Fedora 12 by using a Prepackage VM . The root user name and p/w was supplied by the person who made this appliance. Is there way for me to change root user name and pw
Environment: A 32-bit kernel RHEL5.3 system running on a virtual machine. The root(/) filesystem is on an LV.
Issue: Unable to resize the FS after extending the root LV since it is mounted. After extending the LV, online resizing of the FS was not supported and the root filesystem could not be unmounted while it was in use. On rebooting, I got a kernel panic error. In runlevel 1, I couldn't run chroot, couldn't find the /etc/fstab, root FS could not be mounted, fsck did not run (tried block 31 for second copy of superblock using dd count=1 bs=4k skip=31 seek=1 if=/dev/sda2 of=/dev/sda2), couldn't find any rpm on installation media to install unix-utils rpm. On running commands in runlevel 1,
I have Slackware 12.2 installed on my computer, as well as a Windows Xp. I have a hard drive named '/fat-d', which is formatted to be 'fat' and is normally used under XP. This drive can also be accessed under Slackware, both as root and the normal user.I can not write to the directory '/fat-d' when I am not root, it is normal since 'ls -l' shows that its owner is root and other users have no permission to write. The problem is that, when I tried (as root) to change the owner to the normal user:# chown [normal_user_name] /fat-dI got an error: chown: changing ownership of '/fat-d/':Operation not permittedBut how can the root have no permission to change the owner?
I have a linux (Slackware) machine and the time/date is like, June 23rd 2003, 10:00am (It's 11 here) and I am not able to set the time to have it correct. I change the timezome to Montreal but the time is still wrong.
Is there a way to force it to sync with my domain controler or even another online NTP server?
After upgrading FEdora 13, user ravi was added. Then after few days neel was added. Both of the users were already existing. So when attempting login to neel, we found that every file is owned by ravi. So we did$chown -R neel:neel But after that problem started and when we rebooted the machin, there were no list of users on login screen. (then I connected to that comp remotely, it worked, but somehow I was not able to switch to root) It says incorrect password (though I new it very well). So I went to maintenance mode and changed the root password, and rebooted. Still problem persists.Now I am not able to login as root (from anywhere, login screen , terminal, remote)No list of usernames on login screen ( but i can choose, other and type login-password)
I have just upgraded my laptop from F8 to F10, and I am unable to login to the system as root user.At login, it provides 2 options, one is the user I created and another called 'other'.On selecting 'other' and providing uid/passwd as 'root/<rootpassword>, it says "Unable to Authenticate User"!!However, when I tried to access my windows partition, it happily accepted the root password
I started to use Ubuntu 9.1 today. It's the first version of linux I'm using. So my problem is that I always got a message in terminal, that says "are you root?", when I try to do something with apt-get. Well i tried to install a root, but it didn't work. One thing I almost forgot. Root is the Superuser that should be put on, when I installed the current version of ubuntu right? I don't understand how could it happen that the system didn't put the root on.