The "root" account is the most privileged account on a Unix system.

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3
votes
1answer
16 views

Software like Iceweasel and LibreOffice wont run without root/sudo

I recently decrypted my home directory by making a backup of my home directory, deleting the directory, and then replacing it again with the backup (followed a guide). Ever since, I can no longer run ...
8
votes
1answer
626 views

Lightweight virtualization on Linux with user isolation

What Linux-on-Linux virtualization technologies provide user isolation? Specifically, I want root in the virtual machine not to have any privilege on the host. This was not the case for LXC, but was ...
11
votes
4answers
19k views

Why is Debian's root shell colorless?

Are there any security concerns? What is the best way to enable it?
1
vote
1answer
6k views

switching from user to root and revers (FreeBSD)

I want to make some modification with root and then with my user, in fact I want to install sudo and he give me the error in the first step: cd /usr/ports/security/sudo make install clean ...
0
votes
1answer
29 views

install .deb package locally without using sudo [duplicate]

I am using Debian in my office which is controlled by an administrator. I want to install rescuetume. I downloaded the .deb file in my local disk and I want to install it locally. Every time I do ...
36
votes
4answers
23k views

Reserved space for root on a filesystem - why?

I understand that by default, newly created filesystems will be created with 5% of the space allocated for root. I also know you can change the defined space with: tune2fs -m 1 /dev/sdXY What I'm ...
3
votes
3answers
2k views

Problem with vim when logged in as root

When I login as root or edit a file by sudo mode all of the options in my /etc/vimrc are not working (e.g. highlight line-number etc.)
3
votes
1answer
48 views

How to determine if X server runs with root privileges

This is a one-liner: Is there a way/command to check if the X server is run as root or as user? This was supposed to be a one-liner but alas... I recently upgraded my Arch Linux box. After the ...
36
votes
5answers
3k views

Becoming root from inside Vim

Sometimes I start editing configuration files in /etc using Vim, but forget to use sudo to start Vim. The inevitable result then is that after finishing my edits I encounter the dreaded notice that I ...
1
vote
2answers
813 views

How to auto log on with root user in Fedora?

I'm a newbie in Linux, and I want to enable auto log on with root user for specific purpose. It's so bored when every time I power on my PC to study and I have to input user and password.
3
votes
2answers
406 views

Linux SSH logging via PUTTY

I have Linux console, managed from Windows. Can login to Linux console from MSTSC service of Windows, as xrdp is installed on Linux. However I cannot login via Putty with SSH connection. It's ...
-3
votes
2answers
33 views

How do I run as a limited user while logged in as Root, and another question

Is there a way to, on linux, do: run as limited user when logged in as root? (like sudo but vice versa, so instead of GRANTING rights, it limits them, i.e., for use with "bundle install" for missing ...
0
votes
1answer
40 views

How should I change root@mydomain when I send from mail() php function?

I've installed sendmail in Ubuntu as below: apt-get install sendmail Then I sent an Email to test, I received Email from root <root@mydomain>. I checked the content of /etc/aliases, but it ...
1
vote
2answers
59 views

Unable to get rid of root user and privileges

I am told that the most basic security to set up in Linux is to change the superuser name from root to something obscure so I run these steps to add new user $ /usr/sbin/adduser new_username $ ...
4
votes
1answer
54 views

how to verify if root password changed correctly

I have an OpsWare task, that changes root passwords on a massive number of servers, by replacing the root's password hash in /etc/shadow file. I need a script of some sort, which preferably runs ...
6
votes
3answers
10k views

How to get back sudo on Ubuntu?

I have done this: sudo chown -R myname /usr/ and now I can't use the sudo command because of this error: sudo: must be setuid root And as I read this means that the owner of this file ...
1
vote
3answers
63 views

Vim Error 'E212: Cannot open file for writing', when trying to create new files outside of home dir

I am running Wheezy Debian. When I try to create a new file in a directory other than my home directory, such as /var/www, I get the following error in vim: E212: Cannot open file for writing. I ...
16
votes
4answers
1k views

How universal is sudo?

I was writing some instructions on how to install something (TeX-related - if you don't ask, I won't ruin your day by supplying more details) and used sudo to install system-wide. Someone commented ...
0
votes
2answers
2k views

Changing root password does not change sudo password

I'm trying to change the password that get's asked when doing sudo. I'm in Ubuntu. Doing 'sudo passwd' or 'sudo passwd root' does give me the two new password questions, and it successfully changes ...
2
votes
1answer
25 views

Desktop app run by admin user (but not explicitly with sudo) takes file ownership of shared file

Similar to http://stackoverflow.com/questions/15143614/file-ownership-changes-to-root-after-saving-from-a-program-in-ubuntu but I can't use the answer since I'm not running a command-line app as sudo. ...
5
votes
1answer
178 views

No password to run command as root for fixed command? [duplicate]

Is it possible to define a rule in sudoers to allow one user to run one well defined command as root, without password or other authentication except being the right user? Are there alternatives to ...
2
votes
1answer
48 views

Does root not require a password to log in as a user?

Does root not require a password to log in as a user even though a password has been set for that user? When I am logged in as "root", su user logs me in as "user". There is no prompt for a password. ...
0
votes
2answers
71 views

Openning root terminal by keyboard shortcut

I am using Debian Linux and I am setting some shortcuts on it. So in keyboard window I went to shortcut, added gnome-terminal, and set Ctrl + t as the keys. But in Debian we also have "Root ...
1
vote
4answers
107 views

How to correctly enable sudo for user in Fedora 20

I followed this question in order to enable sudo command for my created user. So I added it into the wheels group and edited the /etc/sudoers file accordingly. But what I don't get about this is when ...
0
votes
2answers
78 views

Error when running X11 application as root

I get this wierd error when I run applications as root. **(gedit:630): WARNING **: could not open X display No protocol specified Unable to init server (gedit:630): Gtk-WARNING **: Cannot open ...
2
votes
3answers
317 views

Is this command safe to run from / as root

find . * -depth -print0 | xargs -0 rmdir It finds and removes all empty folders (including hidden ones) recursively. I only tired it on my home folder and a pendrive in Linux PC and it worked but I ...
0
votes
2answers
31 views

On Arch Linux Partitioning [closed]

I've been going through the Arch Linux beginner's guide and I'm a bit confused on partitioning the OS. It says I can either have just a root partition or a root and /home partition. What are the ...
2
votes
1answer
65 views

su not asking for password

My su does not ask for password. When I run su it simply logs me in to root. I tried su - root then it asks for password. Now, because of this kdesu runs applications with root rights without ...
2
votes
1answer
37 views

Copy file from USB drive to a desktop loaded via a LiveCD

I have booted my computer using a LiveCD and want to copy a file from a USB drive to the LiveCD loaded desktop. I want to copy a file from the USB drive to the desktop environment in memory, which ...
3
votes
1answer
128 views

Some software runs only by root terminal

I'm facing this odd situation here, programs such as gparted, furiusisomount and Rstudio never run by clicking on their icons in the applications menu or by running them with terminal as a normal ...
1
vote
1answer
60 views

login scenario and root ssh access block

I'm kinda new to linux so bear with me. I followed a tutorial on how to grant root access to other users and what I did was, in /etc/passwd/ I changed the other users' uid/gid to 0:0. The problem is ...
5
votes
1answer
348 views

I changed /etc/sudoers, and now I can't run as sudo

I messed around with the sudoers file without really knowing what I was doing using this link. Assume I did everything that was in the top answer along with editing it with vim and not visudo. How do ...
2
votes
0answers
12 views

Why does xdg-open text_file differ from sudo -u me xdg-open text_file?

If I run the following command, the text file opens in my preferred editor (kate). $ xdg-open text_file However, if I try the following, where sparhawk is my username, I get several warnings, and ...
0
votes
2answers
74 views

Does Linux unmount the root partition when the partition is about 80% full? [closed]

Summary Linux seems to be unmounting the root partition, /dev/sda6. I noticed that sda6 is about 80% full. Does Linux unmount this root partition when it gets 80% full, to stop you adding more files? ...
2
votes
1answer
670 views

Vim Error E138: Can't write viminfo file $HOME/.viminfo!

I'm afraid I've run into something rather strange. When I open a file normally, vim README.txt, everything is fine. But upon sudo vim README.txt, the file renders blank, and gives me a E138: Can't ...
0
votes
2answers
71 views

How to get permission for editing fstab file in debian [duplicate]

I wanted to change my fstab file to be able to solve "Error mounting" (I tried to delete the last line of fstab file) # /etc/fstab: static file system information. # # Use 'blkid' to print the ...
2
votes
3answers
201 views

How do I drop root privileges in shell scripts?

The "--up" option in OpenVPN is normally used for routing etc. And so it is processed before OpenVPN drops root privileges to run as nobody. However, I am invoking shell scripts that need to run as an ...
1
vote
1answer
106 views

Granting SAMBA rights and privileges requires root password

Given a default Ubuntu installation, I get the following myusername@EARTH:~$ sudo bash root@EARTH:~# net rpc rights grant myusername SePrintOperatorPrivilege Enter root's password: Failed to grant ...
1
vote
1answer
75 views

How to change permissions/owner or delete Downloads folder (owner: root wheel)?

Something strange happened with my Downloads directory on my Mac OSX v 10.7.5. All of a sudden I wasn't permitted to save anything to the directory. The directory is in users/kelly/ and is the only ...
0
votes
1answer
47 views

Execute scripts without decrypting them

I have a set of scripts (bash, ruby, python) and want to put everything into a container like file so I can deploy this container on a lot of servers. This scripts need to protect from accessing other ...
0
votes
1answer
66 views

Rooting Linux via mysql

I have a CentOS 5.6 x86 installed. I have full access to mysql but it seems I have forgotten Linux root password. How I can access the root via MySQL? Is it even possible? Update: MySQL Version is ...
1
vote
2answers
66 views

live dd over a mounted read-only root partiton

I'm trying to conceive a firmware update mechanism for a Linux-based embedded system without an additional initrd/initramfs/whatever. From within the running system which has a read-only mounted root ...
1
vote
2answers
128 views

Why can user have lower permissions than group or other? Who can change them?

It is my understanding that the owner of a file user can have lower permissions than group or other. What is the justification for this? Can only root and the owner change the permissions on a ...
2
votes
1answer
61 views

Is there a way to run a privileged command upon successful SSH login (not necessarily with shell or PTY)?

I'd like to run a privileged command upon successful SSH logins at the server's end. However, this has to be in the server configuration (sshd_config or anything else that cannot be manipulated or ...
0
votes
0answers
58 views

Debian wheezy using gnome classic requires root for system modifying changes

I am using Gnome classic on Debian Wheezy, and I sometimes get a popup for package updates. The UI prompts for a root password, and will only accept root. Is there some way for me to add my account to ...
0
votes
1answer
481 views

Is it possible to run vlc as root?

I installed VLC player using this old video. I don't know how to access other users, but root itself only, so I don't know if the video is outdated or works at all, anyway can I install VLC on root ...
1
vote
2answers
83 views

In Linux, why do you need to be root to write to /proc/sysrq-trigger?

WARNING: THE NEXT KEY COMBINATION WILL CRASH YOUR COMPUTER Ok, I get that this is an administrative tool and all, but I realized that any user can do ALT + SysRq + C. This link explains what I'm ...
1
vote
1answer
45 views

Meaning of entries in /etc/securetty?

I've been given a set of entries to apply to /etc/securetty, what does each of them mean? console tty1cd / tty2 tty3 tty4 tty5 tty6 ttyS0 ttyS1 I'm especially interested in the "tty1cd /" entry. I ...
1
vote
1answer
50 views

Why doesn't setuid not work? [duplicate]

I want my program can only be run by user xyz using root privilege. So I set setuid with: chmod u+s program1.sh ls -l program1.sh rwsr-x--- 1 root house 1299 May 15 23:54 program1.sh And I let user ...
1
vote
1answer
240 views

OpenELEC, non-root user, home directory, SSH

I'm running OpenELEC on Raspberry Pi As you know, directory /storage is a shared home folder between user root and user openelec This makes a problem when you want to setup ssh key authentication for ...