Questions tagged [root]

In an Ubuntu system, root is the superuser, the owner of most system files. Questions about the root user or accessing superuser privileges may use this tag; the / or /root directories may be more appropriately tagged with "filesystem"

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46
votes
7answers
42k views

Why don't gksu/gksudo or launching a graphical application with sudo work with Wayland?

I installed Ubuntu 17.10. Now I am having trouble with gksu: $ gksu -dg synaptic No ask_pass set, using default! xauth: /tmp/libgksu-HgUjgQ/.Xauthority STARTUP_ID: gksu/synaptic/8760-0-alex-XPS-15-...
75
votes
1answer
194k views

How do I boot into a root shell?

When booting to the graphical desktop fails we sometimes are recommended to boot into a "root shell" or to boot in "recovery mode". How do I do that?
50
votes
8answers
286k views

How do I get permissions to edit system configuration files?

I can't seem to edit and save config files in the root system (eg: /etc/dhcp/dhcpd.config); it just says "permission denied" or the save option is blocked in the text editor. I'm pretty sure I'm a ...
209
votes
22answers
135k views

Why is it bad to log in as root?

I've often come across posts on forums or other websites where you see people joking in such a manner about running/logging in as root as if it's something awful and everyone ought to know about it. ...
149
votes
5answers
945k views

How to enable root login?

I would like to enable the root account on my Ubuntu installation. I realize the security implications of this.
103
votes
7answers
56k views

What is the difference between “gksudo nautilus” and “sudo nautilus”?

I've been using gksudo nautilus and sudo nautilus through Alt+F2. What's the difference? They look very similar!
379
votes
11answers
717k views

Execute sudo without Password?

Inspired by this question.... I am the sole person using my system with 12.04. Every time I issue a sudo command; the system asks for the user password (which is good in its own way). However I was ...
117
votes
7answers
460k views

How do I run a 'sudo' command inside a script?

To do a patch manually I must type this command sudo ./playback_delete_data_patch.sh 09_delete_old_data_p.sql There is a space just before the 09: sudo ./playback_delete_data_patch.sh [space] ...
35
votes
9answers
147k views

How to find out root password for installing software

I'm trying to install the NetBeans IDE in my Ubuntu and in the process it's asking for my root password which I don't remember. I know my sudo user password. How can I recover my root password?
39
votes
14answers
26k views

Why is there no option to login as root?

Why does Ubuntu not allow the GUI users to login as root at the time of system start up like administrator in Windows? Why they are restricting us to login only through the terminal?
75
votes
4answers
1.1m views

What is the default root password?

I installed Ubuntu 12.04 LTS (Precise Pangolin), 64 bit. Nowhere was I asked to set password for root. I just installed AccuRev SCM software. It was installed under the /root folder by default. Now I ...
101
votes
8answers
388k views

/usr/bin/sudo must be owned by uid 0 and have the setuid bit set [duplicate]

I have run following command accidentally sudo chown [username] -hR / Now sudo su getting error: sudo: /usr/bin/sudo must be owned by uid 0 and have the setuid bit set How to Solve This?
34
votes
8answers
42k views

I need an equivalent of gksu in 18.04

I've read a lot of threads about gksu being removed from many Linux flavours, including Ubuntu 18.04. Many state that gksu is an abomination and no user should ever need to use anything like it. I ...
11
votes
6answers
54k views

How do I resize root partition?

I have a dual boot setup with Ubuntu and Windows 7. I need to shrink my root Ubuntu volume in order to get some free space to create a new partition. Are there any Windows based tools that will do ...
11
votes
2answers
34k views

Installing programs in root vs home partitions?

I'm a new Linux user and a Windows convert. I tried Ubuntu (Dapper Drake) a few years ago and liked it quite a bit, and I'm in the process of installing Xubuntu 13.10 along side Windows7 on my brand ...
81
votes
3answers
33k views

When to use pkexec vs. gksu/gksudo?

There are two general ways to run applications graphically as root (or, more generally, as another user). Programs like gksu, gksudo, and kdesudo are graphical frontends for sudo. In contrast, pkexec ...
95
votes
4answers
1.3m views

How do I login as root?

I want to login as root, but when I enter sudo -s and enter password, this message is shown: "you are not in sudoers file", and when I enter su and enter password, this is shown: "authentication ...
9
votes
1answer
19k views

Run command at boot as root

I need to run a bash script at boot-time as superuser in Xubuntu. I don't know where to start. I have to do something described in a Arch Linux guide. That guide says exactly: Add following at the ...
145
votes
5answers
954k views

How to enable ssh root access on Ubuntu 14.04

I´d like to enable the ssh root access on Ubuntu 14.04. Editing the /etc/ssh_config (PermitRootLogin yes) didn't affect anything.
63
votes
5answers
77k views

How are administrators supposed to read root's mail?

What is the Ubuntu way for system administrators to receive system notifications, which typically take the form of e-mail sent to the root account? Examples of such notifications are the output of ...
43
votes
5answers
40k views

How to NOT become a root user? Are administrators root?

I installed Ubuntu on my PC. To log in, I use the username and password I created during installation. Does this mean I am a root user? If yes, then how do I become non-root? It looks like non-root ...
61
votes
8answers
589k views

“No root file system defined” error while installing ubuntu

I am new to linux/ ubuntu and just downloaded the v11 of ubuntu to learn linux. I faced this "No root file system is defined" error while trying to install it. This is how I was proceeding - ...
22
votes
7answers
26k views

What are the benefits of sudo over su?

What is the actual benefit that Ubuntu (or Debian derivatives) achieve by disabling root user? Everywhere I read, it says to prevent unintentional damages for inexperienced users. I want to know what ...
43
votes
5answers
146k views

Change owner of internal hard drive partition from root to user

I have a number of drives internal and external. Some are partitioned. Most mount automatically at boot (all did at one point). One partition is owned by root and therefore does not mount ...
15
votes
5answers
72k views

How to fix sudo after “chmod -R 777 /usr/bin”?

I entered chmod -R 777 /usr/bin and now sudo is not working. It says sudo must be setuid root. Some advice online said to run chown root:root /usr/bin/sudo chmod 4755 /usr/bin/sudo. On entering ...
15
votes
3answers
10k views

Changed permissions of / to user [duplicate]

I stupidly ran sudo chown -R carlos:carlos / and carlos is my user. This changed all files to be Carlos and I could not boot up again (because the root files were now owned by #1000) and I cant get ...
66
votes
7answers
121k views

mysql doesn't ask for root password when installing

I used apt install mysql-server to install MySQL on Ubuntu 16.04 but during the installation, it did not ask for root password. After installation I got ERROR 1045 when I tried to login as root and ...
19
votes
5answers
27k views

How do I open Deja Dup as root?

I wanted to backup /var/cache/apt/archives using 'Deja Dup' but it keeps saying >> Could not backup the following files. Please make sure you are able to open them. /var/cache/apt/archives/lock ...
8
votes
5answers
70k views

Sudo not available in guest login

When I login as guest I am unable to execute any command with sudo. E.g.: sudo ps returns: sudo: unable to change to sudoers gid: Operation not permitted How can I fix this?
61
votes
3answers
89k views

How do I disable remote SSH login as root from a server?

For security purposes my company wants me to not allow anyone to be able to log into our Ubuntu server as root remotely over SSH. We still want the root account to exist, we just do not want it to be ...
20
votes
3answers
153k views

“You are not the owner…” message when trying to access folder

In the properties menu of this folder the permission is set to "root" user and group, it shows the message "you are not the owner, so you cannot change these permissions." I am indeed the owner and ...
13
votes
4answers
250k views

How to run applications as root?

I am having some strange issue with Kate and Kwrite. When I click on Open File, it crashes with segmentation fault. I am a complete newbie to Linux, and I think the issue is that I am not running ...
11
votes
2answers
32k views

Block a command from sudo user

I don't need an administrator to change my root password. I don't want any sudo user to execute this command: sudo passwd $root I have tried it in the sudoers file using the following command: %...
9
votes
2answers
3k views

What specific bad things happen when gedit is used with sudo?

I read this answer explaining that "sometimes" root can own something at /home/$USER directory. Can anyone give an example how to prove it. Just give a test case when something really bad happens, ...
149
votes
11answers
151k views

How can a script check if it's being run as root?

I'm writing a simple bash script, but I need it to check whether it's being run as root or not. I know there's probably a very simple way to do that, but I have no idea how. Just to be clear: What's ...
44
votes
8answers
227k views

How to configure ADB access for Android devices?

I'm using Ubuntu 12.10 and I have installed Android SDK, set it's path in my user .bashrc and it works. The problem is that my phone requires adb to be ran by root for permissions, but running adb ...
50
votes
4answers
89k views

How do I set persistent environment variables for root?

To create persistent environment variables, I add the script file to /etc/profile.d directory, for example: # my script export MY_VAR=var_value This works properly for current user: alex@alex-64:~$ ...
15
votes
2answers
81k views

Sudo comes up with an error, cannot run anything as root

For some reason, when I try to run any programs (I am trying to run a rootkit hunter: rkhunter) as root on the command line with sudo like this: sudo rkhunter Then I get this message: You must be ...
10
votes
2answers
22k views

How to get sudo to prompt you for a password each time

I find that if I execute something using sudo that then if I execute something else soon after also using sudo, that it does not prompt me for my password, and although this can be inconvenient in ...
8
votes
3answers
22k views

Home folder in `root` and not in `home`… I'm confused!

I have an issue with my home folder and this are giving me some permission problems. I've installed an application that tells me that I have no permission to save in /home/username/Desktop, but in ...
8
votes
2answers
10k views

Regain Sudo rights after removing from admin group [duplicate]

I accidentally removed myself from the admin group when editing the user. Now I can no longer use sudo. The error says: ber is not in the sudoers file. This incident will be reported. I booted up ...
14
votes
2answers
8k views

How to hide files and folders in Nautilus?

I want to hide, most of the folders in root (/) using Nautilus. Probably the only folders in / I want shown are /home and /tmp. In addition to hiding folders, I also want to hide two files: initrd....
1
vote
1answer
316 views

The installation window don't show a root file system for choose in the installation of Ubuntu, the manual didn't help me [duplicate]

First of all, I have a new laptop Acer Aspire A315-53-386P with Windows 10. I was starting to install Ubuntu in the computer and then I didn't understand the problem, so I investigated and I erased ...
50
votes
2answers
99k views

Disable root account in Ubuntu?

I was asked for root credentials to setup my printer in Ubuntu. This seemed to be caused by a bug. And the suggested workaround is to create a root password. Since it is default that no root password ...
55
votes
5answers
442k views

How to change root password in ubuntu?

I am trying to change root password in my Ubuntu system. This is what I did: ashot@ashot-desktop:~$ sudo passwd root passwd: Authentication token manipulation error passwd: password unchanged ...
53
votes
10answers
225k views

How do I allow non-root access to /ttyUSB0?

Since I updated from Ubuntu 10.04 (Lucid Lynx) to Ubuntu 12.04 (Precise Pangolin), I am unable to access the device connected in /ttyUSB0 if I don't have root access. To be more specific, I use a USB-...
16
votes
3answers
39k views

Run apt-get without sudo

This might be a very naive question, but I wanted to know how I could give multiple users access to a single computer without making them root users. How would I give them limitted sudo access such ...
18
votes
5answers
8k views

How to make /sbin/shutdown, /sbin/reboot etc. require sudo again in 16.04?

For whatever reason, we do no longer need to be root (or using sudo) to run /sbin/shutdown, /sbin/reboot etc. This seems to be because those executables are now symlinks to /bin/systemctl which ...
6
votes
4answers
5k views

Is it possible to open directories as administrator?

I want to have a root privileges on some directories. How can I do this?
9
votes
5answers
10k views

Why does Ubuntu force users to create a password upon installation?

There's been one problem I've had since I installed Ubuntu to run alongside Windows, I assume this would also be the same if it was installed to replace the other operating system as well, the ...

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