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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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 ...
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. ...
195
votes
11answers
372k views

How do I copy files that need root access with scp?

I have an Ubuntu server to which I am connecting using SSH. I need to upload files from my machine into /var/www/ on the server, the files in /var/www/ are owned by root. Using PuTTY, after I log in,...
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 ...
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.
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.
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] ...
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!
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?
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 ...
86
votes
4answers
989k views

Changing from user to superuser

How do I change from user to superuser (root)? What command do I use in the Terminal to switch to root? I have tried --help but I get lost with all the listed help. I'm looking for a recent download/...
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 ...
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 ...
75
votes
1answer
195k 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?
74
votes
6answers
97k views

Read / Write permissions in /opt directory

I installed Android Studio in my /opt directory without a hitch and have been using it. Recently, though, Android Studio informed me of an update. It won't perform the update, however, because it says ...
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 ...
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 ...
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 - ...
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 ...
58
votes
2answers
286k views

How to come out of root user?

I just gained root access following steps from the http://www.wikihow.com/Become-Root-in-Ubuntu. My prompt get changed from $ to # sign, indicating I have root access. Now I have come out or log out ...
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
226k 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-...
51
votes
4answers
124k views

Adding NOPASSWD in /etc/sudoers doesn't work

On 14.04 here. I SSHed into my machine, added the following line to /etc/sudoers: myuser ALL=NOPASSWD: ALL And then tried running: sudo mkdir /etc/blah ...and I'm being asked for my password. ...
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 ...
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 ...
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:~$ ...
47
votes
6answers
420k views

How can I permanently grant root access to a user? [duplicate]

Possible Duplicate: How do I grant sudo privileges to an existing user? I've been searching for the answer to this but all I find is "It's not a good idea" or "We don't recommend it" and some ...
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-...
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 ...
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 ...
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 ...
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?
39
votes
2answers
23k views

.dbus folder in home folder belongs root

I have a folder ~/.dbus in my homefolder that is only read and writeable by root: drwx------ 3 root root 4096 Feb 17 17:30 . drwx------ 2 root root 4096 Feb 17 17:30 session-bus Is this the ...
38
votes
7answers
684k views

How to run Terminal as root?

When we want to run a programs as root we use sudo, gksu, gksudo and etc. Now my question is how do we can run a Terminal as the root user in Terminal? I tried with using gksudo terminal and gksu ...
37
votes
3answers
517k views

How do I set the root password so I can use su instead of sudo? [duplicate]

Possible Duplicate: How to know my root password? I'd like to define a password for root so that I can use su directly, without having to prepend it with sudo. And because I'd like to log in as root ...
37
votes
6answers
64k views

Cannot remove file from trash that was put there as root

I know about the dangers of using root access so please forego the lectures. I try to be careful and will be doubly so from now on. I was using the file browser with root access in order to change ...
35
votes
3answers
10k views

I accidentally ran “sudo umount -a” and now have no access to anything

Now I can't remount anything and get access back. How can I fix it? sudo returns sudo: effective uid is not 0, is /usr/bin/sudo on a filesystem with the 'nosuid' option set or an NFS filesystem ...
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?
34
votes
4answers
239k views

How can I become the owner of a file/folder that root owns?

I had a bad habit of storing my wallpapers in /usr/share/backgrounds, and decided to move them all into Pictures. Well, the problem is that most of them are now read-only since they are owned by root. ...
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 ...
32
votes
2answers
101k views

How to make files accessible only by root?

I'm using Ubuntu and I'm here to know is there any way to modify access of a specific application so that it can only root has access to it? Currently that application can be launched by general ...
31
votes
2answers
105k views

What is the difference between 'su -' , 'sudo bash' and 'sudo sh'?

I would like to know what is the difference between su - sudo bash sudo sh I cannot login as root while doing su - because I do not have the root password - I mean I have my user password with ...
30
votes
6answers
3k views

What would happen if I created an account called 'root'?

If I created a user account in Ubuntu called root, would it automatically have root permissions? Break the system? Cause a glitch in the matrix? What would happen?
30
votes
5answers
357k views

cp - cannot create regular file : permission denied

I want copy to /lib/udev but gives error cp -f /tmp/ok_pcscd_hotplug.sh /lib/udev cp:cannot create regular file /lib/udev/ok_pcscd_hotplug : Permission denied I am root , but I can't understand . ...
29
votes
6answers
275k views

How do I open a folder as root?

More specifically the /etc/apt/ folder. I need to delete some files and replace /etc/apt/sources.list with a newer version.
29
votes
5answers
5k views

Creating a Git repo at / (root) for tracking settings?

So I use Git mostly for development purposes, but I just realized that I could use it for storing versions of the settings files I have on my Ubuntu installation. My proposed setup is: git init a ...
28
votes
5answers
28k views

Is it necessary to have a /home and /swap partitions in 20.04

Is it necessary to have a /home partition in Ubuntu Desktop 20.04? I read somewhere about a home file in /root partition... Does the same go to the /swap partition? Can someone set up a guide for New ...
26
votes
1answer
138k views

How to run Bash script as root with no password? [duplicate]

Possible Duplicate: How do I use sudo in my script without needing a password? I want to run a bash script as root with no password prompt. I tried visudo with no luck(your_username ALL=(ALL) ...
23
votes
3answers
565k views

What is the default root password when was never set at installation time? [duplicate]

On a standard desktop installation, I created my administrative and user login. Further with some applications, the system ask for the root password. So my question is: What will be the default ...
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 ...

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