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

learn more… | top users | synonyms

5
votes
4answers
396 views

What are the root permissions for a file?

If I type: ls -l file.txt I see that the rights for that file are equivalent to "456": 4 = owner (r--) 5 = group (r-x) 6 = others (rw-) Which the rights for root in this case? Does it have 777? ...
7
votes
4answers
12k 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 ...
0
votes
2answers
26 views

Root to the Minimal

I am building a script to automate and minimize access to root. I am going to try do it via SSH. I am currently having an issue using sed to replace UID and GID 0 shell to /sbin/nologin. Why am I ...
0
votes
0answers
23 views

Is it logical to give root execution to some commands executed by a normal user? [on hold]

Given a C/C++ program that uses some system calls or commands, say for example sockets. In this question the solution gives root access to a normal user to run a specific one executable, which means ...
1
vote
3answers
14k views

Enable root login from GUI

I just installed Mint 16 and I see that root user is not available at login screen. I log in from normal user and went to "Login Window" option and there I set "Allow root login". Then I restarted the ...
-2
votes
1answer
39 views

How can I run a script as sudo and for it to not ask me for a password?

I want to run the following script: #!/bin/bash if grep -qs 'MinecraftServer' /media/kiancross/MinecraftServer/MinecraftServer; then echo "Disk already mounted, server boot will continue" else ...
0
votes
1answer
85 views

Strange bash sytax error depending on sudo usage

I made this bash function to detect if the user running is actually logged in as root user and not using sudo by checking the uid + home directory of the user executing the command: #!/bin/bash set ...
0
votes
1answer
42 views

How to autologin as root to mint 17.1

I would like to know how to autologin as root on mint 17.1? I've been able to login as root from the login screen (by enabling root access in login window settings and changing the theme to clouds). ...
-1
votes
0answers
39 views

Fedora 21 entering Emergency Mode finding Partitions Root and Swap

I'm having problem when it comes to booting in Fedora 21. Steps I took: Turned on the laptop Chose Fedora 21 from the list that includes it, Fedora 21 Rescue and Windows 7 Fedora 21 Loader is ...
1
vote
0answers
17 views

removing `nullok` from system-auth prevents any root password

[ this is a follow-up on my post on ServerFault : http://serverfault.com/questions/661136/root-accepts-any-password-how-to-change-to-a-real-password ] On an old system the root account accepts any ...
0
votes
1answer
18 views

Cannot install Sybase ASE on IBM AIX as root

I have a weird problem where I cannot install a Sybase DB server as root on an AIX virtual machine. I'm logged in as root and launching the installer as such: bash-4.2# ./setup.bin -i console ...
1
vote
2answers
52 views

start process (as root) upon user login

I would like to start a process as root upon each user login. The motivation beside this is, that the process will work on encrypted home folder of particular user folder. How can I achieve this?
18
votes
3answers
43k views

Can I change root's email address or forward it to an external address?

I'm getting a lot of mail in my root user's mail account. This appears to be mostly reports and errors from things like cron scripts. I'm trying to work though and solve these things, possibly even ...
0
votes
0answers
19 views

System sends alert when root-login fails three times

I have a server-system. I typed the password for the user root 3 times the wrong way, and I got an mail like servername : Jan 15 23:06:50 : username : 3 incorrect password attempts ; TTY=pts/6 ; ...
0
votes
2answers
1k views

How to automatically login with root user in Fedora?

I want to enable auto-logon with root user for some specific purpose. It's so boring that every time I power on my PC to study, I have to input user and password.
2
votes
3answers
1k views

how to run shell on a remote server with root priviledge

I want to execute a shell script on a remote server, and the script should be run by root with no password required (or use sudo in the script). Can anyone give me some suggestions?
1
vote
1answer
38 views

Still able to read file after changing permissions

I've made a file as root, and written a string in it. Now I've changed mode to "0" like this: root# ls -al transit/ total 4.0K ---------- 1 root root 6 Jan 5 18:15 27050 root# If I try to tail, ...
1
vote
3answers
92 views

How could I reach root after switching from bash to zsh?

It's very weird that after switching to zsh from bash, I can't access root. I normally use 'su' to login as root after I login as a normal user (username is normalusername) with less privileges. And ...
42
votes
4answers
30k 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 ...
0
votes
0answers
13 views

Error opening terminal: Screen [migrated]

I just installed nano on my Nexus 9, which is rooted. However, when I try to run nano, it says "Error opening terminal: screen." bash-3.2# nano Error opening terminal: screen. Any help would be ...
10
votes
2answers
489 views

Can I make a file only accessible to a script, and not a user?

I have a user with limited access on the system (that is, he is not a sudoer); let's call him Bob. I have a script or a binary which I, the system administrator, trust, and would have no problems ...
2
votes
1answer
121 views

How to run google chrome as root in linux

when I want to run google chrome as root, an error message with this title appears: Google chrome can not be run as root and the body of message is: to run as root, you must specify an ...
4
votes
1answer
372 views

Why does root not have /usr/local in path?

I've noticed that the default path for root on my of my vm's and servers do not include /usr/local/bin sudo -s echo $PATH /sbin:/bin:/usr/sbin:/usr/bin Whereas normal users on the server do have ...
-3
votes
2answers
15k views

“install: missing destination file operand after `rootterminal'”

When I open root terminal then it simply starts a normal terminal. I cannot access root terminal. When I update my root terminal by the following command sudo apt-get update && install ...
2
votes
1answer
47 views

Right way of running a root task/program at background

I'm writing a program that needs to run at the background as root. (for any user) To do this I used the /etc/rc.local file. And it seems to work. The problem that I am experiencing is, when a ...
3
votes
1answer
162 views

Why is $HOME inherited when I start a shell with sudo?

I'm setting up a Vagrant box and I noticed something I found odd. root@box:~# sudo --user=vagrant bash bash: /root/.bashrc: Permission denied vagrant@box:~$ export declare -x HOME="/root" Why is ...
1
vote
3answers
4k views

Get environment variable of other user [closed]

Is there a way I can see the environment variable of an other user? I want to do that as root, so permissions won't be a problem I guess. For the user himself, I use echo $PATH or set | grep PATH ...
1
vote
1answer
462 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 ...
3
votes
2answers
210 views

Is there a graphical sudo (kdesudo, gksudo, su-to-root, …) tool that works passwordless?

Apparently gksudo is not obeying /etc/sudoers, neither does kdesu. Therefore asking the other way around... Is there any su-to-root, gksudo, kdesudo, etc. alike tool, that supports starting gui ...
1
vote
1answer
27 views

load missing library from ~/ without root or symlinks on shared hosting?

So I have a library file that is used by a php module, both of which reside in my home dir on my shared hosted cpanel account. Problem is this library depends on libcrypto.so.6 and libssl.so.6 files ...
2
votes
2answers
107 views

How to retroactively make a script run as root?

I'm writing a shell script, that needs to be run with root privileges. I can check if a user has root privileges with sudo -nv || echo "no sudo", but that doesn't help me, if his credentials are ...
0
votes
1answer
23 views

Disable root password caching

How can I disable root password caching? I looked at This Question, but I didn't really understand how to do it, is not the same as my question but it is indirectly related. I tried adding this to ...
4
votes
2answers
93 views

How to execute a command that requires root permission without sudo?

I'm trying to execute traceroute -d being authenticated as a "standard" user with sudo privileges. However if I run sudo traceroute -d it will be execute by the root user so I'm wondering how can I ...
3
votes
2answers
185 views

How does the 'passwd' command gain root user permissions?

How does Linux know that it has to give euid 0 (uid of root) to only certain process like passwd, setuid, etc. If a process can gain root permissions, will it not lead to potential security breaches ...
36
votes
4answers
5k views

Why is root login via SSH so bad that everyone advises to disable it?

Everybody on the Internet advises to disable root login via SSH as it is a bad practice and a security hole in the system, but nobody explains why it is so. What is so dangerous in enabling root ...
1
vote
1answer
45 views

How can I see the password of another user in Linux?

I made 4 users on my server, but unfortunately I changed the password of the "first" user while configuring the server, but I don't know how I changed it. How can I see the password of users in root?
2
votes
2answers
37 views

change the name for root mails from cron

I have two servers that are synchronized with rsync, one is the failover server of the other, so they both have the same name. Now root mails that are sent to my other account are all named from root ...
1
vote
1answer
42 views

sudoers file and passwd only for selected group

I have 3 users in "production" group: John, Steve and Bob. In "sales" group are: Sam and Jack. Now, I would like to give John permition to change passwords of all users but only in "production" ...
0
votes
1answer
130 views

sudo not working on debian

Why sudo command is not working on my fresh debian installation. I had this error after entering my root password: Sorry try again .. or / and incorrect password attempt EDIT : In my ...
0
votes
1answer
20 views

I moved root partition by error

I'm on a VPS with CentOS 6.5 I was trying to install ASSP so by error i did this command mv -f /* /usr/share/assp and then I can't do anything when I try something like: [/]# dir -bash: /bin/ls: ...
0
votes
2answers
85 views

moving a file to a folder with root privileges in CentOS 7

I am reading a tutorial that wants me to place a script file called script.sh into a folder called /etc/profile.d/. However, when I try to save the script.sh file in that directory, the gedit tool ...
0
votes
1answer
54 views

root cannot access virtual filesystem? [duplicate]

When attempting to check my disk usage under / I found that root did not have access to certain virtual filesystems. I also could not check the permissions on the virtual filesystem. Why is this? ...
2
votes
3answers
44 views

(In)significance of [… ] and tty root processes

A colleague of mine assigned me to perform a root-cause analysis of an enterprise security server sometime ago. We knew the problem resided in one of the processes run by root but did not know which ...
2
votes
2answers
64 views

What are some of the things ROOT can do that could possibly destroy the computer [closed]

I eventually plan on diving into software manipulation, and i want to avoid any and all things that as ROOT could destroy my system. I know tinkering with the file-system are dangerous to mess around ...
1
vote
0answers
25 views

Which Privileges Should Assign For Create Raw Sockets

I want to run an ICMP command to ping an IP Adress at Java: InetAddress.getByAddress("XXX.XXX.XXX.XXX".getBytes()).isReachable(1000); However there is a security restriction that: Normal users are ...
1
vote
1answer
242 views

su cannot execute bin/bash/****

I installed Kali Linux on a VM machine and I cannot change my user to root from the terminal using su. The command sudo works fine but when I try to su, it says "cannot execute bin/bash/****(my user ...
0
votes
0answers
54 views

how to write dd command to replace backup image of root partition?

I have installed rhel6.5 in my pc. After that I have changed some configurations in file system. now I have taken backup image of /dev/sda1 which is a root partition of 15gb in size using the command ...
0
votes
0answers
21 views

How To Increase Linux / (root) size? [duplicate]

I am new to linux. i am using rhel 6. ext4 is my file system my / root file is full. is there any way to increase it? if its possible please teach me how to do it? please explain me in detail, because ...
0
votes
1answer
20 views

attaching to Unix shared segment

Can a UNIX program running as root attach to a shared memory segment created by another user with permissions allowing access only to creator?
0
votes
1answer
48 views

Nginx Static Build - Run as root with a non-root user

I have compiled nGinx statically and it is working fine. How i can create a NORMAL user and run the nginx static bin as root when i start it from the normal user?! Thank you