sudo - Execute a command with superuser privileges.

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1answer
70 views

Does user have to logoff then back on if I change /etc/sudoers?

Redhat Enterprise Linux 5.10 (No we can't upgrade, please don't ask.) I have a user, 'tina' who is logged into the system. I need her and user 'lu' to use chmod, chgrp, and chown commands for certain ...
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1answer
30 views

Now visudo won't work at all

RHEL 5.10 When I do visudo I get this error: chuck 75->visudo visudo: /etc/sudoers: Permission denied visudo: /etc/sudoers: Permission denied Listing of sudo exe file and /etc/sudoers: chuck ...
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1answer
152 views

RHEL sudo still not allowed for user 'tina' [duplicate]

I'd like 2 users, 'tina' and 'lu' to execute a few utils like /bin/chmod. Here's the relevant portion of my /etc/sudoers file. tina,lu ALL=/bin/chmod /bin/chown /bin/chgrp Then I logged in as ...
1
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1answer
66 views

RHEL How to login as different user from shell?

Redhat Enterprise Linux 5.10 (No we can't upgrade.) This is related to my other question. I would like to be able to login as another user, like 'tina', so I can test her sudoer permissions. My ...
4
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1answer
44 views

Unable to get sudo lecture working on CentOS 7 server

I'm trying to enable the sudo lecture every time someone executes sudo, but I can't seem to get it working at all. I found a similar question here, in which someone states that if you don't see any ...
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0answers
14 views

RH software collections enable for command run with sudo

We are using RH software collections for python34 and have the following in /etc/profile.d/scl_enable_python34.sh source scl_source enable rh-python34 This works perfectly for interactive users. ...
0
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1answer
33 views

How to delete password for current account

I just installed Ubuntu 15.10 on my new desktop. However, I want to erase the password of it. I followed the instructions here. I now can successfully login with out password, but I cannot use sudo ...
0
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2answers
122 views

Why did sudo not work in CentOS? [duplicate]

I am using Centos and want to use sudo command to run as root. But after input the root password, it always prompt to ask me input the password again. I am pretty sure the password is correct since I ...
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4answers
7k views

Allow paswordless user to change to another passwordless user

I have two users dev and tomcat neither of them have a password. How can I allow dev 1 do su - tomcat without having him having to enter any credentials? 1 connects with ssh keyfile
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2answers
60 views

Can we install a package through a shell script? [duplicate]

I'm trying to write a shell script so that when I reinstall my Ubuntu again. I could just run script and retain all the packages. And I'm planning to pass password in form of argument. My question ...
0
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1answer
59 views

Running .sh Script With Sudo Results In Different Output

I'm seeing some really strange behavior in a script I'm working on.What I have is an svn hook that gets run whenever a commit is made to an svn repo. It runs a sqsh command that generates another ...
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2answers
146 views

Failed to open config file '/dev/fd/63', error: No such file or directory for wpa_supplicant

When I do this: sudo wpa_supplicant -D nl80211,wext -i wlp4s0 -c <(wpa_passphrase "some ssid" "password") I get Successfully initialized wpa_supplicant Failed to open config file '/dev/fd/63', ...
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0answers
28 views

Why does visudo compare the contents of `VISUAL` to a fixed whitelist? [duplicate]

This is on Ubuntu 15.10 I'm trying to get a better understanding of visudo and how it works. The documentation explains that visudo will consult the VISUAL environment variable and compare it against ...
1
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1answer
112 views

sudo: unable to resolve host “hostname”

I'm testing a VPS provider, and recently created a virtual machine with a hostname testserver using an ubuntu template. This VPS provider reserves and bills resources by the month, so if you create a ...
1
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3answers
13k views

sudo: no tty present and no askpass program specified

I have a perl script that I fork from another script that I launch from a web browser via mod_perl. The forked script (which ends up running as apache) needs to sudo service X stop as part of a ...
2
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0answers
282 views

No candidate version found for sudo

When I tried to install sudo in Debian 8.2 via aptitude install sudo I got an error: No candidate version found for sudo. The source list is standart. Here is the Source list: deb http://httpredir....
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4answers
830 views

Allow user to run a command with arguments (which contains spaces)

I want to allow one user to run grep (through sudo), and to grep for one specific string in one specific file. I don't want to allow this user to be able to run grep on all files. The user doesn't ...
0
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1answer
162 views

what is meant by Defaults:visiblepw in /etc/sudoers file

Im newbie to linux, when i was reading sudo config file, there is a line Defaults visiblepw . i read the definition for the visiblepw in manual page visiblepw By default, sudo will refuse to ...
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0answers
33 views

kerberos: Why sudo command creates a ticket?

I have successfully set up a kerberos (MIT) / OpenLDAP debian server which can authenticate users with kerberos and get SSH access according to OpenLDAP groups. I must mention that as this is a ...
3
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1answer
36 views

How to temporarily change locale for sudo?

To change the locale of the current user like export LANG=en_US.UTF-8. But this environment variable doesn't affect the root user. When I use sudo the display language remains default. How can I ...
3
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2answers
42 views

Feedback when entering passwords, without revealing length

I often SSH into a machine and use sudo on it. When entering passwords, I'm always afraid that another window will steal the focus. However, I don't want to display asterisks (with pwfeedback, for ...
1
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1answer
96 views

Set sudo umask apart from the user calling it

The problem: I set my umask for my user to be 0077. Now I use sudo instead of su when I need super-user access, and the problem is that whenever I execute a software installation using sudo with ...
0
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3answers
98 views

I want to copy a remote txt file via SSH, but without using root access

I want to copy my hosts to remote /etc/hosts but it doesn't work. I know root SSH access makes things easier, but IMHO root SSH access is a little dangerous. cat /etc/hosts|ssh samba2 "sudo su -c "...
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5answers
131 views

copy file from user to another in linux

I'm trying to copy a file from my home directory to another user's directory. I have a sudo access for the other user with no password. I tried doing something like: sudo secondUser cp /home/...
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1answer
36 views

How can I avoid being prompted for a password in this script? [duplicate]

I’m using Amazon Linux. If I login as my “otheruser” user, and create a script, test.sh, with this text sleep 5 ; sudo reboot now I can login and run the script like so … [davea@mydevbox ~]$ sudo ...
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2answers
93 views

What does “sudo su -s /bin/bash - <username>” do?

Could someone kind enough explain to me what this command means? sudo su -s /bin/bash - foo I was told that if I want to switch to a different account in this case "foo" without knowing its ...
1
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1answer
36 views

Pass Environment Variable to Sudo AWS ec2 sudo node

I am new to linux and AWS. I have a node.js server running on an EC2 instance. I am running the following command to keep it running endlessly and on port 80: $ sudo node app.js & Now when I ...
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6answers
742 views

What is the threat of a user trying to sudo without permission?

I was sshing into a certain computing system that I use. I was trying to follow some Linux instructions that involved sudo, and tried a few times to enter the password unsuccessfully, before realizing ...
2
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1answer
36 views

Exporting a variable so it appears in a script sourced through sudo

I have a bash script/s which has a "main" script which is run as sudo. Variables are declared in this script. Then it sources another commands.sh script, however this script uses sudo to drop back to ...
2
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1answer
313 views

Running sudo restricted commands by creating soft link

I have sudo access to one of our test machines and the following are the commands restricted for me: user_sree@sel8585:~> sudo -l user_sree's password: User user_sree may run the following ...
5
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2answers
76 views

Why is it safer to give sudo rights to a non root user?

I have recently installed Amazon Linux on EC2 to run NodeJS applications. It is recommended to run them as a non root user. This user will still be me so there is no concern that someone else will ...
1
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0answers
24 views

How does shutting down require sudo except when done through a GUI? [duplicate]

If I want to shut down my machine programmatically or on the terminal, I must do sudo poweroff or sudo shutdown. If I want to shut down my machine through my window manager and desktop environment, I ...
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2answers
65 views

Why when I try to execute a program as normal user I get denied, and when I execute it with sudo I get “Not Found”

In order to execute mysqlbackup I have to execute it as root. Here's the example when I execute it as normal user: mysqlbackup --compress --user=root --socket=/var/lib/mysql/mysql.sock --backup-dir=...
0
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1answer
109 views

How can I execute any command as a normal user without sudo?

Is it possible to assign the sticky bit to sudo in order to execute any command as a normal user? Let's suppose that we have the user test and then: test@test$ apt-get update But I don't wanna use ...
3
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1answer
81 views

how to: Please sudo, do _not_ setup any environment, especially $SUDO_USER?

I want to start a process as another uid and it should not need any information from $(env), so I strip the environment prior to the sudo -u powerlessuser /bin/processCmd, that is I run this env -i ...
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0answers
53 views

Authentication required to edit Sudoers - User not listed

I made a small typo in my sudoers file, nothing a simple pkexec can't fix. The problem is that when I added my user with "adduser name" and added "name" to visudo, as well as the root and sudo groups:...
1
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1answer
47 views

how to do administrative commands without sudo?

Is there a possibility to grant administrative privileges to the current logged in user forever? So I don't have to type sudo everytime I want to do something?
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2answers
64 views

run a sudo command, specifying the password on the same line

I would like to do something like that: sudo -p password rm /a/file Can I put the password and the user on the same line? My Sudo version is 1.8.9p5
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0answers
26 views

sudo not working on two systems, but runs on remainder of the networked systems

This question is about sudo implementation and I was unable to find a similar question here in the forums. I'm running Redhat 6.6 on my network of 14 servers and 8 workstations. On the primary NIS ...
5
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2answers
289 views

How to automaticaly enter sudo's grace period upon login

Knowing that giving a user a sudo's grace period right from the point when he/she login might be a security issue, I still think it will be a beneficial trade-off between security and usability in my ...
0
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1answer
89 views

I can't use the “sudo” command on my server [duplicate]

After I edited the /etc/sudoers.d/my_sudoers file with nano I was unable to use sudo. The following errors are giving when trying to use sudo: sudo: parse error in /etc/sudoers.d/my_sudoers near ...
1
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1answer
45 views

SOLVED Missing partition / drive Centos 7

I was trying to change permissions on one of my NTFS partitions and I think I have messed something up. I entered the below command on Centos 7 and now the partition is missing from the File Manager. ...
10
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1answer
114 views

Possible to check ability to sudo before sudo'ing?

I'm writing a small utility program. I'd like it to attempt to sudo-run something if required. That is: if file permissions don't allow the current user to operate on a particular file (and sudo ...
15
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4answers
12k views

sudo cannot open /etc/sudoers

sudo does not work. I have Arch Linux installed on a USB key formatted with BTRFS. Here's the output when I run 'sudo': $ sudo sudo: unable to stat /etc/sudoers: Permission denied sudo: no valid ...
2
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3answers
2k views

Why does sudo su work, but su does not? [duplicate]

I have tried this on Fedora and on Ubuntu. kshitiz@kshitiz:~$su su: Authentication failure kshitiz@kshitiz:~$sudo su root@kshitiz:/home/kshitiz# I am entering the same password in both the cases.
3
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4answers
158 views

How to execute multiple commands remotely on few servers?

I am trying to automate these steps so that I don't need to do this on every machines manually. I need to install latest app server software (abc.tar.gz) on all the unix boxes. I need to do this in ...
6
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3answers
6k views

Write to a file without redirection?

I am writing a regular compiled application that needs to create a special file and write a magic cookie into it. I can’t write the file directly from the application, the system security model ...
2
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4answers
5k views

How to restore to permissions to sudoers file with no password?

The complete story: I launched an Amazon EC2 "Tier" (VPS) running RHEL 7.1 and created a key for ssh. EC2 automaticly crates a user called ec2-user for new Rhel VPSs, and it have the permissions (in ...
1
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1answer
102 views

Mass deployment of package to multiple Linux servers across different continents

I'm new to here and want to raise an interesting question about mass remote configuration of Linux servers. Imagine you get a list of IP addresses for 100 servers with a fresh install of Ubuntu, ...
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1answer
31 views

Mechanism behind password storage in sudo

Whats the mechanism behind sudo that stores the password for all subsequent calls to sudo?