Questions tagged [su]
Substitute User command
128
questions
0
votes
1
answer
100
views
su: failed to execute 1 sudo dpkg-reconfigure locales: No such file or directory
I was configuring a linux server and after an apt upgrade this message came up whenever I try to change the user to root.
If I do sudo su -, su -, sudo -i I cannot change user because it says that
su: ...
0
votes
1
answer
140
views
After run sudo and/or su or su - command, the command prompt not loaded, however the switch user is successful
I saw a maybe similar thread but not sure there the issue is the same:
su command not responding?
I have an Ubuntu 20.04 LTS baremetal server.
After run sudo and/or su or su - command, the command ...
3
votes
0
answers
414
views
Unable to su or ssh as anyone but root on CentOS 7
I seem to be unable to ssh or su as a local user on my CentOS 7 machine as of today.
$ adduser ndejay
$ passwd ndejay
Changing password for user ndejay.
New password:
Retype new password:
$ su ndejay
...
1
vote
4
answers
4k
views
Execute root commands through ssh user
my goal is to execute commands as root user from another linux host through ssh.
The Problem is: The environment doesnt allow to access the root user directly.
The manual way, which works, is to ...
1
vote
2
answers
411
views
How do I run sudo commands with a system user?
I want to run a minecraft server in Docker, so I started following this guide.
In the guide, it is advised to create a system user with a home directory (/opt/minecraft), but without a password (you ...
1
vote
1
answer
721
views
Can't run command under /bin/false user
Centos 8.
There is snowuser:
[snowuser@snowcannon-01 ~]$ cat /etc/passwd | grep snowuser
snowuser:x:1002:1002::/home/snowuser:/bin/bash
[snowuser@snowcannon-01 ~]$ groups
snowuser wheel
There ...
0
votes
0
answers
521
views
Tenable su+sudo and selinux
My Not-A-Sysadmin-Boss wants me to explain this but I can't really find an answer? When using TENABLE SC to scan a RHEL7 system the account used to do the scan connects via ssh then uses sudo to ...
1
vote
3
answers
3k
views
Ubuntu 20.04: su command bash-autocomplete stopped working
I am using Ubuntu 20.04. The su autocomplete stopped working. For example when I type:
su TabTab
It lists the files and directories of the current directory, where as it should list the available ...
0
votes
1
answer
1k
views
How to restrict users switching from su command
How can I restrict users switching by su command?
Suppose there are 3 users (root,user1 and user2) only root and user1 can switch by using su command. root or user1 should not be able to switch to ...
3
votes
0
answers
403
views
Why su command takes to long in nested Debian LXD containers?
I observed that the command su takes too long (30 seconds) when it is executed in a LXD Debian container that is nested into an Ubuntu LXD container. This overhead does not occur Debian containers ...
0
votes
1
answer
125
views
Let one user become another user without a password?
On (most) Linux systems, we can let a specific user su into anyone they want by placing him in the wheel group and making some settings in /etc/pam.d/su.
I want to do something more limited: I want to ...
-2
votes
2
answers
62
views
How to protect from coworkers [closed]
Hello how to protect linux account form other administrators(coworkers) in company who can use your account to steal data and point a police that you are the guy who steal data from company.
if ...
0
votes
1
answer
256
views
Having trouble switching to user using the "su - lfs" command
I am trying to do linux from scratch. I was able to create the user to manage everything (named lfs) and I was able to login using this command. I then powercycled my computer and I am no longer able ...
1
vote
2
answers
1k
views
su: authentication failure (password correct, setup worked before, nothing changed)
Most of the issues I found are related to new installs, root password being disabled by default, or things falling apart after some changes. None of that applies here: in my case nothing was changed, ...
0
votes
0
answers
1k
views
Can not su - root. su: incorrect password
I am trying to switch to root user using the su command.
I am getting the following error
$ su - root
Password:
su: incorrect password
I checked the /var/log/messages and found the following:
...
1
vote
1
answer
243
views
Is this user root or not
I see the following in /var/log/auth.log (system is current Ubuntu).
myserver su[14993]: illegal option minimum_uid=1000
myserver su[14993]: Successful su for jeanbon by root
myserver su[14993]: + ???...
0
votes
2
answers
482
views
Switching to a "role" account, using `sudo` and `ssh` agent forwarding later on – possible?
I want to create "role" accounts for several admin tasks that don't usually require root permissions. For example, consider a www-admin user maintaining files in /var/www.
It seems to me that this is ...
8
votes
2
answers
14k
views
How to switch user given a UID?
I only know the UID of a user, is it possible to switch user using UID in linux distribution like we do using username like su -u someuser?
1
vote
0
answers
286
views
Create a screen. Run said screen as a user. Detach
I'm essentially trying to combo Create screen and run command without attaching and another answer that allowed me to run a script as another user. I want to
SSH from Server 1 -> Server 2 and run a ...
1
vote
1
answer
2k
views
pam_tally2 incrememts before password for su attempts
There is a similar behavior here but I believe this is a different underlying cause, or at least requires a different solution since this failure isn't due to SSH keys.
Our company is undergoing a ...
0
votes
0
answers
319
views
Can you disable su for certain users logged in via ssh?
Basically, I'm running a Mac Mini as a server, and I'm trying to close some security holes. My server has 3 users: admin, git, and server. Each user has public key authentication enabled, while only ...
0
votes
1
answer
2k
views
Sudo not working. How to reset root password Ec2 (AWS)
I installed a SSL certificated the day before. Today I wanted to log in to the server. When I try to "sudo" it gives me the following error message:
sudo: unable to stat /etc/sudoers: No such file or ...
-4
votes
2
answers
2k
views
Restricting su access
I am using rhel7.2 in our envirement.I do not want any user on system to "su" to 2 specific users say "user3 and user4".But "user3 and user4" can "su" to any user in the system.
Let me explain my ...
1
vote
0
answers
6k
views
su: cannot set groups: Operation not permitted
I'm trying to get root access for a user who is initially logged in from a console. I have root access from another method. User does not have a username, so sudo is not an option. Running su returns ...
0
votes
1
answer
276
views
User login without passwords
We have multiple users accounts with /bin/bash shell allocated to them. An another application "su" to these accounts for controlling their service statuses and monitoring purposes. Passwords for ...
0
votes
1
answer
1k
views
RHEL7 - su - command error logging location
I am trying to understand if there is any logging happening for this command in any log file:
$ su - user1
su: user user1 does not exist
I checked /var/log/messages, /var/log/secure and /var/log/...
5
votes
1
answer
8k
views
How to automatically switch to home directory when switching user?
When i ssh to my ubuntu server, i get logged in to my user's home folder.
But when i do su otheruser and enter the password, i get logged in as the otheruser but the home directory stays for the ...
3
votes
2
answers
4k
views
can't login as root on a remote Redhat Server
I am currently working on a remote RedHat server(RHEL version 6.7 x86_64).
I can login as a user by using userID and password which is provided by
the server administrator.
But when I try to login as ...
-1
votes
1
answer
2k
views
Allow winscp access, restrict direct shell access, allow su - for Linux server local user
Is it possible to restrict access for a particular local user in Linux, with below mentioned conditions:
User should have no direct shell access
User should be able to login with command "su -" from ...
0
votes
1
answer
64
views
How can I get su screen PID on Debian8?
I want to run this command by another user (so with su): screen -ALmdS server_mta ./mta-server -n
It's okay: su - server_2 -c 'screen -ALmdS server_mta ./mta-server -n
But I need the PID of screen, ...
1
vote
1
answer
303
views
Why Apache can run a command and root cannot?
I have a server-side script executed by Apache running as www-data. The script runs fine on the server when called remotely (http://example.com/script.sh).
I am trying to run the same script on the ...
1
vote
2
answers
3k
views
Allow www-data to use another user - sudo or ssh
I would like to allow my PHP script (hosted with apache2) to execute commands with another user account.
I don't want another website hosted on the server to be able to connect to that another user ...
2
votes
0
answers
74
views
How do I make su wait before retries in freebsd?
I want to make attempts at using the su command timeout for 1 second between tries. Alas, the Google and StackExchange, and rtfm have not yielded results.
0
votes
1
answer
902
views
Restricting su command in a specific manner
I have a list of system users who have access to almost everything via sudo. Now I would like to restrict their sudo access for command su.
I would like to restrict su command for every user on ...
2
votes
2
answers
1k
views
Linux: Allow user to execute specific command on behalf of any other user
I am trying to find a way to allow user john to execute a command (say echo) on behalf of another user peter without being prompted for password.
I found a thread that I thought would be the answer ...
-2
votes
1
answer
825
views
Is it possible to "sudo su" using ssh in bash? [duplicate]
#!/bin/bash
USERNAME=ksmith
HOSTS="linux1"
YUPDATE="sudo yum -y update"
FIXDATE="sudo -u echo -e 'ZONE="America/New_York"\nUTC=true' > /etc/sysconfig/clock"
for HOSTNAME in ${HOSTS} ; do
ssh -tt -...
0
votes
2
answers
234
views
Restrict su command
I have user1 and user2. Normally, the user root can switch on all users with su command.
I want to restrict su command so that the user root can switch only to user1. It is possible??
1
vote
0
answers
1k
views
Automatically change remote user with sshfs
I have two remote servers, foo and bar. On both servers I have a user git (with different uid and gid). Both servers are running Debian distributions. Both servers have their each others' root ssh ...
0
votes
1
answer
2k
views
SSH tunnel to MySQL running on FreeBSD (Heidi SQL)
I'm trying to use a SSH tunnel to access a MySQL-server running on a FreeBSD 10.1 server. These attempts are done with Heidi SQL (http://www.heidisql.com/).
The SSH daemon on the FreeBSD server does ...
-2
votes
1
answer
21k
views
can't switch to root or use sudo [closed]
I've just come into the following problem:
For some reason I can't use su or sudo:
usr@usr-MS-7816:~$ su
Password:
su: Authentication failure
usr@usr-MS-7816:~$ sudo su
[sudo] password for usr:
...
5
votes
3
answers
4k
views
SSH: su root or sudo? [duplicate]
What is the better option: Using su to switch to root or enabeling sudo? Without the use of sudo an intruder would need to know the password (or key) of a user allowed to ssh and then also the root ...
12
votes
1
answer
76k
views
su: /bin/bash: Resource temporarily unavailable
Unable to switch user to postgres.
Ulimit settings for postgres user is set with reasonable limits. We are not hitting max.
No errors in /var/log/messages.
Error:
BETA -bash-4.2# sudo su - ...
1
vote
2
answers
8k
views
Linux-SSSD: always getting incorrect password when su'ing to domain users, but why?
I've built a new Linux environment at my work place.
I've configured sssd and bound it to one of the Active Directory domains of the company.
I can tell that the sssd is partially working, let me ...
10
votes
4
answers
17k
views
Kernel Tuning with Privileged Docker Container
I'm building a container to tune kernel settings for a load balancer. I'd prefer to deploy those changes to the host in an image using a single privileged container. For example:
docker run --rm --...
2
votes
1
answer
2k
views
Limit su attempts
Is there a way to limit the number of su attempts from a user?
For example, malicious user gets into a user login that has su access. Repeatedly runs su to try to gain superuser access.
This ...
1
vote
1
answer
3k
views
switch to a different user
I'm trying to SSH into a server then switch to a user named "jenkins". As you can see from the commands below, after I run su - jenkins I am still in the root user's home dir, and whoami indicates ...
1
vote
2
answers
4k
views
Linux: How to allow a regular user to "su - anotherUser"?
I wrote a Nagios check script which checks if user peeradmin is able to touch a file in some mount on the server.
Nagios user is: nagios .
I've edited /etc/sudoers and added these lines but none ...
0
votes
1
answer
466
views
Give su permission to LDAP group
I created an LDAP environment and i'm trying to set up a group in the LDAP server that has SU priviledges in all other linux machine that use this ldap server.
dn: cn=superfriends,ou=group,dc=example,...
1
vote
1
answer
3k
views
su: Authentication failure
I have Ubuntu 14.04 server on which I can't use anything that relies on su. This manifests in inability to restart services or even switch users.
root@ci-web1:~# su - mxx
su: Authentication failure
...
0
votes
1
answer
1k
views
Centos : su: incorrect password after bash update
A few days ago I've updated the bash to patch it agains Shellshock and since then I cannot su - root from my regular 'wheelgroupuser' account on Centos 6.5 with WHM.
I'm constantly getting su: ...