su is a utility to run a shell or other command as another user (root by default).

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3
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0answers
21 views

When running 'su - username', pam_group doesn't add additional groups from /etc/security/group.conf but sshd login does?

I am having trouble determining why su doesn't behave as the PAM configuration would imply. In short, using su to become another user should load secondary groups according to PAM configuration, but ...
0
votes
1answer
46 views

Is there a way to see which user is logged into the system and has switched with “su”?

There are many person that may have access to the system and use a common user with more grants. How can I see which user is running a command? is there a way to use "ps" for that?
-1
votes
2answers
58 views

Is it possible to write a script that run su or sudo command without typing password? [duplicate]

Is it possible to write a script that run su or sudo command without typing password?. I googled and its said that su doesn't read password from buffer. So is there any solution?
3
votes
2answers
208 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
0answers
23 views

limits.conf modification doesn't work

On a SLES 9 machine I added the line: vi /etc/security/limits.conf USERNAME hard cpu 70 but when I check it with "ulimit -a": SERVER:~ # su USERNAME USERNAME@SERVER:/root> ...
0
votes
1answer
25 views

/etc/sudoers file help in giving access to all command in UNIX

/etc/sudoers file help in giving access to all command in UNIX. I read it has rules specified like #root ALL=(ALL|ALL):ALL that specifies root accesses. My question is when we execute a command ...
0
votes
1answer
148 views

Unable to su into an account: could not open session

in my Linux machine - red-hat I successfully to login to different users as the following su - userC [machine@Linux ~]$ pwd [machine@Linux ~]$ /Users/userC but only in one user I get the ...
1
vote
1answer
29 views

How to propagate TSTP while running a program as a different user

I'm running a terminal application via "su" in this fashion: su -c "/path/to/app --args" username This is done from a root context, and 'username' is a less privileged user in the system. The ...
0
votes
1answer
130 views

Bash script class path issue with java

Content of /opt/scripts/jvm/jvm.script.sh #!/bin/bash JAVA_HOME='/java' PATH="$PATH:/$JAVA_HOME/bin" java -cp ./classes:./lib com.mystuff.bar.foo.myclass & Content of /etc/init.d/init.script.sh ...
1
vote
1answer
199 views

Ubuntu runuser command?

I am creating a bash script that requires to run commands as a specific user. As a result I am using the command: runuser I have tested this script and it works perfectly in Ubuntu Server 14.10. ...
2
votes
1answer
44 views

Problem with either su username -c “./script.sh” and sudo -u username bash -c “./script.sh” and Java classpath

I am seeing some strange behavior that has led me to wonder how the environment differs when running either of these 2 commands, versus using su username and then running the commands as the user one ...
1
vote
2answers
69 views

Fedora: How can I add myself back to sudoers file?

I've accidentally removed myself from sudoers file by doing usermod -G user group without -a, and now I am not in the sudoers group. I've tried doing su - and entering root's password but it says su: ...
1
vote
1answer
42 views

Accidentally deleted /bin/su

I was working in /bin on my Ubuntu system and ended up deleting su via a typing error while trying to do other editing. So now I have no way of swapping back and forth between users and root. I have ...
5
votes
2answers
62 views

Permissions depending on how you login: ssh/su/sudo

As user I have access to a remote linux machine where I can: sudo su - other_user Among other things, this allows me to add my own public key to authorized_keys for other_user, which effectively ...
3
votes
1answer
31 views

su - -c 'll' other_user results in error, how can I run this other user's alias?

In current bash session, I just want to change to another user for some bash command. The command is aliased to some script defined in another user's .bashrc or .profile. Am I able to make it ...
1
vote
1answer
237 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 ...
1
vote
0answers
40 views

Some commands does not work in su envirorment

I have logged in to CentOS 5 machine with normal user and then I used su command to login as root user. Now commands like ifconfig, useradd, userdel are not working on machine and it gives command not ...
2
votes
2answers
668 views

Unable to pass the password to su in a script

I am writing a build script. This script has to copy a file in the end. This file will be placed in another users home directory and it is also necessary that the file belongs to this second user. My ...
2
votes
3answers
741 views

What mechanism prevents any user from accessing any other user's files via root?

On a multi-user system, what protects against any user accessing any other users files via root? As context, the question is based on my understanding as follows: There are two commands related to ...
3
votes
3answers
54 views

Understanding a couple of points regarding root privileges

I just wanted to confirm my understanding of a couple of things related to root privileges. Is it correct that: The user name "administrator" is not a reserved name with implied privileges, it is ...
0
votes
1answer
102 views

Is it possible to set the users .gitconfig (for git config --global) dynamically?

I have the problem, that we login to the systems as our own users johndoe and then have to do a sudo su - root to be able to do administrative tasks. We have the system config files in a git ...
1
vote
2answers
235 views

Pass arguments to a command run by another user

I have a bash script that is supposed to take some arguments and then run in a different user: test.sh #!/bin/bash sudo su user2 <<'EOF' echo $1 EOF However it prints blank: $ ./test.sh ...
0
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2answers
162 views

How can I sudo su and change directory just after?

I would like to create an alias that does something like this: alias userYYY='sudo su userYYY; cd /a/path/that/only/userYYY/has/access' So then from my command line, I am logged in with a sudoer ...
2
votes
2answers
119 views

how to write a script that will run commands after su, without using -c

I'm trying to automate a standard activity on a system I do not have root access on. The administrator of the systems have given me authority to run sudo su - 'user' command, and only that command. ...
1
vote
1answer
50 views

Why can't I login in as the ftp user?

After installing vsftpd I have the user ftp on my system. I assigned a password to this account. However, I still cannot login as the ftp user (on the command line, without any ftp-protocol involved). ...
1
vote
1answer
221 views

Permission denied when trying to run script as other user

I'm trying to run a script as another user that starts a piece of software (Etherpad), which is run like so (from root): su -c "/var/www/etherpad-lite/bin/run.sh" -s /bin/bash etherpad but I'm ...
5
votes
1answer
181 views

Getting the process-id out of command launched with “su -c”

I am running a java program inside a shell and writing the process-id to a text file. So when I do this: nohup java app.Main > /dev/null 2>&1 & echo $! > /var/run/app.pid It works. ...
5
votes
1answer
738 views

What does su - `whoami` command do?

I am running a script in my project and I see this command su - `whoami` I am having a few basic questions: What does this command do ? What is the significance of `` quotes outside the whoami ...
3
votes
1answer
74 views

Difference between sudo -s and sudo su -

It might be a duplicate and I'm pretty sure I already show an answer to that somewhere, but I wondered what are the difference in term of right and variable and other stuff between sudo -s and sudo su ...
2
votes
1answer
74 views

What do I need in my script to be able to change ownership of a directory structure that belongs to root to the current user running the bash script?

My bash script has the following section: su root -c chown -R smithb:other /export/home/smithb/workspace/rootownsit/ exit The directory rootownsit and its two sub directories were created and is ...
4
votes
2answers
64 views

Use non-root user configuration for root account

When I work with the terminal and use su or sudo to execute a command with the root user's permissions, is it possible to apply the configuration of my "non-root user" (from which I am invoking su or ...
3
votes
2answers
725 views

Sudo Su automated login

I want to automate the login process with sudo su. I have seen lot of questions on these, but none of them are working for me. Automate login with sudo and su Here's my what I tried so far echo ...
2
votes
1answer
2k views

How can I run as another user?

This is the bash code that should be runned. So first it substitutes the user to openproject and than runs all the code su openproject -c "bash -l" cd ~/openproject git checkout Gemfile.lock git ...
3
votes
1answer
40 views

Switching users without the - symbol

I had to switch to a different user earlier for something that I was working on. I have originally done: su support While I was successfully able to switch to support, I found I was unable to make ...
2
votes
1answer
60 views

Does root not require a password to log in as a user?

Does root not require a password to log in as a user even though a password has been set for that user? When I am logged in as "root", su user logs me in as "user". There is no prompt for a password. ...
2
votes
1answer
255 views

su not asking for password

My su does not ask for password. When I run su it simply logs me in to root. I tried su - root then it asks for password. Now, because of this kdesu runs applications with root rights without ...
0
votes
2answers
288 views

Error when running X11 application as root

I get this wierd error when I run applications as root. **(gedit:630): WARNING **: could not open X display No protocol specified Unable to init server (gedit:630): Gtk-WARNING **: Cannot open ...
1
vote
2answers
111 views

Problem executing command as differetn user with sudo -u

I have the following problem When I'm trying to execute ls as user abc with the following command I get an error: xyz@host:~/temp$ sudo -u abc ls [sudo] password for xyz: Sorry, user xyz is not ...
2
votes
2answers
90 views

Making su ask for password multiple times

Is there some way to make su ask for the password again in case of a wrong password (just as sudo does)? Initially I thought of this: while ! su -c foo; do read -n 1 -p "Retry(y/n)?" ch if [[ ...
1
vote
1answer
31 views

How do I switch user without any references to the old one?

A while back, when playing with unprivileged LXC, I discovered that the command to create a container failed if I used su to switch to the user, but it worked if I used ssh user@localhost to login. ...
2
votes
3answers
172 views

Can sudo replace su?

There is much duplication of functionality on Linux-based systems, for example these do the same thing: sudo --login --user <user> sudo su - <user> The sudo-only approach looks more ...
0
votes
1answer
190 views

How do you keep the password hidden when invoked during the su command?

This is the first time it has happened to me where I am using the su command and it actually displays the password on the terminal and doesn't stay hidden. Here is my code snippet: sshpass -p ...
1
vote
1answer
2k views

Switch users with sudo or su in a shell script

I inherited this. Long story short I have an XML file that is calling a shell to run some commands. Everything I have tried has failed at the second su in the script. Here are some of the failure ...
2
votes
1answer
200 views

How to create an executable bash script for these commands?

I wish to create an executable bash script that will run the following commands as root, that is, using sudo su iptables-save | awk '/^[*]/ { print $1 } /^:[A-Z]+ [^-]/ { print ...
1
vote
3answers
1k views

Wrong Permission to /etc folder [duplicate]

I have given the wrong permission to the /etc folder chmod -R 777 /etc When I want to login as root it gives me an error and the following output. How can I correct the permissions? ...
1
vote
3answers
289 views

How to return from root log-in to my user log-in?

I'm using SuSE Linux Enterprise and I know that there is a command su root for changing to root log-in. But what about the other way around? If I prefer to return to my user account, how to do it? ...
1
vote
1answer
182 views

su to another user using ssh keys?

Assuming that user_A and user_B set up and exchange public ssh keys with each other, is it possible for user_A to su into user_B on the same machine?
0
votes
0answers
27 views

Help Parsing `su` Command … What Does the Hyphen Do? [duplicate]

In the command su - username, what is the function of the hyphen? It seems to work all the same without the hyphen.
2
votes
1answer
492 views

root login silently fails

After some months of not touching it I wanted to login to one of our virtual servers to update OpenSSL, because of the heartbleed thing. The server is running Debian 7, sudo is not installed. I ...
3
votes
2answers
603 views

Passing arguments to su-provided shell

man su says: You can use the -- argument to separate su options from the arguments supplied to the shell. man bash says: -- A -- signals the end of options and disables further option ...