Theres another way to switch to the root user: run the su - command: Now, whats the difference between su and su In case you have something to share about su or sudo, or want to share your own experience, you are welcome to do that in comments below. sudo stands for superuser do. It allows authorized users to execute command as an another user.Using su, we can switch to root user and execute command. But there are few drawbacks with this approach. We need to share root password with another user. How To Use Sudo And Su Commands In Linux: sudo allows a permitted user to execute a command as the superuser or another user, as specified in the e.g [user1server] sudo su - user2. I have modified the sshdconfig file, and uncomment the fieldsInstead, i want to switch from one user to another (without becoming root) with sudo su - user2, and avoid the password prompting. Sometimes, the user you have to be running these applications as is not the same as the your login user, this leads to errors like thissudo su - appuser. Su is not meant to do that -- sudo is. Open /etc/sudoers.d/custom and write the following: User-a ALL(user-b:user-b) NOPASSWD:ALL. Which means: whenever user-a executes sudo -u user-b (or any other variant), let him go without asking for password. Logging in as another user. root account.sudo -s (similar to sudo su). For a brief overview of some of the differences between su, su -, and sudo -i,s see : Ubuntu Forums Post with nice table . The sudo command allows you to run any command as another user and is commonly used to elevate permissions so that the command is run as an administrator (whichHow To Switch To Another User And Adopt Their Environment. The su command can be used to switch to any other users account. sudo allows a permitted user to execute a command as another user, according to specifications in the /etc/sudoers file.If a user runs a command such as "sudo su" or "sudo sh", subsequent commands run from that shell will not be logged, nor will sudos access control affect them. The sudo program allows a user to start a program with the credentials of another user.
6. Now use su - to switch to another user and notice the difference. Note that su - gets you into the home directory of Tania. I have this command before function: system("sudo su - user2") But now I dont know what I should write into sudoers file?.
program always ask me to write password when I program executes this system command. Running Commands as Another User via sudo Problem You want one user to run commands as another, without sharing Ive been trying to use ssh keys in order to be able to switch from one user to another user on the same Linux machine/server by using sudo su - username. You can also use the following to become the root user (if you have sudo access and authorization to execute the command): sudo -s It will then prompt you for yourThis next command is helpful if you want to run a series of commands as another user (after you are root, naturally): su username. According to the man page sudo -i leaves DISPLAY and TERM unchanged and sets HOME, MAIL, SHELL, USER, LOGNAME, and PATH, as well as the contents ofJust checked on another system withe the same 64 bit 10.04 LTS). mail is not even set when I use sudo -i (but is with sudo su sudo executes a command as another user but follows a set of rules about which users can execute which commands as which other users.Unlike su, sudo authenticates users against their own password rather than that of the target user. Execute a command as the superuser or another user, The real and effective uid and gid are set to match those of the target user, the group vector may beIf a user runs a command such as sudo su or sudo sh, subsequent commands run from that shell are not subject to sudos security policy. Look at the above snapshot, command "su -" has assumed root as the target. Running Program As Another User / sudo Command. The sudo command allows a user to start programs with the credentials of another user. That project user that we sudo su - projectuser into, has the permissions needed to access the projects directories.Personally, Id recommend playing around with cap shell first. Additionally, theres another option here, but I think the original link above provides a better chance of working. This is nothing to do with another physical user. Both IDs are mine. I know the password as I created the account.To get it nearer to the behaviour su - user2 instead of su user2, the commands should probably all involve sudo -u user2 -i, in order to simulate an initial login as user2 Gert van den Berg Feb 22, 2015 Allowing other users to run sudo. To add a new user to sudo, Logging in as another user.I would like to run a script from the main ubuntu shell as a different user that has no password. I have full sudo privileges, so I tried this: sudo su -c "Your From the blog, heres the procedure. sudo su - someuser. script /dev/null. screen.(enter screen command mode) CTRL-a : (grant access to users) addacl root. The user to grant here is root if you use sudo, but you can give any unprivileged user provided you add screen setuid. Understanding SU Installing and Cнаfiguring SUDO on Websetnet | Who is the Superuser ( SU)?SUDO. This is a Linux package that runs a command as another user per command and returns back to the currently logged in account. The sudo -u -i command is what you need to run if you want to simulate precisely the initial logged in state of another user.I could sudo su to the user I wanted to be, and no password was required. Q) When I run sudo it says I am not allowed to run the command as root but I dont want to run it as root, I want to run it as another user. My sudoers file entry looks like: bob ALL(oracle) ALL A) The default user sudo tries to run things as is The su commandcan also be used to run an individual command as another user. This was seen in the startup script for oracle in the last chapter.sudo, a More Secure Alternative to su. If you are using only su you will have to know the target users password to have access. Using sudo without parameters implies that you want to use root. If you want to execute the command as another user, try sudo -u . You can use sudo with su to login as another user without requiring a password.Be warned that the ALLNOPASSWD part allows fromuser to run /bin/su - to user on any host that uses the sudoers file without requiring a password. Using sudo is one of those good ways. Whenever a user tries to install, remove and change any piece of software, the user has to have the root privileges to perform suchThe Linux command su is used to switch from one account to another. User will be prompted for the password of the user switching to. task :sudotest do sudo "su - svcuser" run "whoami" end. I get prompted for my password, but then I get the shell prompt of the svcusers shell as output and everything hangs.I think what you want might run "sudo -u svcuser whoami" This will run the command whoami as the user svcuser. sudo su - user2. 4. Set DISPLAY env to the same as user1s.I dont need this if I just log into another machine with ssh -X, but if I then sudo su to work as root, I cant find the right incantation to make xauth allow me to run X programs from the su job. The su command (as used by IBM UrbanCode Deploy) enables a user to start a shell as another user (process steps can be considered individual shells).su and sudo maintain a record in the system logs of all of their activity. su can be used without configuring the sudoers file. While sudo runs a single command with root privileges, su launches another shell instance with the privileges of the intended user. Both, sudo and su, are use to grant root privileges to the users in different manners. Dont sudo su - user, use sudo -iu user instead. (Easier to manage through sudoers, by the way.) grawity Feb 9 11 at 12:07.If you want to run another command from within the script as this other user, you should use something like Update the users cached credentials, authenticating the user if necessary. For the sudoers plugin, this extends the sudo timeout for another 5 minutes by defaultIf a user runs a command such as sudo su or sudo sh, subsequent commands run from that shell are not subject to sudo s security policy. ssh -X rootremotehost su - [username] export DISPLAYx.x.x.x:y.y xclock Error: Cant open display: x.x.x.x:y.y.3. Switch to another user account using sudo. Add the cookie from the command output above to the sudo user. Our old documentation states: sudo su - From what I can tell reading sudo allows one user to run commands with the permissions of another user, root or otherwise? OS X launches the bash command as another user with sudo privileges.Executing the command as another user on Linux with su - user c creates a duplicate process. I want to run a process by a service as root user, because the daemon may have its own user. The su command stands for "substitute user", and allows you to become different user(super user). sudo su changes the current user to root but environment settings (PATH) would remain same. It allows user who have permissions to execute a command as the superuser or another user sudo allows a permitted user to execute a command as the superuser or another user, as specified by the security policy.Please note that sudo will normally only log the command it explicitly runs. If a user runs a command such as sudo su or sudo sh, subsequent commands run from that shell are sudo allows a system administrator to delegate authority to give certain users—or groups of users—the ability to run commands as root or another user while providing an audit trail of the commands and their arguments. Sudo is an alternative to su for running commands as root. Unfortunately when you su to another user (or even use sudo) youll lose the ability to use your forwarded keys. This is a security feature: You dont want random users connecting to your ssh-agent and using your keys sudo (superuser do) allows a user with proper permissions to execute a command as another user, such as the superuser, or root user. The Root User. Both su and sudo are used to run commands with root permissions. ihlinux : sudo apt-get update.
su command. This cmmand standrs for switch user. su command helps us to switch current user to another. Just type the user-name after the su command, it will ask for the password (target users password). Becoming root is only a part of it. su or sudo IS ABOUT becoming another user. It could be johnny, mary, smeagol, klingklang, and lastly root. A successful su means you need to enter the password of the user you are about to switch to. For the reasons above, switching to root using sudo -i (or sudo su) is usually deprecated because it cancels the above features.A user which already has sudo can create another user (example idfoo) with sudo group membership from the commandline If a normal user needs to perform any system wide changes he needs to use either su or sudo command.adduser bob sudo. Thats all for now. Ill be here again with another Interesting article. Till then stay tuned and connected to Tecmint. Running Commands as Another User via sudo Problem You want one user to run commands as another, without sharing passwords. su (which means "substitute user" or "switch user") - does exactly that, it starts another shell instance with privileges of the target user. The Unix commands sudo and su allow access to other commands as a different user.The su command stands for "switch user", and allows you to become another user. To use the su command on a per-command basis, enter Ive been asked to allow suing to another user without the original user having the password of the account to which theyre suing. The obvious way to do this is by using sudo and putting an entry like this into the sudoers file sudo -i -u user whoami. Example (print users HOME)That sudo syntax threw an error on my machine. (su uses the -c option, but I dont think sudo does.)