Pros of using sudo:. From the man page: The su command is … Files exist in file systems only. Moreover, commands like “sudo su -”, “sudo -i”, and “sudo -S” can make ‘sudo users’ become ‘root’. If you are a newbie, it is advisable to keep your hands off “su” and use “sudo” if required. In this article, we will discuss in detail the ‘su’ command as well as how it differs from the ‘sudo’ command. What is ‘su’ command? See su vs sudo -s vs sudo -i vs sudo bash for a more general discussion. Normally, you shouldn't even be … sudo su means run the command su as sudo which means as root. Craig Ringer Craig Ringer. The main work of the su command is to let you switch to some other user during a login session. $ sudo pip install Installs the package globally in your python installation, i.e. Today, I had to do it again. Save my name, email, and website in this browser for the next time I comment. Thanks. Watch the full course at https://www.udacity.com/course/ud299 Registered User. In this article, we will discuss in detail the ‘su’ command as well as how it differs from the ‘sudo’ command. If you go to the extention.js and search the running command (it is an array of functions with string output, joined by one empy space), you will find it named l. Just add to the list of the command "-t sudo su" And it works like charm. NOTE – This article is more applicable to Ubuntu based distributions, but also applicable to most of the popular Linux distributions. Sponsored by: Posted in: … Both sudo -i and sudo su - will get you an interactive login shell. When adding the ‘-‘ character to the end of this command, you are also put into the PATH of the superuser. One way to enforce this is the free, open source solution called sudo (superuser do). Forget sudo su There is no benefit to using sudo su, it's an anachronistic habit from when people were used to using su. su VS sudo su VS sudo -u -i. One needs to assign a password to the root account to log in as root. This allows Unix users to access and authenticate to a system with a personal account and escalate privileges to superuser or root to run privileged commands. Your PS1 is different from root's PS1. The root user in a Linux system has the maximum permissions and he/she can do anything to the systems. $ pip install --user Installs to the local user directory, i.e. But why on a less than prehisoric UNIX or Linux would you use sudo su? Distribution: Debian 10 (Buster) x64 . I recently installed Debian in VirtualBox. "-t sudo su" And it works like charm. Quite clearly, 'sudo' is a better alternative between the two as far as security is concerned. Disabling the Direct Root Access Since sudo users can run administrative commands without logging in as an administrator, it is suggested to disable the root access. Files exist in file systems only. Sudo uses a config file (/etc/sudoers) to define the rights of different users. 2. ; Non-obvious system administrators-- A user account called john can be given admin privileges, and nobody would be the wiser just by looking at it. Read more at HowtoForge. ‘su’ Vs ‘sudo’ ‘ su ‘ forces you to share your root password to other users whereas ‘ sudo ‘ makes it possible to execute system commands without root password. Isn't sudo -i username equivalent? The hyphen " - " is an option to the "su" command, ie it is not an option to sudo. switch user and do this command. 05-04-2016, 03:44 PM #19: linustalman. You’ll have to enter the root account’s password. The su command substitutes the current user in use by the system in the shell. During install there's a section where you can make a password for the root account but if you leave it blank, it instead gives your regular user sudo ability. A much more common way to get privileges is e.g. Registered: … Posts: 4,299 Original … Before telling you the difference, let me tell you the meaning of a root user. If you have ever dabbled with the command line in Linux (who don’t? and. i know su - will try to switch to root user. sudo su vs. sudo su – Chris Klosowski on June 29, 2011. SU vs SUDO. Here the system will ask you for your password since you are a sudoer. Rather than change their habits, they just used sudo su. All donations are processed sacurely via PayPal and are very much appreciated. Registered: Mar 2010. Brian Ewell. Now the question is, how can you run sudo. In the terminal, su also lets you access any other user account using the required password. Watch the full course at https://www.udacity.com/course/ud299 Share. On the other hand, sudo runs a single command with root permissions. … This means that login … sudo should be read as /ˈsuːduː/. `sudo su` changes the values of USER, HOME, and SHELL to that of the root user. su is unnecessary; sudo -s is equivalent to sudo su, but allows the admin to restrict who may sudo to whom, for which programs, and so on. Creative Commons Attribution-ShareAlike 4.0 International License. First, sudo asks for your password, and, if it’s provided, it runs the next command as a root user. SternGerlachExperiment Member Registered: 2009-10-11 … The difference you are seeing is because of the way that sudo is configured to handle environment variables and in this case PS1. Add a comment | 1. And the hyphen is shorthand to "su" for the "-l" option, and " -l " is the short form of "--login". sudo -u user1 fails because you’ve told sudo to do something as user1, but you haven’t told it what; you need to specify a command to run, or -s to start a shell. If you look in /etc/sudoers you will probably find an env_keep line that contains PS1. `sudo -s` only changes USER (it seems), but HOME is retained as the SUDO_USER's home directory. In the Linux and UNIX environments, you need to use either SU or SUDO in order to gain momentary access to another account, usually the root, while logged on as another. The ‑i (simulate initial login) option runs the shell specified by the password database entry of the target user as a login shell. 9,473 8 8 gold badges 32 32 silver badges 57 57 … ‘sudo’ is a … Improve this … sudo versions prior to 1.8.28 A sudo rule allowing access to run commands as ALL users (the (ALL, !root) declaration) You can disable access to run something as root and using a UID of -1 or 4294967295 will get around the !root restriction. what may have happened? Fossbytes co-founder and an aspiring entrepreneur who keeps a close eye on open source, tech giants, and security. Location: Ireland. Important: One should also note that these functions are used in a different way in different Linux-based operating systems. Because sudo runs the su - command with root permissions, you will only be prompted for the user's password. Posts: 1,713 Thanks … Follow answered May 15 '20 at 18:57. Apart from letting a normal user install/delete some package, root user permissions also act as an extra security layer. To help keeping this manual advertisement free, you can donate a small amount towards webhosting and site maintenance. Most of the commands I run are executed as a different non-root user - e.g. SU stands for substitute user and SUDO means substitute DO; although most people incorrectly think that it stands for super user as it is the account that is often used. Additionally, it is advisable to stick to sudo when performing tasks that require root privileges. This post was partially inspired by half an hour of unsuccessful googling in trying to figure out how I should be getting into a shell as another user with no password required. Join Date: Feb 2010. The su command stands for super user or root user. People started tacking sudo in front when Linux distros stopped setting a root password and made sudo the only way to access the root account. "appadmin". "su" is the command you are allowed to run via "sudo". Your email address will not be published. So before you make the call, make sure you’ve weighed the pros and cons and explored other alternatives that can deliver a higher level of security, scalability and reliability. I had exactly the same problem and the only exact answer I found is with: SSH FS vscode extension . Also, sudo doesn’t activate the root shell and runs a single command. 4. You can switch to any user by taking su and adding a username by it. Sudo vs. Su # On some Linux distributions like Ubuntu, the root user account is disabled by default for security reasons. One password to rule them all-- A user must only remember one password: their own.This makes administrative tasks a lot simpler, and much more convenient. ‘su’ Vs â’sudo’ While using ‘su’ you have to share root user’s password with other users whereas ‘sudo’ make it possible to execute system-level commands without even providing root password. Therefore, it is much safer to use sudo since it doesn’t include exchanging sensitive information. This video is part of the Udacity course "Configuring Linux Web Servers". sudo su vs. sudo su –. If you look in /etc/sudoers you will … After you enter your password, you now have root privileges. ), you are sure to come across the command “sudo” and “su”. I'm not a sudoer on any box i administrate, and i've apt-get … In other words, the tool lets you assume the identity of some other user without having to logout and then login (as that user). Your PS1 is different from root's PS1. This means that no password is set for root, and you cannot use su to switch to root. One password to rule them all-- A user must only remember one password: their own.This makes administrative tasks a lot simpler, and much more convenient. As described earlier, if su runs as root, you will not need to enter the target user’s password. 1,713, 295. This has the advantage of setting up the root user's environment, which may not be done by simply running a shell with sudo. Follow answered May 2 '13 at 1:15. It allows user who have permissions to execute a command as the superuser or another user, as specified in the sudoers file. AFAIK the default sudo configuration as installed with openSUSE results in the same allowances as su -. Share. In the Linux and UNIX environments, you need to use either SU or SUDO in order to gain momentary access to another account, usually the root, while logged on as another. Clearly, this can be done by directly starting a session as a given user, or even logging in again through localhost, but this approach tends … 1. Linux – su vs sudo. Originally Posted by C-Sniper unless I have to open a gui from console, then I su vs. sudo - Page 3 thanks. sudo prompts users for the originating user's credentials while su prompts users for the credentials of the user being switched to. Your working directory will be /root, and it will read root's .profile etc. But if you use sudo su - user command, there are no questions asked as you are launching a new shell process with the settings of the referenced user on its own. The sudo configuration is intended to be distributed to all systems for convenience. sudo su - username will do the same, but first ask the system to be elevated to super user mode, after which su will not ask for "username"'s password because a super user is allowed to change into any other user without knowing their password. Disabling the Direct Root Access. Did you find this article helpful? It works! Ubuntu and some other distros allow sudo by default. Add a comment | 6. su -: This will change your user identifier and inherit the environment variables as if you had logged in with that user. I’ve always wondered this but finally got the answer as to why you should use: $ sudo su -. sudo and su (and many other programs including mount) need this feature to work; some programs work partly without this feature (like mount), others (like sudo and su) do not work at all.This feature is related to files. Built with Grav - The Modern Flat File CMS, Installing Debian mappu on Mar 24, 2012. I’ve always wondered this but finally got the answer as to why you should use: $ sudo su-instead of using: $ sudo su. Get in touch with him by sending an email —. Su vs Sudo. Invoked without a … adding … su on the other hand, will switch the current user to root (again without any extra commands). George T George T. 41 1 1 silver badge 7 7 bronze badges. i have seen people executing pbrun sudo su - what this means?? Moreover, commands like “sudo su -”, “sudo -i”, and “sudo -S” can make ‘sudo users’ become ‘root’. They might differ a little bit in other Linux distributions. This isn’t all the su command does, though – you can use it to switch to any user account. For as long as there have been multi-user operating systems, there has been the need to switch between those users. There's sudo, if improperly configured, it is a security nightmare, but if done properly, which is very easy, it can maintain a secure system while allowing flexibility in day to day operations. MelBurslan MelBurslan. Both sudo -i and sudo su - will get you an interactive login shell. Senior Member . Not sure if you'll get the same results with Ubuntu. For over 6 years of using Linux, I have not come across an instance where I need to use “su” or “sudo -i”. Short Bytes: Many of you might be using sudo and su in terminal every day to accomplish different tasks. In the example below, I have to run sudo su, since I don't know the root password for my system: % whoami alake % sudo su $ whoami root The key difference between sudo and su is sudo runs a command as root, whereas su makes you root. for all users. I did this yesterday and was able to add a mnt point for my esata drive. Senior Member . 04-27-2016, 03:39 PM #2: AlucardZero. It is worth noting, that hacking rarely happens through password cracking, or brute force attacks. Since sudo users can run administrative commands without logging in as an administrator, it is suggested to disable the root access. tip: after edit close ssh window and open again. Is PUBG: New State Coming to India? sudo -su user1 runs a shell as user1. Written by Guillermo Garron Date: 2019-06-08 20:40:00 00:00. But in that case, I do not see any advantage in using the fat sudo over the tiny su - (and no surprises in case the sudo configuration is a bit different from what you assumed it is). The prompt will change from $ to #, indicating you have root access. Last Activity: 26 April 2017, 8:59 AM EDT. When any superuser type su, it will prompt to enter the root password of the server. Follow asked Mar 10 '14 at 11:10. rupert160 rupert160. This way, Ubuntu encourages a user to avoid logging in as a root user. They are both tools that exist to solve certain kinds of problems, and they solve different problems well. su vs sudo on SmartOS. – Aaron D Feb 26 '13 at 2:19. 1.Anyway why does su not work when sudo does? For the most Linux distributions, su and sudo are widely used commands. Pros of using sudo:. Alternatively, the su command can gain root access by entering su without specifying anything after the command.“su” is best used when a user wants direct access to the root account on the system. sudo and su (and many other programs including mount) need this feature to work; some programs work partly without this feature (like mount), others (like sudo and su) do not work at all.This feature is related to files. This video is part of the Udacity course "Configuring Linux Web Servers". That being said, sudo in itself enforces security by by checking the /etc/sudoers file to make sure the current user is allowed to gain super user permissions,and possibly … This command requires you to use sudo, which means that the su command will be running as root. When a user runs a command with sudo, e.g., sudo command, he/she needs to enter the current user account password to run it as root user. syntax sudo command i.e. Simply type su followed by the user account name, e.g., sudo fossbytes, and you’ll enter the password for fossbytes. Previous Article. guns on Mar 24, 2012 They are not equivalent. Sudo vs Su [Linux] (MTE Explains) By Damien / Apr 24, 2012 / Linux. In distros like Fedora, a person needs to create different passwords for root and user accounts. 1,141 1 1 gold badge 13 13 silver badges 18 18 bronze badges. When adding the ‘-‘ character to the end of this command, you are also put into the PATH of the superuser. Su vs Sudo. Last edited by myxolam (2009-10-16 11:27:15) Offline #2 2009-10-14 19:00:33. sudo -u postgres psql Without the leading sudo the su versions would make some sense if you were on an old platform without sudo. One option to change to root would be to prepend the su command with sudo and enter the currently logged in user password: Improve this answer. Required fields are marked *. 3. ‘sudo ‘ lets you use your own password to execute system commands i.e., delegates system responsibility without root password. social engineering, where users are tricked into giving up their passwords, or plain and simple surveillance, key-logging, etc. For basic users, using “sudo” for most root commands suffice. Post-installation tasks Linux – su vs sudo. Also Read: Linux Lexicon — Anatomy Of A Man Page, Your email address will not be published. Why Not A Or B? SU vs SUDO. I become these users via "sudo su - appadmin", since I don't have the passwords for this user either. sudo su -c 'env' hdfs | sort >sudo_su.txt sudo -u hdfs 'env' | sort >sudo.txt diff sudo.txt sudo_su.txt 11a12 > PWD=/home/user 14c15,16 SHLVL=1 > SUDO_COMMAND=/bin/su -c env hdfs 20a23 > _=/usr/bin/env hadoop sudo su. postgresql shell sudo su. What is ‘sudo’ command? Overall, su basically starts another shell instance with the privileges of the intended user. Improve this answer. The user just needs to add root account password. ~/.local/lib/python -- just you. Follow asked Jun 2 '14 at 8:07. The mount point had disappeared. If you execute the su bobcommand, you’ll be prompted to enter Bob’s password and the shell will switch to Bob’s user account. I'll show this second example. While sudo runs a single command with root privileges, su launches another shell instance with the privileges of the intended user. Comparing the both, sudo lets one use the user account password to run system command. Location: istanbul. So when does one use su vs sudo? The former stays in the current working directory from which "sudo su" was run. Linux: su v/s sudo. SU stands for substitute user and SUDO means substitute DO; although most people incorrectly think that it stands for super user as it is the account that is often used. Despite what Hollywood would have us believe, the most effective tool a hacker can use is psychology. ; … In other words, the tool lets you assume the identity of some other user without having to logout and then login (as that user). Linux: su v/s sudo. After completing the job, you can exit the root shell by typing exit. 30 Jul 2016 • 3 min read. In this article, we will explain in … The main difference between the two is that su requires the password of the target account, while sudo requires the password of the current user. At least one thing is different between "sudo su" and "sudo su -" The latter changes to root's home directory. https://www.tecmint.com/su-vs-sudo-and-how-to-configure-sudo-in-linux Sudo can be configured to blacklist or whitelist specific commands for each user. sudo su - postgres -c psql instead of. sudo su will execute commands as root in your present working directory but sudo -i will take you to your root's home directory (by default to /root) Another difference is if you are using anything other than bash as your shell sudo -i and sudo su will take you to the shell configured for the root user (bash is default in Ubuntu) while sudo -s uses the shell you configured for your user(e.g, zsh) share | improve this answer … Different variations I've tried either complain "sudo: a password is required" or time out after 12 seconds. While sudo runs a single command with root privileges, su launches another shell instance with the privileges of the intended user. sudo su - takes me to the homefolder of the user and allows me to switch without remembering the password for all of the different users. ‘su’ Vs ‘sudo’ ‘su‘ forces you to share your root password to other users whereas ‘sudo‘ makes it possible to execute system commands without root password.‘sudo‘ lets you use your own password to execute system commands i.e., delegates system … This means that no password is set for root, and you cannot use su to switch to root. No dedicated root account-- As discussed above, this can be a lot safer. ‘su’ commands forces you to share your root password to other users. The difference you are seeing is because of the way that sudo is configured to handle environment variables and in this case PS1. When you just run the command su, you are running it as a regular … – Jhon Didier Sotto Jul 15 '20 at 3:49. There’s an often-used combination sudo su that Linux users find helpful.
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