By default, Linux restricts access to certain parts of the system preventing sensitive files from being compromised. In the terminal window, type vim ListDir.sh and hit enter. The best answers are voted up and rise to the top. please enter yes or no: no, You dont use sudo in a script, just run the script itself with correct permissons. Use 'sudo', not 'sudo su'. Best practices on using sudo in a bash script, Voltage drop across opposite diodes in series. In order to complete the entire bash script uninterrupted, I'm asking for the user password at the start for sudo, but I notice sudo understandably keeps the password session for something like 15 minutes only. And dropping 'sudo su' in the middle of your script as you are doing doesn't work -- assuming you were trying to get the rest of the script to run with root authority or other-user authority. In fact, Sudo stands for “Super User Do,” and it logs all arguments. I am trying to execute a very basic bash script to retrieve logging from multiple machines. Also, this answer is not what OP wants, but what it needs. Why is my neutral wire connected to a breaker? Ask Ubuntu is a question and answer site for Ubuntu users and developers. Typically as a root user or another user. Also giving an error and forcing you to retype/rerun (with sudo) is less friendly. This script will do nothing except it will print process ID of the sudo_test.sh bash script along with its relevant owner id as a STDOUT output and in the same time it will create a file called sudo_file.tmp within /tmp/ directory. How to bypass sudo password for everything inside a script? If the result is ‘0’ then the script is either running as root, or using sudo. To learn more, see our tips on writing great answers. Now we execute this script as … The good news: you can install the sudo command on Debian and give your user the “sudo” permissions. However, sudo only recognizes and runs commands that exist in directories specified in the secure_path in the /etc/sudoers, unless a command is present in the secure_path, you’ll counter an … A general solution to these issues is to put the following preamble at the top of your sudo requiring scripts: Obviously, this has a downside in that if some commands in the script don't require sudo to run, there's an unnecessary elevation of privileges here. Require no sudo password for executing this command; the password prompt for mount remains. ...but it requires the users to type the same password twice! I'm a newbie to Linux and any help would be appreciated. One password instead of two. absolutely ensure you are invoking ./gitpull.sh from bash and not another shell such as tcsh, pdksh or plain old sh.I'm pretty sure the script's hashbang line should allow the script to specify what shell to run it under but maybe it was omitted for some reason or the instruction writer doesn't want you to rely on that. Conclusion. Therefore, to run a shell script or program as root, you need to use sudo command. Usually, to grant sudo access to a user you need to add the user to the sudo group defined in the sudoers file.On Debian, Ubuntu and their derivatives, members of the group sudo are … Use 'sudo', not 'sudo su'. Understanding sudo command options. The /etc/sudoers file could be used to just make sudo not require a password. by adding a script such as @Braiam proposes and allow running that through sudo without extra authentication. Sudo stands for SuperUser DO and is used to access restricted files and operations. Simple answer -- don't do that. Simply use the sudo or su command as follows: sudo bash filename.sh Type your password. Sudo: No password for certain command for everybody (including domain users), Proper way to let user enter password for a bash script using only the GUI (with the terminal hidden), Sudoers file, enable NOPASSWD for user, all commands, Bash login script with zenity for CIFS mount. First, we need to create a new file using any text editor, like nano, vim, gedit, or any other. The nicest thing about it, is that if you're already effective-uid root (e.g. If it's intended to be run by an admin user with sudo privileges, just add sudo -u $c_uname in front of the commands that need the permission change, or just use sudo to run the whole script. I'm trying to write a simple script that checks for available home directory size and ask the user whether to delete their VNC log files or not, but only after I type exit the rest of the script runs and I get permission denied. Is there a link between democracy and economic prosperity? Success! By clicking “Accept all cookies”, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The sudo command takes as an argument the command or script to execute. Thanks for contributing an answer to Ask Ubuntu! After several hours the script stops waiting for the user to enter the sudo password again. Asking for help, clarification, or responding to other answers. But your solution might work for others, so upvoted... (and original comments removed). just check if the script is being run as root, if not ask for it. Once inside the Editor, type "I" or "i". I thought my explaination of sudo was pretty clear if you wanted to use sudo without it requesting a password (using the -S or -A) options. To run multiple commands sudo we used the following options:--: A --signals the end of options and disables further option processing for sudo command.sh -c : Run sh shell with given commands ; bash -c : Same as above. That wouldn't affect whether mount asks for a password. This developer built a…, Policy Change Proposal: “End of Standard Support” for ESM releases is…, Enter password only once for script making many sudo calls, Bash Automation without asking for password. If it's intended to be run by root, you still don't need to switch users to delete files. Why is bleaching with Chlorine permanent but with Sulphur Dioxide temporary? 1 question: does that echo the command into the process list? You may also want to check out the timestamp_timeout variable in man 5 sudoers which tells sudo to remember user credentials for a limited number of minutes (and can be fractional). This works for direct subshells, but apparently sudo doesn't forward functions (only variables). you could create a group cifsmount and then have. Notice that with sudo , it requests for the current user’s password instead of the target user . Press question mark to learn the rest of the keyboard shortcuts. I am running the script locally but need to access an external machine via ssh, as well as sudo into a privileged user once on that machine... ssh myuser@machine.net sudo su - privledged_user cat logs > file.txt if you already called it under sudo) it gracefully does the right thing. Why no relative pronoun in ἄνθρωπος ἐξηραμμένην ἔχων τὴν χεῖρα? Also, the Sudo command is mostly used when trying to install, launch and exit an application that requires root user privilege.