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Do you need sudo command to run shell?
On most if not all Linux systems, the security policy is driven by the /etc/sudoers file. Therefore, to run a shell script or program as root, you need to use sudo command.
Can a superuser run a sudo command as root?
sudo is a powerful command line tool that enables a “permitted user” to run a command as another user (the superuser by default), as defined by a security policy. On most if not all Linux systems, the security policy is driven by the /etc/sudoers file. Therefore, to run a shell script or program as root, you need to use sudo command.
Is it safe to run a Sudo script?
For security reason, do check out the following article from the sudo website explains a vulnerability relating to secure_path: https://www.sudo.ws/sudo/alerts/secure_path.html Preferably, we can provide the absolute path to a script while running it with sudo: That’s It!
How to add Sudo scripts to secure path?
To fix this, we need to add the directory containing our scripts in the sudo secure_path by using the visudo command by editing /etc/sudoers file as follows. Attention: This method has serious security implications especially on servers running on the Internet.
Do you need password to run Sudo script?
In the first way I may need to provide my password multiple times for different sudo commands, while the superuser privileges are granted only to those commands which need them. From security concern, the first way is better.
Can a script be run without Sudo privileges?
That way, all commands within the script will be run with root privileges and you only need to give the password once when launching the script. If you need a particular command within the script to be run without sudo privileges, you can run it as a regular user with (thanks Lie Ryan ):
Which is an example of Sudo in Linux?
Examples of sudo in Linux Basic Sudo Usage. 1. Open a terminal window, and try the following command: apt-get update. 2. You should see an error message. You do not have the necessary permissions to run the command.
Can a privileged user run a Sudo script?
Because the shell process is running in privileged mode, all those commands will be executed in privileged mode. Of course, using sudo by a privileged user has no side effect. Sometimes even typing the password once is not convenient. There are several solutions to allow running a script without password.
How to find the root user of a Sudo script?
However, in case you want to drop root privileges to some of the commands and run them as the actual user who invoked the command with sudo, you can check for the $SUDO_USER variable to figure out the original user. #!/bin/bash # ref: https://askubuntu.com/a/30157/8698 if ! [ $ (id -u) = 0 ]; then echo “The script need to be run as root.”
Can you run a script with or without Sudo?
Would this simple approach have the best of of both approach: add sudo to commands which only need it, and run the script with or without sudo depending on whether I want convenience or security? Does this approach have some problem? Thanks. To address your first issue:
Is there way to fix Sudo bash script?
In this case it would fail though since there’s a redirection on the first line that needs root privileges, so you “fix it” by using sudo bash -c ” > ” instead, turning the nice and readable script into a mess of confusion (again, just a personal opinion).