Can a sudo command be run inside a script?

Can a sudo command be run inside a script?

It is rarely a good idea to have sudo inside scripts. Instead, remove the sudo from the script and run the script itself with sudo: 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.

How long does it take Sudo to CACH a script?

The default caching time is 15 minutes. If you want to run a script longer than that and still keep the privilege without typing password again, you don’t need to worry about anything: simply run the script with sudo. In this case, whether each command inside the script contains sudo doesn’t matter.

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.”

What does Sudo do to the current shell?

What sudo does is create a new *sub*process that runs as root. The subprocess could be just a regular program (e.g. sudo cp runs the cp program in a root process) or it could be a root subshell, but it cannot be the current shell.

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.

How to use sudo without password in script stack?

As mentioned by Basilevs you need to add your user to the sudoers file in order to avoid that sudo commands in the script get stuck awaiting the password. On Ubuntu 16, there is a simpler way: just add the user to the sudo group, like this: sudo usermod -aG sudo *username* From then on, it should work like a charm.

How to run bash scripts from personal bin?

To apply the changes immediately to our bash profile without having to log out, we can run the following command: Done. Now we can run a command-line applications or our own scripts from our personal bin directory that located in our user’s directory. Let’s now try to test our new bin directory.

How to get$ home directory of different user in bash script?

The working directory for the impersonating shell is the someUser ‘s home directory. Unless you also specify -H, the impersonating process will report the original user’s home directory in $HOME. The impersonating shell will have the same working directory as the invoking process.

How to continue a script after it reboots the machine?

My specific version is Ubuntu Linux 14.04. The original script is started on the command line by a system administrator (as opposed to running from cron). On a system, the only thing that is really persistent is a file. That’s pretty much what you should use.

How to execute commands and scripts at startup?

This method is the easiest method of the two methods. We will create a cron job that will wait for 90 seconds after system startup & then will execute the command or script on the system. where /location/script.sh is the location of script to be executed.

Can you run a script in Git Bash?

When those were fixed, the script ran fine with ./script.sh. If by any chance you’ve changed the default open for .sh files to a text editor like I had, you can just “bash .\\yourscript.sh”, provided you have git bash installed and in path.

Why does Sudo Sudo fail in Windows 10?

It gets “permission denied” error. For the ways to fix this see @shantanu answer. (*) – while the above sequence helps to understand why the command fails, in reality things happen somewhat out-of-order: the original shell notices the redirection and tries to open the file for writing before invoking the sudo command.

When to use sudo before or after restricted command?

To make it work, use sudo before a restricted command. The system will prompt for your password. Once provided, the system runs the command. To start using sudo, use the following syntax: When the sudo command is used, a timestamp is entered in the system logs.

What does Sudo-B./ B _ script do?

It will run sudo -b ./B_script . This asks for the password ( immediately after you run ABC_script ). Assuming that the correct password is entered, it spawns B_script in the b ackground (because -b was specified) as root. This seems to be equivalent to sudo sh -c “./B_script &”. B_script starts running asynchronously, in parallel with ABC_script .

Is it stupid to run no op Sudo?

First it seems stupid to run a no-op sudo first, and also I must cross my finger that A is not going to take more than $sudo_timeout. That would prompt for my password at the beginning, and then use that credentials only when needed. What’s your opinion on all this?

How to run Sudo script without root password?

You can set the s bit for your script so that it does not need sudo and runs as root (and you do not need to write your root password in the script): One option is to use the -A flag to sudo. This runs a program to ask for the password. Rather than ask, you could have a script that just spits out the password so the program can continue.

Is there a way to ask for password in Sudo?

One option is to use the -A flag to sudo. This runs a program to ask for the password. Rather than ask, you could have a script that just spits out the password so the program can continue.