Ubuntu – Running a startup program in terminal with sudo

lubunturootstartup

I need to run a python script in a terminal, myscript.py at startup (on Lubunt). This script requires root.

I've set up a .desktop file that runs the following command:

lxterminal --command="python /home/d/Jarvis/alarm.py && /bin/bash"

The terminal window opens at startup and runs the script, but then closes when the Python script returns an error (because it's not being run as root). When I change the Exec= to this…

lxterminal --command="sudo python /home/d/Jarvis/alarm.py && /bin/bash"

… (prefixing command with sudo) which works. However, the terminal opens on startup and displays the

[sudo] password for d: \

prompt, requiring me to input my password. I would like the execution of the python script at startup to be completely automatic with no user interaction.

How can I accomplish this?

Best Answer

If you want it at login and not startup (as I don't see how LXTerminal can be opened without X server being up), you have to add an exception to the /etc/sudoers file so that you won't be prompted for your password.

To do this, run sudo visudo and then add the following:

<your username> ALL = NOPASSWD: /home/d/Jarvis/alarm.py

Make sure that you add this at the end of the file for this to work. I would also set the permissions of alarm.py to executable for this to work. So, do this to set it as executable:

chmod +x /home/d/Jarvis/alarm.py

Hope it helps!

First Question

If you dont want to enter password everytime,then you should edit sudoers file.

sudo visudo
Then add the following line at the end of the file.

%username ALL=(ALL) NOPASSWD:ALL
Now if you enter sudo followed by the command it wont prompt you to enter password.

Second Question

For your second question you can add that command sudo vpnc to startup applications.
To add that command in startup applications Goto System → Preferences → Startup Applications.

Ubuntu – Execute sudo without Password

You can configure sudo to never ask for your password.

Open a Terminal window and type:

sudo visudo

In the bottom of the file, add the following line:

$USER ALL=(ALL) NOPASSWD: ALL

Where $USER is your username on your system. Save and close the sudoers file (if you haven't changed your default terminal editor (you'll know if you have), press Ctl + x to exit nano and it'll prompt you to save).

As of Ubuntu 19.04, the file should now look something like

#
# This file MUST be edited with the 'visudo' command as root.
#
# Please consider adding local content in /etc/sudoers.d/ instead of
# directly modifying this file.
#
# See the man page for details on how to write a sudoers file.
#
Defaults    env_reset
Defaults    mail_badpass
Defaults    secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin"

# Host alias specification

# User alias specification

# Cmnd alias specification

# User privilege specification
root    ALL=(ALL:ALL) ALL

# Members of the admin group may gain root privileges
%admin ALL=(ALL) ALL

# Allow members of group sudo to execute any command
%sudo   ALL=(ALL:ALL) ALL

# See sudoers(5) for more information on "#include" directives:

#includedir /etc/sudoers.d

YOUR_USERNAME_HERE ALL=(ALL) NOPASSWD: ALL

After this you can type sudo <whatever you want> in a Terminal window without being prompted for the password.

This only applies, to using the sudo command in the terminal. You'll still be prompted for your password if you (for example) try to install a package from the software center

gui password prompt

Best Answer

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Ubuntu – Execute sudo without Password

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