12.04command linesudo
I have an executable file but don't know what type or format it is. When I execute like this
$chmod +x xfile
$./xfile
It shows
Permission denied
when I run as super user
$sudo ./xfile
It shows
sudo: ./xfile: command not found
I am new to Linux please tell me how to execute it.
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
You should boot from a LiveCD then do the following:
cd into the /usr/bin folder of that installation you mounted from above.Run this command to give all users execute permissions
sudo chmod -R a+x .
Run this command to give all users read permissions
sudo chmod -R a+r .
Run this command to remove all users (except root's) write permissions
sudo chmod -R o-w .
Best Answer
Strange, it works exactly that way over here.
First, try to find out what the file is:
The file command looks inside the file and based on certain "magic" tries to figure out what that program does.
From what you describe I guess that it is a shell executable that tries to execute yet another program. If this is the case, why don't you post the code of the shell executable using http://paste.ubuntu.com.