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I have some bash scripts which I manually run a lot and they need to run with sudo. I also don’t want to be prompted for any password. Here is the solution.

1. Edit the /etc/sudoers:

   [code language=”bash”]$ sudo vi /etc/sudoers[/code]

2. Add a new entry at the last (USERNAME is your account name).

   [code language=”text” firstline=”18″ highlight=”26″]
   # 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
   USERNAME ALL=(ALL:ALL) NOPASSWD:ALL

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

   #includedir /etc/sudoers.d
   [/code]

3. Restart the sudo service.

   [code language=”bash”]$ sudo service sudo restart[/code]

4. Logout then login again. You won’t be prompted for the password anymore.