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sudo / su

who knew.

preserve environment from user

so you've exported some environment variables and want to run a command via sudo and pass the variables along?

sudo --preserve-env

run command as another user with no login shell

assuming a user as the shell set to /usr/sbin/nologin but you want to run a command as this user, for, say accepting /testing an ssh connection.

su -s /bin/sh -c '/the/' theOtherUser

disable DNS for sudo command

When your sudo command hangs for a while, it's doing some DNS resolution in the background until it times out or gets an answer. Apparently this is not the default but was set as a default by Debian and Ubuntu etc., so just run:

sudo visudo

and add this to the end of the sudoers file:

Defaults !fqdn

thank you

allow user to run commands as root without password

well, let's give jonas all access without entering a password. 🤷‍♂️

visudo # run this to open the editor, add the following line

sudoers file ordering

if your NOPASSWD option from above doesn't work, the ordering matters:

When multiple entries match for a user, they are applied in order. Where there are multiple matches, the last match is used (which is not necessarily the most specific match).