2.5 KiB
Setup sudo
What is sudo
From wikipedia:
sudo is a program for Unix-like computer operating systems that allows users to run programs with the security privileges of another user, by default the superuser
root. It originally stood for "superuser do" as the older versions of sudo were designed to run commands only as the superuser. However, the later versions added support for running commands not only as the superuser but also as other (restricted) users, ...Unlike the similar command
su, users must, by default, supply their own password for authentication, rather than the password of the target user. After authentication, and if the configuration file, which is typically located at/etc/sudoers, permits the user access, the system invokes the requested command. The configuration file offers detailed access permissions, including enabling commands only from the invoking terminal; requiring a password per user or group; requiring re-entry of a password every time or never requiring a password at all for a particular command line. It can also be configured to permit passing arguments or multiple commands.
Setup sudo for iRedMail cloud deployment
With the iRedMail cloud platform, you can deploy iRedMail by connecting to
target server via ssh as a non-privileged user (e.g. ubuntu) which is allowed
to run command as root with sudo.
Let's say you're going to connect as user ubuntu, steps to setup sudo for
ubuntu user:
-
Run command
visudoas root user.Although you can edit sudo config file
/etc/sudoerswith your favourite text editor, butvisudowill help check syntax while saving changes. this is helpful to avoid some mistakes like misspelled username, or any other keyword. -
Add lines below at the end, save your changes and quit
visudo.
# Allow user `ubuntu` to run all commands without typing its own password.
ubuntu ALL=(ALL) NOPASSWD: ALL
# We're going to connect without a real tty, below setting will speed up the
# iRedMail deployment process.
Defaults:ubuntu !requiretty