diff --git a/en_US/cloud-platform/cloud-platform.setup.sudo.md b/en_US/cloud-platform/cloud-platform.setup.sudo.md
index 52271a5e..4cdae9c2 100644
--- a/en_US/cloud-platform/cloud-platform.setup.sudo.md
+++ b/en_US/cloud-platform/cloud-platform.setup.sudo.md
@@ -1,6 +1,8 @@
# Setup sudo for cloud deployment
-## What is `sudo`
+[TOC]
+
+## What is `sudo` (Linux) and `doas` (OpenBSD)
From [wikipedia](https://en.wikipedia.org/wiki/Sudo):
@@ -21,14 +23,16 @@ From [wikipedia](https://en.wikipedia.org/wiki/Sudo):
> 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
+OpenBSD uses its own sudo-like program for this purpose, it's called `doas`
+which means *__execute commands as another user__*.
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`.
+target server (via ssh) as a non-privileged user (e.g. user `iredmail`) 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:
+## Linux: Setup sudo
+
+Let's say you're going to connect as user `iredmail`:
* Run command `visudo` as root user.
@@ -40,16 +44,51 @@ Let's say you're going to connect as user `ubuntu`, steps to setup sudo for
* 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
+# Allow user `iredmail` to run all commands without typing its own password.
+iredmail 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
+Defaults:iredmail !requiretty
```
+To verify the sudo configuration, please login as user `iredmail` first, then run
+command:
+
+```
+sudo ls /root/
+```
+
+If sudo is correctly configured, it will show you list of files under `/root`
+directory.
+
+## OpenBSD: Setup doas
+
+Let's say you're going to connect as user `iredmail`.
+
+Append line below to file `/etc/doas.conf` (if this file doesn't exist, please
+create it manually):
+
+```
+permit nopass iredmail as root
+```
+
+To verify the sudo configuration, please login as user `iredmail` first, then run
+command:
+
+```
+doas ls /root/
+```
+
+If sudo is correctly configured, it will show you list of files under `/root`
+directory.
+
## References
-* [sudo manual page](https://www.sudo.ws/man/1.8.3/sudo.man.html)
-* [10 Useful Sudoers Configurations for Setting ‘sudo’ in Linux](https://www.tecmint.com/sudoers-configurations-for-setting-sudo-in-linux/)
-* [Difference Between su and sudo and How to Configure sudo in Linux](https://www.tecmint.com/su-vs-sudo-and-how-to-configure-sudo-in-linux/)
+* Linux `sudo`:
+ * [sudo manual page](https://www.sudo.ws/man/1.8.3/sudo.man.html)
+ * [10 Useful Sudoers Configurations for Setting ‘sudo’ in Linux](https://www.tecmint.com/sudoers-configurations-for-setting-sudo-in-linux/)
+ * [Difference Between su and sudo and How to Configure sudo in Linux](https://www.tecmint.com/su-vs-sudo-and-how-to-configure-sudo-in-linux/)
+* OpenBSD `doas`:
+ * [doas(5) manual page](https://man.openbsd.org/doas.conf.5)
+ * [doas(1) manual page](https://man.openbsd.org/doas.1)
diff --git a/html/cloud-platform.setup.sudo.html b/html/cloud-platform.setup.sudo.html
index fd91acb2..82517417 100644
--- a/html/cloud-platform.setup.sudo.html
+++ b/html/cloud-platform.setup.sudo.html
@@ -16,7 +16,18 @@
iRedMail
// Document IndexSetup sudo for cloud deployment
-What is sudo
+
+What is sudo (Linux) and doas (OpenBSD)
From wikipedia:
sudo is a program for Unix-like computer operating systems that allows users
@@ -35,12 +46,13 @@ 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
+OpenBSD uses its own sudo-like program for this purpose, it's called doas
+which means execute commands as another user.
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:
+target server (via ssh) as a non-privileged user (e.g. user iredmail) which
+is allowed to run command as root with sudo.
+Linux: Setup sudo
+Let's say you're going to connect as user iredmail:
-# Allow user `ubuntu` to run all commands without typing its own password.
-ubuntu ALL=(ALL) NOPASSWD: ALL
+# Allow user `iredmail` to run all commands without typing its own password.
+iredmail 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
+Defaults:iredmail !requiretty
+To verify the sudo configuration, please login as user iredmail first, then run
+command:
+sudo ls /root/
+
+
+If sudo is correctly configured, it will show you list of files under /root
+directory.
+OpenBSD: Setup doas
+Let's say you're going to connect as user iredmail.
+Append line below to file /etc/doas.conf (if this file doesn't exist, please
+create it manually):
+permit nopass iredmail as root
+
+
+To verify the sudo configuration, please login as user iredmail first, then run
+command:
+doas ls /root/
+
+
+If sudo is correctly configured, it will show you list of files under /root
+directory.
References
+- Linux
sudo:
+
+- OpenBSD
doas:
+