How to Install NTP Time Servers on AlmaLinux 9 VPS

This article provides a guide for how to install NTP time servers on AlmaLinux 9 VPS servers.

To install NTP time servers on AlmaLinux 9 VPS, the following conditions must be met:

NTP stands for Network Time Protocol and is used for clock synchronization across multiple computers.

To install NTP time servers on AlmaLinux 9 VPS, you can use chrony, which is the default NTP client and server on AlmaLinux.

Here are the steps to follow:

Login using SSH terminal to your AlmaLinux VPS:
Install chrony with the command:
```
sudo dnf install chrony
```
Enable chrony to start automatically at boot with the command:
```
sudo systemctl enable --now chronyd
```
Configure chrony as an NTP server by editing the file /etc/chrony.conf and adding the line allow <network> for each network that you want to serve. For example, allow 192.168.1.0/24 will allow the 192.168.1.0/24 network to sync with your NTP server.
Restart chrony with the command:
```
sudo systemctl restart chronyd
```
If you have firewalld enabled, you need to allow the port 123 for NTP with the command:
```
sudo firewall-cmd --permanent --add-service=ntp && sudo firewall-cmd --reload
```

The NTP time servers are now successfully installed on your AlmaLinux 9 VPS.