# 3. \[FRCA🍁] Guide: Setup chrony for good server time sync.

## 1. Installation

Install chrony :

```bash
sudo apt-get install chrony -y
```

Create chrony configuration file :

```bash
sudo nano /etc/chrony/chrony.conf
```

Paste the following inside :

```bash
pool time.google.com       iburst minpoll 2 maxpoll 2 maxsources 3 maxdelay 0.3
pool time.facebook.com     iburst minpoll 2 maxpoll 2 maxsources 3 maxdelay 0.3
pool time.euro.apple.com   iburst minpoll 2 maxpoll 2 maxsources 3 maxdelay 0.3
pool time.apple.com        iburst minpoll 2 maxpoll 2 maxsources 3 maxdelay 0.3
pool ntp.ubuntu.com        iburst minpoll 2 maxpoll 2 maxsources 3 maxdelay 0.3

# This directive specify the location of the file containing ID/key pairs for
# NTP authentication.
keyfile /etc/chrony/chrony.keys

# This directive specify the file into which chronyd will store the rate
# information.
driftfile /var/lib/chrony/chrony.drift

# Uncomment the following line to turn logging on.
#log tracking measurements statistics

# Log files location.
logdir /var/log/chrony

# Stop bad estimates upsetting machine clock.
maxupdateskew 5.0

# This directive enables kernel synchronisation (every 11 minutes) of the
# real-time clock. Note that it can’t be used along with the 'rtcfile' directive.
rtcsync

# Step the system clock instead of slewing it if the adjustment is larger than
# one second, but only in the first three clock updates.
makestep 0.1 -1

# Get TAI-UTC offset and leap seconds from the system tz database
leapsectz right/UTC

# Serve time even if not synchronized to a time source.
local stratum 10
```

Save File and restart chrony in order for config change to take effect :

```bash
systemctl restart chronyd.service
```