Code-Memo

Time management (NTP, timedatectl)

timedatectl (systemd)

Status:

timedatectl status

Set timezone:

timedatectl list-timezones | grep -i "europe"
sudo timedatectl set-timezone Europe/Athens

Enable/disable NTP (systemd-timesyncd or other backend):

sudo timedatectl set-ntp true
sudo timedatectl set-ntp false

NTP implementations

Common options:

• systemd-timesyncd (simple SNTP client)
• chrony (common default on many distros)
• ntpd (traditional NTP daemon)

chrony quick commands (if installed)

chronyc sources
chronyc tracking

Troubleshooting checklist

• Verify timezone is correct (humans care) and UTC offset matches expectation
• Ensure NTP is enabled and allowed through firewall (UDP/123) where needed
• Confirm no VM host time sync conflicts (cloud/virtualization)