Many thanks for the prompt reply. I should have mentioned that I upgraded to v.5.0.1 early today, that made no difference. I've just set 'debug = 1' and restarted. The "weewx" log looks exactly the same (no additional info). Therefore, I haven't repeated it. I'm finding the only log I can see is when using:
If I try the log I used to use on v.4 (i.e. sudo tail -f /var/log/syslog) it just says 'No such file or directory'. Ditto if I replace syslog with messages.
Here is the log without specifically specifying 'weewx' (not sure if this is helpful):
Feb 05 20:40:28 WEATHER ntpd[658]: DNS: dns_take_status:
2.debian.pool.ntp.org=>good, 8
Feb 05 20:40:29 WEATHER ntpd[658]: DNS: dns_probe:
1.debian.pool.ntp.org, cast_flags:8, flags:101
Feb 05 20:40:29 WEATHER ntpd[658]: DNS: dns_check: processing
1.debian.pool.ntp.org, 8, 101
Feb 05 20:40:29 WEATHER ntpd[658]: DNS: Pool skipping: 104.238.174.158
Feb 05 20:40:29 WEATHER ntpd[658]: DNS: Pool skipping: 185.103.119.60
Feb 05 20:40:29 WEATHER ntpd[658]: DNS: Pool skipping: 77.68.81.77
Feb 05 20:40:29 WEATHER ntpd[658]: DNS: Pool skipping: 188.114.116.1
Feb 05 20:40:29 WEATHER ntpd[658]: DNS: dns_take_status:
1.debian.pool.ntp.org=>good, 8
Feb 05 20:40:29 WEATHER sudo[864]: pi : TTY=pts/0 ; PWD=/home/pi ; USER=root ; COMMAND=/usr/bin/journalctl -f
Feb 05 20:40:29 WEATHER sudo[864]: pam_unix(sudo:session): session opened for user root(uid=0) by pi(uid=1000)
Feb 05 20:40:30 WEATHER ntpd[658]: DNS: dns_probe:
0.debian.pool.ntp.org, cast_flags:8, flags:101
Feb 05 20:40:30 WEATHER ntpd[658]: DNS: dns_check: processing
0.debian.pool.ntp.org, 8, 101
Feb 05 20:40:30 WEATHER ntpd[658]: DNS: Pool skipping: 81.128.218.110
Feb 05 20:40:30 WEATHER ntpd[658]: DNS: Pool skipping: 109.74.206.120
Feb 05 20:40:30 WEATHER ntpd[658]: DNS: Pool skipping: 217.114.59.3
Feb 05 20:40:30 WEATHER ntpd[658]: DNS: Pool skipping: 162.159.200.123
Feb 05 20:40:30 WEATHER ntpd[658]: DNS: dns_take_status:
0.debian.pool.ntp.org=>good, 8
Feb 05 20:40:44 WEATHER ntpd[658]: CLOCK: time stepped by 14.228062
Feb 05 20:40:44 WEATHER ntpd[658]: INIT: MRU 10922 entries, 13 hash bits, 65536 bytes
Feb 05 20:40:46 WEATHER systemd[1]: NetworkManager-dispatcher.service: Deactivated successfully.
Feb 05 20:40:47 WEATHER dhcpcd[554]: eth0: no IPv6 Routers available
Feb 05 20:40:50 WEATHER dhcpcd[554]: wlan0: no IPv6 Routers available
Feb 05 20:40:57 WEATHER systemd[1]: systemd-fsckd.service: Deactivated successfully.
Feb 05 20:41:00 WEATHER systemd[1]: systemd-hostnamed.service: Deactivated successfully.
I don't use DHCP - I have a static IP address assigned to the Pi and am using the LAN port, connected to a gigabit ethernet switch. I also prefer IPv4.
I should point out that I have a very basic knowledge of Linux, hence my posting to the group.