postfix delete email by subject
To list From, To and Subject from all safematix.com emails
mailq | awk '/ Sep .*safematix.com/{ print $1 }' | tr -d \* | while read id; do postcat -q "$id" | egrep '^(Subject|From|To):'; echo; done
To delete all emails from safematix.com, with subject tbd
mailq | awk '/ Sep .*safematix.com/{ print $1 }' | tr -d \* | while read id; do postcat -q "$id" | grep "^Subject: tbd" > /dev/null && echo $id; done | postsuper -d -
ntpd and OpenNTPD status
ntpd
ntpq -p
ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
*ts1.safematix.com 192.168.0.1 2 u 19 64 377 0.572 -0.064 0.173
+ts2.safematix.com 192.168.0.2 3 u 28 64 377 0.406 0.021 0.298
OpenNTPD
Since OpenBSD 5.5, you have the tool ntpctl
ntpctl -s all
ntpctl -s all
4/4 peers valid, clock unsynced
peer
wt tl st next poll offset delay jitter
82.197.188.130 from pool ch.pool.ntp.org
1 10 2 29s 32s 0.268ms 8.530ms 1.015ms
212.51.144.44 from pool ch.pool.ntp.org
1 10 1 31s 33s 0.075ms 9.118ms 0.575ms
91.235.212.22 from pool ch.pool.ntp.org
1 10 2 1s 32s -0.835ms 9.015ms 0.791ms
91.240.0.5 from pool ch.pool.ntp.org
1 10 3 5s 32s 0.459ms 9.860ms 1.492ms
rsync not older
Copy all data are not older than 23 days.
Version 01 – from file path
find /var/log/nginx -mtime -23 -printf %P\\0 | rsync -av --files-from=- --from0 /var/log/nginx/ safematix@172.23.0.23:/srv/safematix/
Version 02 – full path
find /var/log/nginx -mtime -23 -print0 | rsync -av --files-from=- --from0 / safematix@172.23.0.23:/srv/safematix/
openssl self signed certificate one liner
openssl req -new -newkey rsa:4096 -sha256 -days 3650 -nodes -x509 -keyout www.safematix.com.key -out www.safematix.com.crt -subj /C=CH/ST=Zurich/L=Zurich/O=Safematix/CN=www.safematix.com
