Add time to log.

[ozgurerdogan]

How can I add full date to logs. My cron is:
sh /Backup-Vms.sh > /Backup-Vms.log 2>&1

and is sh:
ssh boxtobackup "zfs-autobackup -v s1d1 D8 --keep-source=40 --keep-target=40 --strip-path=2 --clear-mountpoint --clear-refreservation --no-holds --snapshot-format %Y-%m-%d-%H:%M:%S --force --destroy-missing=10d";

And logs are:

Synchronising

[Source] D2/vm-138-disk-0: sending to D8/vm-138-disk-0
[Source] D2/vm-138-disk-0@2023-11-06-17:00:03: Destroying
[Target] D8/vm-138-disk-0@2023-11-06-17:00:03: Destroying
[Target] D8/vm-138-disk-0@2023-11-12-11:00:03: receiving incremental
[Source] D2/vm-179-disk-0: sending to D8/vm-179-disk-0

So can I prepend date and time to logs?

[psy0rz]

you want to prepend the date/time to every line?

[ozgurerdogan]

yes

[psy0rz]

Pipe the output through this:

(your command...)| awk '{ print strftime("[%Y-%m-%d %H:%M:%S]"), $0; fflush(); }'

yes, gpt4 did this :)

[ozgurerdogan]

So something like this:

(ssh boxtobackup "zfs-autobackup -v s1d1 D8 --keep-source=40 --keep-target=40 --strip-path=2 --clear-mountpoint --clear-refreservation --no-holds --snapshot-format %Y-%m-%d-%H:%M:%S --force --destroy-missing=10d";) | awk '{ print strftime("[%Y-%m-%d %H:%M:%S]"), $0; fflush(); }'