Hacker News Reader

Comment by BowBun | Hacker News Reader

Problem is you can't get timestamps and run times of your commands 'when you really need it', unlike almost everything else

View on HN

As an alternative, perennial HN recommendation atuin (https://atuin.sh) logs time, duration and exit code (among other data) for every command.

That way you only have to look at it when you need it, and you can also figure out what you were doing last week/month/year if necessary.

After mucking around for an hour trying to get this information into my prompt, I realised atuin already had it.

For a personal workstation - you should never "really need it".

It's a personal machine and should be treated as disposable. Doing anything less is fairly irresponsible.

So sure - turn on timestamps for your ssh bastion (although it should be in the logs already...), or turn them on for the ci/cd pipeline (not that you should need them there anyways, since it should be dumping tons of timing info already).

But a personal machine? Plain ol' ">" is plenty.

Not that there's anything wrong with a maximal prompt either... I've definitely done the "configure all the powerline settings!" thing. But I also don't mind a simple ">" or "#".

Why the timestamps are that important? Honestly asking.

You can always time your commands with "time".

I personally use a modified zbell (in zsh) to give me a notification when a command finishes after 30 seconds, and send me an email if it takes over 2 minutes.

I generally use Konsole's "notify when program exits" feature. For longer tasks, I have a small tool which I pipe to, and it sends me push notification with the output (if I prefer).

I had a tool I'd pipe to, but I'd often only think about it after I'd realize that the command was going to take a while. A push notification sound cool; I used email because I knew how to hack it together with curl.

Here's one zbell implementation, not sure it's the original but it looks like it does the trick: https://gist.github.com/oknowton/8346801

Thanks for sharing the bell. I'll take a look. If you want to try push notifications, I use https://pushover.net as a service.

I developed the tool myself, and it's at https://git.sr.ht/~bayindirh/nudge if you feel like checking it out.

If you want to host the whole push notification infrastructure, you can look at https://ntfy.sh which also can be integrated with cURL.

This is incredibly helpful, thank you. I had no idea push notifications was something I could self-host.

You're absolutely welcome. Me neither. If I could find ntfy.sh earlier, I'd have written nudge for it, not for Pushover.

When you’re debugging, especially a complex system, especially during an outage or postmortem, understanding when your commands executed relative to when your log lines appeared is really helpful.

Oh, that's an interesting use case, alright.

sounds like your describing https://linux.die.net/man/1/ts

That's a poor and hacky substitute of using Linux audit features. It's perhaps the right robustness/complexity trade off for my personal machine, but for work they likely already have audit features turned on and you can access the timing from there.

I think you need to put a number on "likely", here. 80% of all workplaces, maybe? Even that seems a little high. There are a surprising number of devs who have never even heard of auditd. It's just not the kind of thing most people come across in their day to day work unless they go digging for it, or come from a security or DevOps background or something.

That's a good reason to have timestamps in the history, which you should.

Something like

  export HISTFILESIZE=
  export HISTSIZE=
  export HISTTIMEFORMAT="[%F %T] "
  shopt -s histappend

really ought to be default in bash.

It's not as clear why you need it in the interactive prompt.

I didn't make it quite as clear as I should: the reason to have it in the prompt is mostly so that you, or someone you're working with, can spot a trend you may not consciously think to look for if the timestamps weren't in front of you.

It sounds silly, but it has saved my butt more than once. Especially if you have bugs that e.g. only show up once per hour on the hour, and are otherwise fine.

Well, that's why you build it into the prompt. So you don't give yourself the opportunity to forget.

Reply on news.ycombinator.com