[SOLVED] How can I use the `at` command in Mageia Terminal?

[tdmsoares]

I want to set my computer to suspend after 30 minutes from now. I already know how set to suspend my computer right now, I type the following in terminal:

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$ pm-suspend

Searching in internet, I found the solution is to type:

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$ echo pm-hibernate | sudo at now + 30 min

But when I type the above in my Terminal, I get that message: at: command not found

Is this command not default in Linux? Is it a command from a particular distro and, if so, how can I substitute it?

Thanks!

[Ken-Bergen]

Your problem is not with at but with sudo
See

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man visudo

for information on setting up sudo.

[tdmsoares]

Even when I log as Root (not using `sudo`) I have the same problem

[Ken-Bergen]

As I didn't install "at" I assumed it was installed by default.
If you used the Live CD or DVD perhaps not.
Anyway it's in the repositories so install it and try again.

[doktor5000]

If you used the Live CD or DVD perhaps not.

I think it's not even included in a regular install from DVD, as when I install chrome on a fresh install it always pulls in at ...

[tdmsoares]

`at` wasn't installed in my system... I just installed, but I found only the version for 32 bits...

After restarting the system, now I can type the command below without warnings:

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$ echo pm-suspend | sudo at now + 1 min

The only problem I'm facing now is that command doesn't work: after one minute, for example as above, the system doesn't suspend

Is there something I missed?

[Ken-Bergen]

The only problem I'm facing now is that command doesn't work: after one minute, for example as above, the system doesn't suspend

Is there something I missed?

It works for me.

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[ken@localhost]$ echo pm-suspend | sudo at now + 1 min
warning: commands will be executed using (in order) a) $SHELL b) login shell c) /bin/sh                                                                     
job 4 at Sun Jun 12 17:54:00 2016

What do you see?

[tdmsoares]

I see the same warning, like the one you posted. In that case, probably you ran the command at 17:53 I guess...
The problem when the scheduled time comes, nothing happens...
I don't know if your computer suspended at 17:54, did it?

[Ken-Bergen]

I don't know if your computer suspended at 17:54, did it?

Yes it did.

[tdmsoares]

I don't know why the command doesn't work for me...
The only available version of `at` in repository was i586, my system is x86_64, does it make any difference?

Maybe the best solution is to uninstal `at` and make a workaround with crontab using shell script...

I am doing something like that in vim:

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sleep 60
pm-suspend


[Ken-Bergen]

I don't know why the command doesn't work for me...
The only available version of `at` in repository was i586, my system is x86_64, does it make any difference?

There is a 64bit version of at in the repositories which is what I have installed.
It would seem your sources are miss-configured or the mirror you're using is bad.

[doktor5000]

Please show the output of

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urpmq --list-media active --list-url

[tdmsoares]

Please show the output of

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urpmq --list-media active --list-url

I get this:

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[tdms@localhost ~]$ urpmq --list-media active --list-url
Core Release cdrom://x86_64/media/core
Nonfree Release cdrom://x86_64/media/nonfree
Core Release2 http://ftp.las.ic.unicamp.br/pub/mageia/distrib/5/x86_64/media/core/release
Core Updates http://ftp.las.ic.unicamp.br/pub/mageia/distrib/5/x86_64/media/core/updates
Nonfree Release2 http://ftp.las.ic.unicamp.br/pub/mageia/distrib/5/x86_64/media/nonfree/release
Nonfree Updates http://ftp.las.ic.unicamp.br/pub/mageia/distrib/5/x86_64/media/nonfree/updates
Tainted Release http://ftp.las.ic.unicamp.br/pub/mageia/distrib/5/x86_64/media/tainted/release
Tainted Updates http://ftp.las.ic.unicamp.br/pub/mageia/distrib/5/x86_64/media/tainted/updates
Core 32bit Release http://ftp.las.ic.unicamp.br/pub/mageia/distrib/5/i586/media/core/release
Core 32bit Updates http://ftp.las.ic.unicamp.br/pub/mageia/distrib/5/i586/media/core/updates
Nonfree 32bit Release http://ftp.las.ic.unicamp.br/pub/mageia/distrib/5/i586/media/nonfree/release
Nonfree 32bit Updates http://ftp.las.ic.unicamp.br/pub/mageia/distrib/5/i586/media/nonfree/updates



I think I have both repositories for 32 and 64 bits. Why do I have a repository named Core Release and Core Release 2, is there any difference?

[Ken-Bergen]

Core Release cdrom: is a subset of the online Core Release2.
at is present on http://ftp.las.ic.unicamp.br/pub/mageia/distrib/5/x86_64/media/core/release so in a console as root

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urpme at

then

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urpmi at

should get you the x86_64 version.

[tdmsoares]

Core Release cdrom: is a subset of the online Core Release2.
at is present on http://ftp.las.ic.unicamp.br/pub/mageia/distrib/5/x86_64/media/core/release so in a console as root

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urpme at

then

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urpmi at

should get you the x86_64 version.

It finally worked!!! Thank you!
So, it was only a problem with the version of at, right?

Although the problem is solved, I have some questions remaining: Why in MCC before, it showed only the i586 version, and now only typing the code

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urpme at

and

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urpmi at

without any setup in repositories I could install the x86_64 version?

Is the i586 version not compatible with a 64 bits OS anymore?

[doktor5000]

So, it was only a problem with the version of at, right?

No, not with the version but the architecture.

Although the problem is solved, I have some questions remaining: Why in MCC before, it showed only the i586 version, and now only typing the code without any setup in repositories I could install the x86_64 version?

urpmi will default to --strict-arch, so if there is the same package both for i586 and x86_64 and you only install a package by name it will always install the package for your native architecture.

In MCC if you explicitly select the i586 version, it will install that which is not what you want.
And in general you can run i586 code under x86_64, but not the other way around. Why it didn't work for at for you, is hard to tell without further information/debugging.

[tdmsoares]

I think better than only solve the problems is to learn a little bit more
Thank you for the answers!

[doktor5000]

I think better than only solve the problems is to learn a little bit more

Yes, exactly. Feel free to ask if anything is still unclear.

FWIW, usually I assume if people don't ask further questions than their needs are fulfilled. I stopped at some point explaining stuff to everybody in detail, as the vast majority of forum users will simply ignore it, and ask the same question few months later again, having not learned anything and having forgotten the several threads where they asked about that same issue already before