I found that after I rebooted the system, the dir /var/run/***
disappeared.
I put my app's web sessions under /var/run. so they got lost.
Is there an effective tool to manage /var/run dirs?

Thank you

--
corey hickman

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On Jul 22, 2024, at 08:08, coreyh@free.fr wrote:

I found that after I rebooted the system, the dir /var/run/*** disappeared.

Yes,
/var/run
is a symlink to /run
And /run is a tmpfs

I put my app's web sessions under /var/run. so they got lost.

Well that was a bad idea if you wanted to have persistent session ids.

Is there an effective tool to manage /var/run dirs?

Thank you

--
corey hickman

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Greg Wooledge (12024-07-22):

The contents of /run (which /var/run points to) are temporary.

And even before /var/run was a link to /run, it was meant to be cleaned
at boot.

Regards,

--
Nicolas George

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On Mon, Jul 22, 2024 at 20:07:38 +0800, coreyh@free.fr wrote:

I found that after I rebooted the system, the dir /var/run/*** disappeared.
I put my app's web sessions under /var/run. so they got lost.
Is there an effective tool to manage /var/run dirs?

hobbit:~$ ls -ld /var/run
lrwxrwxrwx 1 root root 4 Feb 17 12:28 /var/run -> /run/

hobbit:~$ df /run
Filesystem 1K-blocks Used Available Use% Mounted on
tmpfs 1603720 1412 1602308 1% /run

The contents of /run (which /var/run points to) are temporary.
They're only stored in RAM, not on disk. They are *meant* to go away
at boot time.

If you need to store data permanently, put it somewhere else.

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On Monday, 22-07-2024 at 22:15 Henning Follmann wrote:

On Jul 22, 2024, at 08:08, coreyh@free.fr wrote:

I found that after I rebooted the system, the dir /var/run/*** disappeared.

Yes,
/var/run
is a symlink to /run
And /run is a tmpfs

I put my app's web sessions under /var/run. so they got lost.

Well that was a bad idea if you wanted to have persistent session ids.

Would it be appropriate to use the /opt directory?

https://eitca.org/cybersecurity/eitc-is-lsa-linux-system-administration/linux-filesystem/filesystem-layout-continued/examination-review-filesystem-layout-continued/what-is-the-significance-of-the-opt-directory-in-the-linux-filesystem-layout/

To summarize, the "/opt" directory holds significant importance in the Linux filesystem layout. It provides a designated location for optional software installations, separating them from the core operating system components. This separation enhances
system management, security, and integrity.

https://linuxhandbook.com/linux-directory-structure/
/opt – Optional software
Traditionally, the /opt directory is used for installing/storing the files of third-party applications that are not available from the distribution’s repository.
The normal practice is to keep the software code in opt and then link the binary file in the /bin directory so that all the users can run it.

Is there an effective tool to manage /var/run dirs?

Thank you

--
corey hickman

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George at Clug (12024-07-22):

Would it be appropriate to use the /opt directory?

No. If it is VARiable, then it should go under /var. /var/lib/somehting
is traditional, /var/opt/something is an option if you installed under /opt/something.

Regards,

--
Nicolas George

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On Mon, 22 Jul 2024 20:07:38 +0800
coreyh@free.fr wrote:

I found that after I rebooted the system, the dir /var/run/***
disappeared.

As others have pointed out, stuff in /var/run is supposed to disappear
on reboot.

I put my app's web sessions under /var/run. so they got lost.
Is there an effective tool to manage /var/run dirs?

Given the above, a more fruitful question might be, where should I put
my session data? To which I would reply, what's wrong with where your
web server put them before you changed it?


--
Does anybody read signatures any more?

https://charlescurley.com
https://charlescurley.com/blog/

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For coreyh, here is the link to Linux Filesystem Hierarchy, v3: <https://refspecs.linuxfoundation.org/FHS_3.0/fhs-3.0.pdf>. And here
is Wikipedia's page digesting it: <https://en.wikipedia.org/wiki/Filesystem_Hierarchy_Standard>. The
documents discuss where various bits should go, including 11 pieces
for various /var locations.

Thanks for all your help. Now it make sense to me.

--
corey hickman

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