Re: [CentOS] how to clear out /var/cache?

[Gianluca Cecchi]

Il Ven 31 Dic 2021, 03:39 Fred  ha scritto:
[snip]

>
>
> > --On Thursday, December 30, 2021 6:20 PM -0500 Fred <
> fred.fre...@gmail.com>
> >
> > wrote:
> >
> > > Mine has hit over 3 gigs, making it one of the larger directories in /,
> > > which is running low on space. I've hit all the low-hanging fruit I can
> > > find and now I come to things like /var/cache, and I don't know what to
> > do
> > > about such.
> >
>

If you go into /var/cache and run
du -sh *
you should see which subdirectories take more space and so on going through
their subdirectories... to pinpoint the main specific  component
responsible of the space occupation..

With the * in the command above you don't catch elements (files or
directories) beginning with a . but I don't think there are normally this
kind of objects... Just in case you can run a
ll -a
to be sure of that..
Hih,
Gianluca
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Re: [CentOS] how to clear out /var/cache?

[Kenneth Porter]

On 12/30/2021 6:39 PM, Fred wrote:

but I still don't know the proper way to clear out a lot of this stuff. I
certainly don't want to hose my system.


My next step, on finding a candidate pig, would be to use "rpm -qf" to 
identify which package owns the pig, and then look at how to clean that 
package's junk and reduce its growth.



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Re: [CentOS] how to clear out /var/cache?

[Fred]

Skylar: that's more or less what I've been doing, looking for huge things
in /.

Kenneth: the latest version of kdirstat appears to now be named qdirstat,
no kde bits required. it is certainly a handy way to quickly find the disk
space sinks. Thanks for the pointer.

but I still don't know the proper way to clear out a lot of this stuff. I
certainly don't want to hose my system.

It is C7, up to date, and it has been running for at least five years with
partitions as they are set now: / is 50 gigs. had a popup message this
morning telling me that / was nearly full. found it with 2 gigs free.
sounds as if something has been slowly eating away at the space. I could
use gparted to rearrange things, making / bigger, but as it has been going
for five years, it strikes me that it more likely needs a lot of garbage
collection to be done. I've manually cleaned up some detritus, it now
reports 3.7G free which should hold me for a little while.

So, can anyone advise me on what is and what is not safe to whack/delete
from the root partition?

Thanks!

Fred

On Thu, Dec 30, 2021 at 7:16 PM Kenneth Porter 
wrote:

> --On Thursday, December 30, 2021 6:20 PM -0500 Fred 
>
> wrote:
>
> > Mine has hit over 3 gigs, making it one of the larger directories in /,
> > which is running low on space. I've hit all the low-hanging fruit I can
> > find and now I come to things like /var/cache, and I don't know what to
> do
> > about such.
>
> Have you run KDirStat to find the disk pigs? I regularly use its Windows
> derivative, WinDirStat.
>
> 
> 
>
> I wish there was a web-based version for headless servers without X
> libraries.
>
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Re: [CentOS] how to clear out /var/cache?

[Kenneth Porter]

--On Thursday, December 30, 2021 6:20 PM -0500 Fred  
wrote:



Mine has hit over 3 gigs, making it one of the larger directories in /,
which is running low on space. I've hit all the low-hanging fruit I can
find and now I come to things like /var/cache, and I don't know what to do
about such.


Have you run KDirStat to find the disk pigs? I regularly use its Windows 
derivative, WinDirStat.





I wish there was a web-based version for headless servers without X 
libraries.


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Re: [CentOS] how to clear out /var/cache?

[Skylar Thompson]

The FHS specification says that applications using /var/cache should expect
those data to disappear anytime, so under a strict interpretation it should
be safe to remove everything. Practically, though, I don't know that I'd
trust every application to adhere to that, so it might be worth looking at
what applications are the biggest users of the directory and making
targeted deletions or even application-specific tools to remove the data
(i.e. "yum clean all").

On Thu, Dec 30, 2021 at 06:20:15PM -0500, Fred wrote:
> Is it safe to just remove files from /var/cache on a running system, or is
> there a correct procedure for doing that?
> 
> Mine has hit over 3 gigs, making it one of the larger directories in /,
> which is running low on space. I've hit all the low-hanging fruit I can
> find and now I come to things like /var/cache, and I don't know what to do
> about such.
> 
> Thanks in advance!

-- 
-- Skylar Thompson (skyl...@u.washington.edu)
-- Genome Sciences Department (UW Medicine), System Administrator
-- Foege Building S046, (206)-685-7354
-- Pronouns: He/Him/His
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[CentOS] how to clear out /var/cache?

[Fred]

Is it safe to just remove files from /var/cache on a running system, or is
there a correct procedure for doing that?

Mine has hit over 3 gigs, making it one of the larger directories in /,
which is running low on space. I've hit all the low-hanging fruit I can
find and now I come to things like /var/cache, and I don't know what to do
about such.

Thanks in advance!

Fred
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Re: [CentOS] Delete local user/group but not LDAP one

[Anthony K]

On 31/12/21 12:34 am, Anthony K wrote:

On 26/11/21 6:27 pm, Felix Natter wrote:


How about if I disable networking so that the LDAP Server is not
reachable (pingable) before running luserdel/lgroupdel? Would that be
100% safe?



Why not create a test user, that has similar settings to the real user account 
you are trying to affect, and test with it.  Is it that hard to do?


Oddly, that was showing up as a recent message in my CentOS list until after I 
posted.  Ignore me if already resolved.

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Re: [CentOS] Delete local user/group but not LDAP one

[Anthony K]

On 26/11/21 6:27 pm, Felix Natter wrote:


How about if I disable networking so that the LDAP Server is not
reachable (pingable) before running luserdel/lgroupdel? Would that be
100% safe?



Why not create a test user, that has similar settings to the real user account 
you are trying to affect, and test with it.  Is it that hard to do?
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