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Enterprise company using CentOS

Hi all

We are about to create a business case for migrate RHEL to CentOS for all or
a subset of our RHEL holdings. I have two questions that I hope to get help
answering.
1. I want to get in touch with a company that have done this journey on an
Enterprise company.
2. Suggestion/recommendation of vendors that can provide support for CentOs.

Scop:
North Europe
Number of RHEL +8.000
Support 24x7

Thanks
//mats

Down C6 ALL without torrent ?

Hi,

I have a machine with a BIOS that does not permit DVD installation. It
accepts everything else including some old superseded media types.

Is it possible to download C6 combined parts 1 and 2 not using Torrent ?

I have an aversion to using anything that comes from unknown sources, as
used by Torrent.

Thank you.

CentOS 7.4 paniced when running LTP tests

LTP version: ltp-full-20180118
Kernel version: 3.10.0-693.el7.x86_64
Reproduce procedure:
1. cd ltp-full-20180118; ./configure; make && make install
2.

rpc.statd is not running but is required for remote locking.

Hello

I'm trying to mount a nfs system. But i receive this message:

mount -t nfs <IP>:/backup /backupnfs
mount.nfs: rpc.statd is not running but is required for remote locking.
mount.nfs: Either use '-o nolock' to keep locks local, or start statd.
mount.nfs: an incorrect mount option was specified

After a fews searchs on google

i tried to execute the files:

sbin/rpc.statd
/usr/sbin/start-statd

Nvidia-detect error with on HP Z4 (CentOS 6.9)

Hi all,

I'm testing an installation of nvidia drivers on a HP Z4 workstation
(nvidia Quadro P600) with CentOS 6.9. Running nvidia-detect with this
setup gives the following output:

# nvidia-detect
Error getting device_class

nvidia-detect also quits with exit-code 255.
Could this be a bug in nvidia-detect?

YUM4/DNF for CentOS updates announcement

I am pleased to announce some significant updates to our ConfigManagement
Special Interest Group for YUM4. This provides YUM4, based on DNF
technology, for testing on CentOS Linux 7/x86_64. These updates are based
on feedback from our prior test release last October. It includes signed
packages, core DNF plugins, and uses a version of RPM very similar to and
compatible with the upcoming version of CentOS 7.5.

This initiative is based on a partnership with the upstream YUM and DNF
maintainers for the future of package management.

Create CentOS 6 system as "clone" of another - with LVM and different disk sizes

Hi,

I just found myself having to set up a new CentOS 6 system with a nearly
identical configuration to an existing host, so I thought I would just

1. Do a minimal install to set up partitions etc. on the new system.
2. Create an image of the existing system using Clonezilla
(<a href="http://www.clonezilla.org" title="http://www.clonezilla.org">http://www.clonezilla.org</a>)
3. Run a Clonezilla restore on the new system.

- as I though it would be a lot simpler than replicating the exact
package selection, installing the same users, doing the same manual
config edits (which are required) etc.

It turns out that it wasn't quite as easy, though.

Wich is best for backup? nfs of iscsi?

Hello

I have a CentOS VM with a lots of inodes, and 500GB +/-, running under
hyper-v . Which is best for backup them? What is the pros and cons?

Thanks for attention.

motion

Got a CentOS 7 box running motion. Selinux is complaining that one of the
scripts motion runs is mislabeled. Here's what it is.
system_u:object_r:nfs_t:s0 /home/motion/bin/on_move_end

Now, ~motion is NFS mounted, and we've got use_nfs_home_dirs --> on, so
what *would* the proper label be, or do I really need to create a policy
for this?

mark

Help with yum

I just did a fresh minimal install of centos 7 on new hardware. While
playing around with window systems I removed X windows like so:

and then tried to re install

which gives this error:

Maybe run: yum groups mark install (see man yum)
No packages in any requested group available to install or upgrade

I tried running:

and get the same message. I tried different permutations removing the
"s" on groups. Nothing seems to bring back the yum "X Window system"
group.

Windows PC PostScript printer driver -> CUPS data import fails

Hi all,

For some years now I have been using a simple system I found online which
allows me to easily import data from Windows Programs.

Hopefully others out there are using the system and already have found the
answer to my problem.

I have installed on my Centos server a virtual CUPS printer which receives a
PS file, and then runs 'ps2pdf' and 'pdftotext -layout' to end up with a text
file.

On the Windows PC's it's simply a case of installing a printer pointing to
this server, and using the HP Colour Laster 2800 PS drivers.

Now to my problem.

Ansible repository shenanigans in EL7

For those not aware ansible has been deprecated in RHEL7 from the extras
repository.

In the RHEL specific world it's now in an optional "product" (basically an
optional subscription) that is part of any RHEL subscription, but it's opt
in.

As a result ansible is back in the EPEL7 repository for 2.5.0+ , having
been removed for ansible 2.4.2 when it got introduced to the RHEL extras
repo.

I have no idea what, if anything, the CentOS team will do with the ansible
in the CentOS7 extras repository.

CentOS-announce Digest, Vol 158, Issue 1

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Today's Topics:

1.

iscsiadm: Could not perform SendTargets discovery: encountered non-retryable iSCSI login failure

Hello

I know this not the place to ask help, but i can't send messages to iscsi
list. :(

I have 3 CentOS 6 connecting to a ISCSI server with Targecli suddenly they
lost connection and i receive this error when i performance iscsiadm --mode
discovery --type sendtargets --portal x.x.x.x

iscsiadm: Could not perform SendTargets discovery: encountered
non-retryable iSCSI login failure

I have already changed the password for the ACLs.

Thanks for attention.

Do you blog about CentOS?

Do you blog about CentOS? Or about Linux in general? We need your voice.

As mentioned on
<a href="https://blog.centos.org/2018/04/seven-centos-org-is-dead-long-life-to-blog-centos-org/" title="https://blog.centos.org/2018/04/seven-centos-org-is-dead-long-life-to-blog-centos-org/">https://blog.centos.org/2018/04/seven-centos-org-is-dead-long-life-to-bl...</a>
this morning, authentication for blog.centos.org is tied to
accounts.centos.org (through OpenID). So if you have a CentOS account,
you have an account on the blog server. We would love to have your
articles there - hear about what you're doing on top of this awesome
platform.

On the other hand, if you have your own blog, and you're writing CentOS
content there, please let me know about that, too.

XScreenSaver

Hi,

I'm currently moving all our local school's desktop clients from
Slackware 14.1 to CentOS 7 + Xfce. Right now I'm fine-tuning the default
user profile.

I have a problem with XScreenSaver. The application per se works very
well. Only there's a hard-coded pop-up window that reminds the user that
he's not running the latest version. So, if I'm running version 5.36 as
provided by the EPEL repo and not the latest and greatest 5.38 as
provided upstream, I get a pestering pop-up window informing me that
YOUR VERSION OF XSCREENSAVER IS VERY OLD.

CentOS 7 + MariaDB + phpMyAdmin

I can't seem to get phpMyAdmin working. I got the ip address problem (permission) resolved, but now I'm getting a "Parallels H-Sphere" error "Error 404: File Not found". I've looked in all the logs and cannot determine what file is not found.

Frank M. Ramaekers Jr. | Systems Programmer | Information Technology | American Income Life Insurance Company | 254-761-6649 (732-6649)

DHCPv6 prefix delegation

Is there an DHCPv6 client in CentOS that supports prefix delegation
correctly? The old version of dhclient can't set a requested prefix
delegation length, so isn't very useful, and I can't get the even-older
wide-dhcpv6 from EPEL to work.

CentOS 7 + Xfce + GDM : disable "switch user" ?

Hi,

I have CentOS 7 + Xfce + GDM installed on all our local school's desktop
clients.

I'd like to disable the "switch user" menu entry, since our desktop
clients have a relatively limited amount of RAM. Most users tend to use
the "switch user" functionality to log off, and at the end of the day,
the computer has no RAM left.

I know there is a way to disable this functionality, I vaguely remember
having it done a few years ago on Slackware.

Any suggestions ?

Niki

Semi-OT: install python package in userspace

CentOS 7 box. As there's no package in any of the repos, we're trying to
install scikit-learn in the user's space. It refuses.

invalid mirror .host-engine.com

Hello,

how can I prevent of using these mirrors?

# yum clean all
Loaded plugins: fastestmirror, security
Cleaning repos: base extras updates
Cleaning up Everything
Cleaning up list of fastest mirrors
# yum update
Loaded plugins: fastestmirror, security
Setting up Update Process
Determining fastest mirrors
* base: centos.den.host-engine.com
* extras: centos.den.host-engine.com
* updates: centos.den.host-engine.com
<a href="http://centos.den.host-engine.com/6/os/x86_64/repodata/repomd.xml:" title="http://centos.den.host-engine.com/6/os/x86_64/repodata/repomd.xml:">http://centos.den.host-engine.com/6/os/x86_64/repodata/repomd.xml:</a>
[Errno 12] Timeout on
<a href="http://centos.den.host-engine.com/6/os/x86_64/repodata/repomd.xml:" title="http://centos.den.host-engine.com/6/os/x86_64/repodata/repomd.xml:">http://centos.den.host-engine.com/6/os/x86_64/repodata/repomd.xml:</a> (28,
'Operation

Unable to access network from docker container

I have recently installed docker and playing around with it. On a CentOS 7 machine, however, I am unable to get access to the outside internet, thus yum ... fails. The host machine runs fine.

I am wondering if there are some networking setting on the host I need to modify to allow the docker container to connect to the outside?

Centos 7 LAPP setup PHP 5 vs 7

Another questions regarding my new server setup.

As with the Postgresql setup, different pages describing setting up a Centos
LAPP server have differing opinions about PHP versions.

The default distro's appear to still be installing PHP5 while some sites
instruct on how to install PHP7.

I am porting my old server which must be 10 years old, running Fedora 9 and
PHP5 onto the new server, so presumably sticking with PHP5 would be the
easier option.

However, I am looking to give my new server as long a life as possible, so
should I instead be looking at PHP7?

I have literally thousonds

Centos 7 LAPP setup Postgresql version and setup

Hi all,

I've got a nice shiny new server which I'm going to build as a LAPP platform.

I've just had a quick look for suitable instructions on the best way to
configure it and I have a few questions. There are many hits, some better
than others.

(It is replacing a Fedora 9 server so I'm expecting to have lots of *fun*)

1) 9.2 vs 9.5

Some of the instruction pages I've found install using the standard
repositories and install version 9.2 (?) while some others add a postgresql
repo and install 9.5

What are people's opinions?

memory cgroup max_usage_in_bytes question

hi all,

can someone help explaining what we are seeing?

Re: [CentOS] GnuPG 2.0.16?

K> Does anyone know where I can find GnuPG 2.0.16 for CentOS 6.9 32-bit?

Do you want something that old? 2.0.17 came out in 2011. I run
Oracle Linux 6.9 (basically RHEL without the trademarks) -- if you're
comfortable building from source, GnuPG-2.2.5 wasn't hard.

What is the universal (world wide) understanding behind degaussing harddisks?

Good evening from Singapore!

The foremost question which I want to ask is, what is the universal
(world wide) understanding behind degaussing hard drives?

I work for No Secrets Agency (NSA) Pte Ltd (fictitious company name
used).

GnuPG 2.0.16?

Hello all --

Does anyone know where I can find GnuPG 2.0.16 for CentOS 6.9 32-bit?
I've already looked in the normal repos.

I have 2.0.14 now and my Enigmail addon has stopped working.

Thanks.

tftpd server S not responding

I have a tftpd server S running on centos 7 and managed by systemd

It is not respoding to A server which is sending the tftp read request RRQ.

I do see the RRQ packets coming from A to S, but S never responds back from
a different port Y to A

So this part is working fine

<a href="https://en.wikipedia.org/wiki/Trivial_File_Transfer_Protocol#/media/File:Tftp-rrq.svg" title="https://en.wikipedia.org/wiki/Trivial_File_Transfer_Protocol#/media/File:Tftp-rrq.svg">https://en.wikipedia.org/wiki/Trivial_File_Transfer_Protocol#/media/File...</a>

But I do not see any attempts to even send a data packet back in my packet
capture running on S

So this event is not occuring, as if my tftpd server is dead.

CentOS-announce Digest, Vol 157, Issue 7

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or, via email, send a message with subject or body 'help' to
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Today's Topics:

1. CEBA-2018:0597 CentOS 6 tzdata BugFix Update (Johnny Hughes)
2.

OT: Problems with NextCloud 13.0.1 under Centos7

Hi all,

I have a strange problem with a clean NextCloud 13.0.1 install under
CentOS 7 (fully patched): when I try to login with admin user immediately
after setup, returns to login page without returning any error.

An no errors in nginx or php log files ...

I am using the following components:

rh-php71
rh-mariadb102
nginx 1.12

Any idea?

Many thanks.

centos7: pptpd vpn problem: mppe_decompress[0]: FLUSHED bit not set in stateless mode!

I try to setup a PPTP VPN server on Centos 7 and from client a router
Vodafone Station (Firmware 5.4.8.1.316.1.21)
On c7 I have install this:
[root@s-virt tmp]# rpm -q pptpd ppppptpd-1.4.0-2.el7.x86_64ppp-2.4.5-
33.el7.x86_64
and setup all file and firewall like howto say.This now is my config:
/etc/pptpd.conf:option
/etc/ppp/options.pptpd/etc/pptpd.conf:logwtmp/etc/pptpd.conf:localip
192.168.11.1/etc/pptpd.conf:remoteip 192.168.11.100-
109/etc/ppp/options.pptpd:name pptpd/etc/ppp/options.pptpd:refuse-
pap/etc/ppp/options.pptpd:refuse-chap/etc/ppp/options.pptpd:refuse-
mschap/etc/ppp/options.p

How insecure is NIS ? Possible alternatives ?

Hi,

In the past I've setup simple centralized authentication with NIS and
NFS, without bothering about possible security implications.

Over the next month I have to setup a new network in a local school, and
I wonder if I should use NIS/NFS. I still have my own documentation,
it's simple and somewhat bone-headed to setup, and it just works.

RHEL/CentOS 7 still provide NIS, and I vaguely wonder how exactly it is
insecure. So I thought I'd simply ask on this list.

I know there's FreeIPA available.

How Can I ...

I've got a WD My Passport Ultra 1TB (USB) plugged into my router and I
have 4 Windows machines, all running Windows 7, and all 4 machines can
see the device as drive 'Y'. I use this device several ways, i.e. all my
Windows machines use the same Firefox bookmarks and cookies

I've got 5 machines running CentOS 6 x86_64 and I'd like to know what do
I have to do for them to 'see' that same 1TB device? Right now I use
winscp to get the data from CentOS and save it on the device via Windows.

exim PAM authentication: all users unknown

Hi,

how come that exim can not authenticate users using PAM?

======================

PLAIN:
driver = plaintext
server_set_id = $auth2
server_prompts = :
server_condition = ${if pam{$auth2:$auth3}{yes}{no}}
server_advertise_condition = ${if def:tls_cipher }
server_debug_print = "auth: $1 $2 $3"

======================

2969 SMTP<< AUTH PLAIN AGp2AGdsdWViaXJk
2969 PLAIN authenticator server_condition:
2969 $auth1 =
2969 $auth2 = user
2969 $auth3 = password
2969 $1 =
2969 $2 = user
2969 $3 = password

CentOS-announce Digest, Vol 157, Issue 6

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or, via email, send a message with subject or body 'help' to
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Today's Topics:

1.

CentOS-announce Digest, Vol 157, Issue 5

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<a href="mailto:centos- ... at centos dot org">centos- ... at centos dot org</a>

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or, via email, send a message with subject or body 'help' to
<a href="mailto:centos-announce- ... at centos dot org">centos-announce- ... at centos dot org</a>

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When replying, please edit your Subject line so it is more specific
than "Re: Contents of CentOS-announce digest..."

Today's Topics:

1.

Next major version of Firefox on RHEL/CentOS ?

I know CentOS don't have inside info on what Redhat may or may not do in
the future - plus Redhat don't usually announce publicly what their
future plans are - but on the off-chance that someone on this list may know:

Does anyone know what Redhat are likely to do with the next major
release of Firefox on RHEL (and hence CentOS) ?

The reason I ask, is that RHEL has been supplying the 'ESR' (Extended
Support Release) version of Firefox - which Mozilla supports for about a
year - and RHEL moves to each new ESR version before Mozilla drops
support for the previous version.

Up until the cu

Wi-Fi WPA Hacking Tool is Totally Useless on New Wireless Routers

Hi,

I am sharing my learning outcomes.

Recently I downloaded Kali Linux 64-bit Version 2018.1 and ran it on
my HP laptop with the integrated Intel Dual Band Wireless-AC 8260
Wireless Network Card.

I wanted to test if I could hack the Wi-Fi WPA password on Ruckus R700
Access Point (AP) and the Aztech DSL8900GR(AC) Wireless Router. So I
started using the Reaver WPA cracking tool.

I understand that the Reaver tool works because there is a bug with
Wi-Fi Protected Setup (WPS).

I have no luck with Reaver on the Ruckus R700 Access Point.

Upgrade Centos 6 to Centos 7 32 Bits i686 architecture.

Hi ,

I am running Centos 6 on an old Acer S2000 PC 1Mb memory and i686 32 bits
architecture.

Question : Is there a possibility to upgrade to Centos 7 32 bits ?

Regards ,

Ger van Dijck.

spectre variant 2

Hi all!

I'm running an up-to-date Centos-7 on an AMD Vishera 6300, 6 core CPU.

I note that when I run the redhat script to test for spectre & meltdown
I get this result for variant 2:

Variant #2 (Spectre): Vulnerable
CVE-2017-5715 - speculative execution branch target injection
- Kernel with mitigation patches: OK
- HW support / updated microcode: NO
- IBRS: Not disabled on kernel commandline
- IBPB: Not disabled on kernel commandline

and when I run the one from github I get this:

CVE-2017-5715 [branch target injection] aka 'Spectre Variant 2'
* Mitigated according to the /sy

Install CentOS 7 over serial port on router board ?

Hi,

I have to install CentOS 7 for a client, to act as cache & filtering
proxy using Squid.

I'd like to use this piece of specialized hardware :

<a href="http://store.calexium.com/fr/systeme-pre-assemble/869-systeme-pre-assemble-rackmatrix-apu-amd-gx-412tc-quatre-coeurs-1-ghz.html" title="http://store.calexium.com/fr/systeme-pre-assemble/869-systeme-pre-assemble-rackmatrix-apu-amd-gx-412tc-quatre-coeurs-1-ghz.html">http://store.calexium.com/fr/systeme-pre-assemble/869-systeme-pre-assemb...</a>

There is no VGA or HDMI video output, just a serial port to connect to,
and then three NICs and two USB ports.

I've never installed CentOS over a serial console, so I don't even know
if it's possible in the first place. Has anyone ever done something like
that ?

Any suggestions ?

Niki

cyrus: socket options

Hi,

what are the following messages supposed to tell me and does this
indicate a problem?

# systemctl status cyrus-imapd
[...]
master[3766]: unable to setsocketopt(IP_TOS): Operation not supported
master[3766]: unable to setsocketopt(IP_TOS): Operation not supported
[...]

Exim says it can not connect to the lmtp socket even when selinux
doesn´t get in the way.

CentOS-announce Digest, Vol 157, Issue 4

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<a href="mailto:centos- ... at centos dot org">centos- ... at centos dot org</a>

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or, via email, send a message with subject or body 'help' to
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than "Re: Contents of CentOS-announce digest..."

Today's Topics:

1.

selinux: how to allow access?

Hi,

how do I allow exim access to a socket in order to be able to do local
deliveries to cyrus?

type=AVC msg=audit(1521179280.845:1920270): avc: denied { name_connect
} for pid=319 comm="exim" dest=24 scontext=system_u:system_r:exim_t:s0
tcontext=system_u:object_r:lmtp_port_t:s0 tclass=tcp_socket

Yet again I could not find any documentation explaining how to do basic
things like this :( Selinux is more like a curse than anything else :(
Why is there not even a good documentation?

VirtualBox on CentOS 7 with bridged network not working

I've installed VirtualBox v5.2 on a CentOS 7.4 machine, but VMs set up
with bridged networking can not 'see' past the VirtualBox host machine

i.e.

xfs file system errors

How do I fix an xfs file system error ?

I searched and it says to run xfs_repair /dev/sda1 - did not work.
I got an error on boot and the machine dropped into service mode by
entering the PW. I entered the above command and it said couldnt load
library...

SO I rebooted, dropped into rescue mode. Again I entered the command above
and it said teh same thing.something about could not load library

What am I missing ? Thanks,

Jerry

Good work, Red Hat!

Delivered as per <a href="https://access.redhat.com/articles/3311301" title="https://access.redhat.com/articles/3311301">https://access.redhat.com/articles/3311301</a>. This is good news.

ISCSI target + LVM Problem

Hello,

I have a LVM with 2 ISCSI disk mounted. The partition started presents
problem such " i/o error". I unmounted the device, and restarted target
server in scsi, wich as having some problems. After that i mapped iscsi and
trying to mount partition again but:
When i run the pvdisplay i get the following erro:

read failed after 0 of 4096 at 0: Input/output error

And cannot mount partition.

Squid + SquidGuard : static block page not working

Hi,

I've been working with Squid + SquidGuard for a few years, though only
on Slackware.

Squid vs. iptables redirection: exception for certain domains ?

Hi,

I'm currently facing a quite tricky problem. Here goes.

I have setup Squid as a transparent HTTP+HTTPS proxy in my local
network. All web traffic gets handed over to Squid by an iptables script
on the server.

yum list "available" versus "updates", and centosplus versioning

quite possibly more a yum question than a centos question, but i'm a
bit confused about the difference between listing "available" packages
versus "updates" packages.

short example -- listing what the yum man page suggests should be
"available" for installation, restricting myself to centosplus:

$ yum list available --disablerepo=\* --enablerepo=centosplus
...

Upcoming Dojos: Bangalore, Singapore

I want to draw attention to two upcoming events.

First, we have the CentOS Bangalore Dojo. Details are still emerging,
but it will be held on March 21 at the Red Hat India office. Details are
<a href="https://www.meetup.com/CentOS-India/events/248566854/" title="https://www.meetup.com/CentOS-India/events/248566854/">https://www.meetup.com/CentOS-India/events/248566854/</a> and more details
will be coming very soon.

Then, on the following Sunday, March 25th, we'll be holding another Dojo
as part of the FOSSAsia event in Singapore, at the Lifelong Learning
Institute.

Issues with Mirror Sites

Hi,

Newbie question, is there a problem with the Centos 7 mirror sites, no matter what I do the mirror sites are reporting back the meta data in the repodata folder is wrong and I cant do a Yum Update? when I browse to a few of the mirror sites it looks to me that they sym links are broken?

I apologies in advance if I got this completely wrong as am still learning

Cheers in advance

Ken

SELinux breaks Squid's ssl_crtd helper

Hi,

I've setup a transparent HTTP+HTTPS proxy on my server running CentOS 7,
using Squid.

Memory Leak with PHP

I understand that this problem may have very little to do with CentOs, but it happens to occur on a CentOS webserver and maybe you’ll have a clue.

Since a few months, after many upgrades on several blogs (now running with PHP7), our server is eating up RAM no end. PHP processes swell to over 2 GB (each) and when the whole RAM and the whole swap are full, problems stack up and finally paralyze the system.

mate-terminal crash when using drag-n-drop tabs

We're using mate-terminal (1.16.3) from EPEL on CentOS 7.4 with the Mate
desktop, but mate-terminal crashes when we do the following:

Start mate-terminal, open a tab (File -> Open Tab) then with the left
mouse button drag a tab and drop it in the same terminal window - and
the terminal window crashes ...

I did a bit of Googling, and found this issue reported in earlier
releases of mate-terminal - which was fixed - but no mention of issues
with 1.16.x

However, if I rebuild and install the package from the mate-terminal
1.16.3 SRPM from EPEL, it doesn't crash ...

Which is rather bizarr

NIC naming conventions and vmware

I have a couple of CentOS 7 machines running in a vmware environment. On
all the older ones I've deployed, the NIC is named ens160, but on all of
the new ones, it is named ens192. I can't find any difference in the
hardware that would account for this.

Any suggestions on what I can do to figure out why some are named ens160
and some ens192?

Thanks.

An selinux issue

CentUS 7.4

From sealert:
SELinux is preventing /usr/sbin/sshd from read access on the file
/etc/ssh/moduli.

***** Plugin restorecon (94.8 confidence) suggests
************************

If you want to fix the label.
/etc/ssh/moduli default label should be etc_t.
Then you can run restorecon.
Do
# /sbin/restorecon -v /etc/ssh/moduli
<...>
Additional Information:
Source Context system_u:system_r:sshd_t:s0-s0:c0.c1023
Target Context system_u:object_r:unlabeled_t:s0
Target Objects /etc/ssh/moduli [ file ]
Source sshd
Source Pat

kpartx can not detach

kpartx -a /mnt/.../lvdisk.img

to map the partitions and mount them via

/dev/mapper/loop0pX

After using the disk (unmounting it) I noticed that
detaching such mapping via kpartx -d does not result
in freeing up the loop devices. Results: System reboots
shows that the filesystem where lvdisk.img is located
can't be unmounted.

lsof, fuser, ps does not show any usage. Even removing the
device node via

dmsetup remove /dev/mapper/loop0pX

does not help. Trying to unmount the underlying filesystem
still shows /mnt: device is busy.

Any other suggestions would be greatly appreciated!

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