Discuss May 2017

discuss@lists.centos.org

112 participants
94 discussions

27 Oct '17

I am a bit of a noob with Linux and Centos but would like to be able to access an old external USB disk formatted JFS by OS/2. I have seen there is a kmod-jfs package on elrepo that ought to work with Centos 6 but am unsure how to install kmods without hosing my existing system... If anyone would like to be so kind to give me a short how-to, I would be very grateful. Thank you.

4 13

system slowdown
by Larry Martell 13 Sep '17

13 Sep '17

I have a CentOS 6 system that has suddenly starting significantly slowing down. It runs a django app with an Apache server and MySQL server. There is plenty of disk space and no process seems to be hogging the memory or CPU. But operations that used to take 5 minutes are now taking hours and hours. Coinciding with this slow down I see these messages in /var/log/messages (this is hand typed, as I can't copy/paste or send email from this system, although for a change I do have remote access via 2 VPN hops): kernel: BUG: soft lockup - CPU#5 stuck for 67s! [khungtaskd] kernel: BUG: soft lockup - CPU#7 stuck for 67s! [khugepaged] These messages started appearing today around 7 AM, which is when users started reporting the slowdown. They are still occurring periodically and the system is still slow. Are these messages caused by the slowdown or are they the reason for it? Are they useful in tracking down the problem?

2 3

Simple OCSP server ??
by Alice Wonder 05 Sep '17

05 Sep '17

Hello list, I'm contemplating running my own CA to implement the new proposed ISP for validation of S/MIME certificates via DANE. I already use self-signed for my MX servers (with 3 1 1 dane records on TCP port 25) but I don't want to use self-signed for S/MIME for user specific x.509 certs because A) That's potentially a lot of DNS records B) That requires a hash of the e-mail addresses in DNS Instead, I will be using a wildcard in DNS with an intermediary that signs the user x.509 certificates. Using an intermediary to sign their certificates though means I can't just revoke their certificates by removing the DNS certificate, I'll need to provide an OCSP server for when one of their private keys gets compromised. I found https://access.redhat.com/documentation/en-US/Red_Hat_Certificate_System/8.… but it looks like that is intended for enterprise, more complex than I need. Anyone know of a good simple script for providing OCSP ?? -=- Not relevant to question but just important for me to note, I will *not* be asking people to install my root certificate in their e-mail clients. I think it is a bad practice to get users in the habit of installing root certificates. I think the PKI system has way way way to many root certificates as it is. I want a world where DANE validates most certificates, and only a few root certificates are needed for things like banks where EV certificates are a must. DANE as a way to validate S/MIME I think will be a godsend to e-mail security, I hope clients implement it.

2 5

ipa rpm conflicts
by lejeczek 04 Aug '17

04 Aug '17

does anybody see this: unning transaction Warning: RPMDB altered outside of yum. ** Found 8 pre-existing rpmdb problem(s), 'yum check' output follows: ipa-admintools-4.4.0-14.el7.centos.noarch has installed conflicts freeipa-admintools: ipa-admintools-4.4.0-14.el7.centos.noarch ipa-client-4.4.0-14.el7.centos.x86_64 has installed conflicts freeipa-client: ipa-client-4.4.0-14.el7.centos.x86_64 ipa-client-common-4.4.0-14.el7.centos.noarch has installed conflicts freeipa-client-common: ipa-client-common-4.4.0-14.el7.centos.noarch ipa-common-4.4.0-14.el7.centos.noarch has installed conflicts freeipa-common: ipa-common-4.4.0-14.el7.centos.noarch ipa-python-compat-4.4.0-14.el7.centos.noarch has installed conflicts freeipa-python-compat: ipa-python-compat-4.4.0-14.el7.centos.noarch ipa-server-4.4.0-14.el7.centos.x86_64 has installed conflicts freeipa-server: ipa-server-4.4.0-14.el7.centos.x86_64 ipa-server-common-4.4.0-14.el7.centos.noarch has installed conflicts freeipa-server-common: ipa-server-common-4.4.0-14.el7.centos.noarch ipa-server-dns-4.4.0-14.el7.centos.noarch has installed conflicts freeipa-server-dns: ipa-server-dns-4.4.0-14.el7.centos.noarch this in .rpm I guess and started appearing after upg to 7.3. *freeipa* is naming convention Fedora uses, right? Some remnants rebase did not take care of? regards, L.

4 3

Installing support for Chinese text in Centos 7
by H 18 Jul '17

18 Jul '17

I have just done a minimal installation of Centos7 followed by X Windows and the Mate desktop on a workstation. Although the default language is English, I would like to be able to write Chinese text in various applications. I seem to remember this was very easy to do in Centos 6 and Gnome: possibly only requiring only a simple 'yum groupinstall "Chinese Support"' after which I could use iBus to switch between languages. This does not seem to work in Centos 7. Suggestions? Thank you.

4 14

GPX files
by J Martin Rushton 19 Jun '17

19 Jun '17

I have a Garmin 78s marine GPS receiver and it stores tracks in GPX format. This is an XML encoded set of points giving longitude, latitude, time and sea depth. Garmin support viewing this via their Garmin Express product, but there only seem to be Windows and Mac versions. I've emailed them and await a reply. In the mean time, does anyone know of any Linux products that will emable me to view track data on a decent sized screen? I don't want to re-invent the wheel by coding up a hack myself. Thanks, Martin

9 9

more recent perl version?
by hw 06 Jun '17

06 Jun '17

Hi, are there packages replacing the ancient perl version in Centos 7 with a more recent one, like 5.24? At least the state feature is required.

13 34

CentOS 6.9, shredding a RAID
by m.roth＠5-cent.us 02 Jun '17

02 Jun '17

I've got an old RAID that I attached to a box. LSI card, and the RAID has 12 drives, for a total RAID size of 9.1TB, I think. I started shred /dev/sda the Friday before last... and it's still running. Is this reasonable for it to be taking this long...? mark

6 12

Disable Top Left Hot Corner
by Raymundo N.F. 01 Jun '17

01 Jun '17

Hello everybody. I have CentOS Linux release 7.3.1611 (Core ) instaled in mi PC. I want to disable *Top Left Hot Corner* function from my OS, but i don´t want to install the gnome-shell extension nohotcorners. I want to disable permanently, i want to diseable from the OS with a sentences from the command line. It is Possible?, i hope so. Thanks :D

4 23

Re: [CentOS] GPX files
by J Martin Rushton 31 May '17

31 May '17

Thanks for the suggestions. I'd seen gpsbabel, but simply converting the tracks doesn't appear to display them. Another user suggested a downloadable Google Earth, so I'll try that. Failing all else, I've used shell scripting in my day job for the last 18 years (and before that Digital's DCL for the previous 18 years). I'm just trying to avoid reinventing the wheel. Once again, thanks all for the suggestions. On 31/05/17 13:17, Michael Tiernan wrote: > On 5/30/17 7:02 PM, J Martin Rushton wrote: >> Garmin support viewing this via their >> Garmin Express product, > I know this isn't really appropriate to this mailing list but I'll > perpetuate the conversation just this little bit more. > > You need to look at the likes of gpsbabel (http://www.gpsbabel.org/), > and websites like poi-factory (http://www.poi-factory.com/) to chase > this sort of problem. > > I've found very few openly Linux solutions but I've also gotten to the > point that "viewing" the files is less needed than before. I do a lot of > shell based work. One learns to adapt. :( >

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Discuss May 2017