Discuss

discuss@lists.centos.org

2 participants
34758 discussions

Question on server speed
by Jerry Geis 06 Aug '19

06 Aug '19

Hi all, I have a customer server with 32 cores, 128G ram i7960X. So nice box... Why is it that "all" I am really doing at the moment is copying things to an external SSD disk USB3 connected and the machine "freezes"... Why is that? clearly plenty of CPU RAM everything... I can see "blocking" to write data to the external disk - but there are 31 other cores and plenty of memory to make it "seem" as nothing is happening right now. Do I need to 'tweak' something to no see GUI freezes... Waiting on characters to show - even remoted in with SSH experiences the same thing - so its not just X. Thanks for any suggestions. Jerry

8 11

[OT] odd network question
by Fred Smith 06 Aug '19

06 Aug '19

I know this is OT, but I'm not sure where else to ask. I can hope for fogiveness! :) My home router sends its logs to the rsyslog on my desktop system, and from there I can learn all kinds of interesting (or disturbing) things. I've written a really horrid shellscript (about 20 things piped together with a temp file in the middle) to give me the count of DROP events for specific incoming ports. (The "Description" field is lifted verbatim from /etc/services.) Count Port Description ----- ---- ----------- 140750 48825 12251 23 telnet 23/tcp 10043 445 microsoft-ds 445/tcp 2869 1 tcpmux 1/tcp # TCP port service multiplexer 2478 9 discard 9/tcp sink null 2154 8080 webcache 8080/tcp http-alt # WWW caching service 1990 5060 sip 5060/tcp # SIP 1592 8089 1452 8545 1358 3389 ms-wbt-server 3389/tcp # MS WBT Server 1275 443 https 443/tcp # http protocol over TLS/SSL 1275 81 1258 5000 commplex-main 5000/tcp # 1244 80 http 80/tcp www www-http # WorldWideWeb HTTP 1022 8291 840 60001 834 7547 cwmp 7547/tcp # DSL Forum CWMP 821 1433 ms-sql-s 1433/tcp # Microsoft-SQL-Server 809 2323 3d-nfsd 2323/tcp # 3d-nfsd 764 5555 personal-agent 5555/tcp # Personal Agent This is just the first screen of it, there are many more. The data compiled here is for the last month (rsyslog is keeping the current log plus four older logs). I find it disturbing that there were 12251 attempts at telnet during that time, 2154 on 8080, and so forth. either I'm some kind of special/hot target, or else everybody gets this kind of crap and may not even know it. But the one thing I mean to ask about here is the very first item, 140,750 attempts at port 48825. What the heck is port 48825? I can't find any reference to anything that uses it online, but for some reason it is extremely popular, at least amongst the turkeys trying to break into my network! A little more grepping: grep 'DPT=48825' Firewall-Log* | grep -o "SRC=[09123456789.]*" | sort -u -t '.' -k "1.5g,1g" | less reveals that of all the source addresses trying to poke at 48825, there are 193 unique addresses. Either this indicates a heck of a lot of sites having at my firewall, or that some few sites are all spoofing their addresses. I can sort of understand people whaling away at ports that may conceal gold, from their warped point of view, but I haven't a clue why so many people would be beating on some apparently unassigned and unused port. Anyone got any clues? Thanks in advance! Fred -- ------------------------------------------------------------------------------- .---- Fred Smith / ( /__ ,__. __ __ / __ : / / / / /__) / / /__) .+' Home: fredex(a)fcshome.stoneham.ma.us / / (__ (___ (__(_ (___ / :__ 781-438-5471 -------------------------------- Jude 1:24,25 ---------------------------------

8 22

Peculiar process name in /proc
by John Horne 05 Aug '19

05 Aug '19

Hello, I was looking at a process through the '/proc' file system, and came across a process name which seemed to contain a hex value: lrwxrwxrwx. 1 xymon xymon 0 Aug 2 14:07 /proc/58032/exe -> /usr/sbin/xymond;5d44410e (deleted) I am aware of what the 'deleted' part means, but have no idea what the ';5d44410e' part means. Is this some sort of thread reference? The file '/usr/sbin/xymond' does exist and is running as a daemon. Anyone know what the ';5d44410e' is referring to? I have tried Googling about this, but found no mention of it. Thanks, John. -- John Horne | Senior Operations Analyst | Technology and Information Services University of Plymouth | Drake Circus | Plymouth | Devon | PL4 8AA | UK ________________________________ [http://www.plymouth.ac.uk/images/email_footer.gif]<http://www.plymouth.ac.uk/worldclass> This email and any files with it are confidential and intended solely for the use of the recipient to whom it is addressed. If you are not the intended recipient then copying, distribution or other use of the information contained is strictly prohibited and you should not rely on it. If you have received this email in error please let the sender know immediately and delete it from your system(s). Internet emails are not necessarily secure. While we take every care, University of Plymouth accepts no responsibility for viruses and it is your responsibility to scan emails and their attachments. University of Plymouth does not accept responsibility for any changes made after it was sent. Nothing in this email or its attachments constitutes an order for goods or services unless accompanied by an official order form.

3 4

gem install reel on Centos 7
by Jerry Geis 05 Aug '19

05 Aug '19

Hi - I installed ruby for something... The instructions said to also do the comand: gem install reel ERROR: Error installing reel: timers requires Ruby version >= 2.2.1. [root@devgeis ~]# ruby --version ruby 2.0.0p648 (2015-12-16) [x86_64-linux] Not sure what to do. Wait for Centos 8? Thoughts? Thanks, Jerry

2 4

Re: [CentOS] Strange apache problem
by Nikos Gatsis - Qbit 05 Aug '19

05 Aug '19

On 5/8/2019 1:20 μ.μ., Nikos Gatsis - Qbit wrote: > > On 3/8/2019 3:00 ΞΌ.ΞΌ., centos-request(a)centos.org wrote: >> On 8/2/2019 6:23 AM, Nikos Gatsis - Qbit wrote: >>> After update last centos packages, greek characters from sql request >>> look like question marks ????? >> Inspect the raw binary of the HTTP request. >> >> What browser is doing the rendering? > > After hours of tryingΒ to find out what happens, I found out that > updated freetds and after httpd update cause this problem. > I add client charset = ISO-8859-7 in freetds.conf and everything seems > to work fine. > I'm not sure if this is right, because all pages are in UTF8. But > adding this set to .conf dont work correct. > Is there someone familiar with freetds to explain me what the fuck is > this? > > Thank you an sorry for my language. > Nikos.

2 1

how to use an Adaptec RAID 51645
by Ralf Prengel 05 Aug '19

05 Aug '19

Hallo, has anyone a hint how to use an Adaptec RAID 51645 under Centos 7? A volume is created using the controller interface but isn't active under centos. Thanks for hintsts Ralf

2 2

nouveau problem
by John Chludzinski 03 Aug '19

03 Aug '19

When I attach an external monitor to my new Dell Precision I always get this and the monitor refuses to recognize video input. If I persist it reaches a point where the machine will boot but won't bring up a login prompt. I have to ssh to get in. And worst of all, it persisted after I remove the external monitor and am forced to re-install CentOS (7.6.1810). Aug 02 14:19:42 localhost.localdomain kernel: ------------[ cut here ]------------ Aug 02 14:19:42 localhost.localdomain kernel: WARNING: CPU: 5 PID: 4929 at drivers/gpu/drm/nouveau/nvkm/engine/disp/coregf119.c:181 gf119_disp_core_fini+0x107/0x160 [nouveau Aug 02 14:19:42 localhost.localdomain kernel: Device: nouveau timeout Aug 02 14:19:42 localhost.localdomain kernel: Modules linked in: tcp_lp ext4 mbcache jbd2 fuse xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 tun devlink ip6t_rpfilter ip Aug 02 14:19:42 localhost.localdomain kernel: irqbypass crc32_pclmul ghash_clmulni_intel aesni_intel lrw gf128mul snd_hda_intel glue_helper ablk_helper cryptd snd_hda_codec Aug 02 14:19:42 localhost.localdomain kernel: e1000e drm crct10dif_pclmul crct10dif_common libata crc32c_intel nvme serio_raw ptp rtsx_pci nvme_core pps_core drm_panel_orie Aug 02 14:19:42 localhost.localdomain kernel: CPU: 5 PID: 4929 Comm: kworker/5:0 Kdump: loaded Tainted: G W ------------ 3.10.0-957.27.2.el7.x86_64 #1 Aug 02 14:19:42 localhost.localdomain kernel: Hardware name: Dell Inc. Precision 7530/0425K7, BIOS 1.8.2 04/26/2019 Aug 02 14:19:42 localhost.localdomain kernel: Workqueue: pm pm_runtime_work Aug 02 14:19:42 localhost.localdomain kernel: Call Trace: Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffff94d64147>] dump_stack+0x19/0x1b Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffff94698848>] __warn+0xd8/0x100 Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffff946988cf>] warn_slowpath_fmt+0x5f/0x80 Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffffc0561637>] ? nv04_timer_read+0x57/0x70 [nouveau] Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffffc057b4c7>] gf119_disp_core_fini+0x107/0x160 [nouveau] Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffffc0579423>] nv50_disp_chan_fini+0x23/0x40 [nouveau] Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffffc04fc0bf>] nvkm_object_fini+0xdf/0x250 [nouveau] Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffffc04fc078>] nvkm_object_fini+0x98/0x250 [nouveau] Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffffc04fc078>] nvkm_object_fini+0x98/0x250 [nouveau] Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffffc04fc078>] nvkm_object_fini+0x98/0x250 [nouveau] Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffffc04fc078>] nvkm_object_fini+0x98/0x250 [nouveau] Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffffc05b97a3>] nvkm_client_suspend+0x13/0x20 [nouveau] Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffffc04f685a>] nvif_client_suspend+0x1a/0x20 [nouveau] Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffffc05b7437>] nouveau_do_suspend+0x147/0x2d0 [nouveau] Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffffc05b8317>] nouveau_pmops_runtime_suspend+0x47/0xa0 [nouveau] Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffff949c6622>] pci_pm_runtime_suspend+0x62/0x190 Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffff94ab4796>] __rpm_callback+0x36/0x80 Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffff94ab4804>] rpm_callback+0x24/0x80 Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffff94ab4981>] rpm_suspend+0x121/0x650 Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffff94ab5fea>] pm_runtime_work+0x8a/0xc0 Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffff946baf9f>] process_one_work+0x17f/0x440 Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffff946bc036>] worker_thread+0x126/0x3c0 Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffff946bbf10>] ? manage_workers.isra.25+0x2a0/0x2a0 Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffff946c2e81>] kthread+0xd1/0xe0 Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffff946c2db0>] ? insert_kthread_work+0x40/0x40 Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffff94d76c1d>] ret_from_fork_nospec_begin+0x7/0x21 Aug 02 14:19:42 localhost.localdomain kernel: [<ffffffff946c2db0>] ? insert_kthread_work+0x40/0x40 Aug 02 14:19:42 localhost.localdomain kernel: ---[ end trace 51db28c5c4c2e696 ]--- Aug 02 14:19:42 localhost.localdomain kernel: nouveau 0000:01:00.0: disp: core fini: 8f0d0088

2 1

Strange apache problem
by Nikos Gatsis - Qbit 02 Aug '19

02 Aug '19

Hello list. I have an local webserver running latest centos 7 release. The website is connected to mssql database on other windows server and worked fine since months until today. After update last centos packages, greek characters from sql request look like question marks ????? The config files are the same and the connection use utf8 set. Any ideas? Thank you for advance, Nikos.

2 1

virsh: howto convert storage type of VMs?
by hw 01 Aug '19

01 Aug '19

Hi, how can I convert the storage type of VMs from being stored in individual qcow2 files to being stored in a storage pool? The VMs may be shut down during the conversion.

2 2

Are those functions thread-safe, i.e. fprintf() and fflush()
by qw 01 Aug '19

01 Aug '19

Hi, I have one question: Are those functions thread-safe, i.e. fprintf() and fflush() ? Thanks! Regard Andrew

2 1

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

Discuss