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34729 discussions

rpm command option
by Chris Olson 06 May '20

06 May '20

We located an application recommended by one of customers for sharing certain data. It was available for installation using a few different methods. Using yum was also recommended for the installation. The install instructions began with what appeared to be a fairly typical command as indicated below (with the URL slightly altered). sudo rpm --import https://rpm.xxxxx.com/rpmrepo.key To our junior employee assigned to perform the install on a test system, it seemed like a good idea to do some checking on the rpm option --import indicated in those instructions. They did not find the --import in any of the 14 pages of the CentOS 7 man page for rpm. Some Google searches indicated that the --import option does exist. The repo setup and application installation all went well and took only about three minutes. The app is also working as intended. Is there some good reason for --import being left out of the manual page?

5 4

Custom ISO
by Jerry Geis 06 May '20

06 May '20

Hi All, I am trying to make a customer ISO. When I run this command: mkisofs -o $DESTINATION_FILE -b isolinux/isolinux.bin -c boot.cat \ -no-emul-boot -boot-info-table \ -V "$NAME" -boot-load-size 4 -boot-info-table -R -J -v -T \ -eltorito-alt-boot -e images/efiboot.img \ $DESTINATION_DIR it tells me: Size of boot image is 4 sectors -> No emulation Size of boot image is 17408 sectors -> genisoimage: Error - boot image 'images/efiboot.img' has not an allowable size. This is the exact same file that is on the Everything ISO image. What am I missing ? I also want to make the ISO boot with UEFI. I think I have the right parameters but getting this error. Thoughts? Thanks, Jerry

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Samba update to 4.10 (with c7.8) - broken -?
by lejeczek 05 May '20

05 May '20

hi guys I've just let the system to get big update to 7.8 and with it came new Samba(4.10.4-10.el7.x86_64), a version with now fails on my boxes for no apparent reasons. My Samba uses LDAP backend but I can see no errors related to that neither. ... [2020/05/05 15:53:37.093041, 0] ../../lib/util/become_daemon.c:136(daemon_ready) daemon_ready: daemon 'smbd' finished starting up and ready to serve connections [2020/05/05 15:53:37.106797, 2] ../../source3/smbd/server.c:1415(smbd_parent_loop) waiting for connections [2020/05/05 15:53:37.108770, 3] ../../source3/smbd/server_exit.c:236(exit_server_common) Server exit (termination signal) Failed to start Samba SMB Daemon. Unit smb-ccnr-biotec.service entered failed state. smb-ccnr-biotec.service failed. Are you seeing anything weir with your Sambas? many thanks, L.

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Understanding VDO vs ZFS
by david 04 May '20

04 May '20

Folks I'm looking for a solution for backups because ZFS has failed on me too many times. In my environment, I have a large amount of data (around 2tb) that I periodically back up. I keep the last 5 "snapshots". I use rsync so that when I overwrite the oldest backup, most of the data is already there and the backup completes quickly, because only a small number of files have actually changed. Because of this low change rate, I have used ZFS with its deduplication feature to store the data. I started using a Centos-6 installation, and upgraded years ago to Centos7. Centos 8 is on my agenda. However, I've had several data-loss events with ZFS where because of a combination of errors and/or mistakes, the entire store was lost. I've also noticed that ZFS is maintained separately from Centos. At this moment, the Centos 8 update causes ZFS to fail. Looking for an alternate, I'm trying VDO. In the VDO installation, I created a logical volume containing two hard-drives, and defined VDO on top of that logical volume. It appears to be running, yet I find the deduplication numbers don't pass the smell test. I would expect that if the logical volume contains three copies of essentially identical data, I should see deduplication numbers close to 3.00, but instead I'm seeing numbers like 1.15. I compute the compression number as follows: Use df and extract the value for "1k blocks used" from the third column use vdostats --verbose and extract the number titled "1K-blocks used" Divide the first by the second. Can you provide any advice on my use of ZFS or VDO without telling me that I should be doing backups differently? Thanks David

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perl Net::Interface module on CentOS 8
by sthustfo 04 May '20

04 May '20

We have received a perl program that makes use of "Net::Interface" module which I am trying to run on CentOS 8. However, running into issues as this module is not found. use Net::Interface; I could use cpan to install the same, but currently using the rpm packages for all the needs. Any idea which rpm package provides this perl module? Thanks.

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Re: [CentOS] Understanding VDO vs ZFS
by david 03 May '20

03 May '20

0At 08:07 PM 5/2/2020, you wrote: >My two cents: >1- Do you have an encrypted filesystem on top of VDO? If yes, you will see >no benefit from dedupe. >2- can you post the stats of vdostats verbose /dev/mapper/xxxxx (replace >with your device) > >you can do something like: "vdostats -verbose /dev/mapper/xxxxxxxx | grep >-B6 'save percentage' > > > > >On Sat, May 2, 2020 at 9:54 PM david <david(a)daku.org> wrote: > > > Folks > > > > I'm looking for a solution for backups because ZFS has failed on me > > too many times. In my environment, I have a large amount of data > > <snip> BTW: I think the 'saving percent' of 13 is consistent with my computation of 1.16 if one takes into account the overhead blocks. Is that true?

1 0

systemctl restart changes permission.
by Kaushal Shriyan 02 May '20

02 May '20

Hi, I am running CentOS Linux release 7.8.2003 (Core) with php72u-fpm-7.2.30-1.el7.ius.x86_64 version. I am facing the below permission denied issue. I also did the below steps #cd /run #chown -Rc nginx.nginx php-fpm changed ownership of ‘php-fpm/php-fpm.pid’ from root:root to nginx:nginx changed ownership of ‘php-fpm’ from root:root to nginx:nginx #systemctl restart php-fpm again changes it from nginx.nginx to root.root user. nginx error logs > 2020/04/30 03:09:28 [crit] 17175#0: *154570 connect() to > unix:/run/php-fpm/www.sock failed (13: *Permission denied*) while > connecting to upstream, client: 49.207.54.161, server: _, request: "GET / > HTTP/1.1", upstream: "fastcgi://unix:/run/php-fpm/www.sock:", host: > "35.128.212.112" > 2020/04/30 03:09:28 [error] 17175#0: *154570 open() > "/var/www/drupal/web/50x.html" failed (2: No such file or directory), > client: 49.207.54.161, server: _, request: "GET / HTTP/1.1", upstream: > "fastcgi://unix:/run/php-fpm/www.sock", host: "35.128.212.112" > 2020/04/30 03:09:35 [crit] 17176#0: *154573 connect() to > unix:/run/php-fpm/www.sock failed (13: Permission denied) while connecting > to upstream, client: 49.207.54.161, server: _, request: "GET / HTTP/1.1", > upstream: "fastcgi://unix:/run/php-fpm/www.sock:", host: "35.128.212.112" > 2020/04/30 03:09:35 [error] 17176#0: *154573 open() > "/var/www/drupal/web/50x.html" failed (2: No such file or directory), > client: 49.207.54.161, server: _, request: "GET / HTTP/1.1", upstream: > "fastcgi://unix:/run/php-fpm/www.sock", host: "35.128.212.112" > 2020/04/30 03:09:49 [crit] 17175#0: *154575 connect() to > unix:/run/php-fpm/www.sock failed (13: Permission denied) while connecting > to upstream, client: 14.98.153.6, server: _, request: "GET / HTTP/1.1", > upstream: "fastcgi://unix:/run/php-fpm/www.sock:", host: "35.128.212.112" > 2020/04/30 03:09:49 [error] 17175#0: *154575 open() > "/var/www/drupal/web/50x.html" failed (2: No such file or directory), > client: 14.98.153.6, server: _, request: "GET / HTTP/1.1", upstream: > "fastcgi://unix:/run/php-fpm/www.sock", host: "35.128.212.112" > 2020/04/30 03:09:50 [crit] 17175#0: *154575 connect() to > unix:/run/php-fpm/www.sock failed (13: Permission denied) while connecting > to upstream, client: 14.98.153.6, server: _, request: "GET / HTTP/1.1", > upstream: "fastcgi://unix:/run/php-fpm/www.sock:", host: "35.128.212.112" > 2020/04/30 03:09:50 [error] 17175#0: *154575 open() > "/var/www/drupal/web/50x.html" failed (2: No such file or directory), > client: 14.98.153.6, server: _, request: "GET / HTTP/1.1", upstream: > "fastcgi://unix:/run/php-fpm/www.sock", host: "35.128.212.112" > 2020/04/30 03:10:46 [crit] 17176#0: *154578 connect() to > unix:/run/php-fpm/www.sock failed (13: Permission denied) while connecting > to upstream, client: 184.22.107.148, server: _, request: "GET / HTTP/1.1", > upstream: "fastcgi://unix:/run/php-fpm/www.sock:", host: "35.128.212.112" > 2020/04/30 03:10:46 [error] 17176#0: *154578 open() > "/var/www/drupal/web/50x.html" failed (2: No such file or directory), > client: 184.22.107.148, server: _, request: "GET / HTTP/1.1", upstream: > "fastcgi://unix:/run/php-fpm/www.sock", host: "35.128.212.112" Please let me know if you need any additional information. Thanks in Advance. Best Regards, Kaushal

2 2

fcitx and switching between keyboards
by H 02 May '20

02 May '20

This is an old issue for me running CentOS 7, latest update. I am using fcitx to switch between keyboards, two western ones and Chinese pinyin keyboard. Ever since I installed CentOS 7 over two years ago, I have been unable to resolve issues where I can maintain keyboard setting within one application, notably chromium, and/or between applications. fcitx has a setting for allowing the keyboard choice to remain across applications but it does not work - so far. Further, in chromium, even when within an IME, every time I hit ENTER, the keyboard resets back to the default (EN_US). Needless to say, this makes for some very tedious typing using an alternative keyboard. I do not have this problem remaining within a single IME in Thunderbird, nor in Firefox, nor in LibreOffice. I can switch back and forth between one of these apps and the keyboard switches back to what I last used in that app when switching back to the app - /provided I have used Chinese/. It does not work when I use different western keyboards in the various apps. Is anyone using fcitx switching between different keyboards and can confirm the above - or refute it?

1 0

dhcpd: Not searching LDAP
by Frank Cox 02 May '20

02 May '20

Whenever my dhcp server is restarted it always puts this entry into /var/log/messages: dhcpd: Not searching LDAP since ldap-server, ldap-port and ldap-base-dn were not specified in the config file This isn't earth-shattering news since I don't have a ldap server and there's no mention of ldap in /etc/dhcp/dhcpd.conf either. So is this an error message? If it's just an informational message then that's one thing, but if it's an error message then what's the problem that it's telling me about and how do I solve it? -- MELVILLE THEATRE ~ Real D 3D Digital Cinema ~ www.melvilletheatre.com

2 1

GNS3 installation docs for CentOS 8
by System Administrator 01 May '20

01 May '20

Hi, Does anyone have GNS3 installation guide for CentOS 8? Would be grateful if you could give me. Thank you. Sonam ****************************************************************************************************************************** Information contained in this message maybe confidential in nature and is meant for the intended recipient(s) of the message only. Tashi InfoComm Limited has the sole right to such information and any copying/redistribution of the information contained in the message, without the prior written consent of Tashi InfoComm Limited, is Prohibited. ******************************************************************************************************************************

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