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34758 discussions

inquiry about limitation of file system
by yf chu 04 Nov '18

04 Nov '18

I have a website with millions of pages. We often deploy our websites on centos with Nginx and Apache Http Server as HTTP Web Server. I am very worried about the performance of web server if the amount of pages is very very large. I wonder whether the performance will be affected if there are too many files and directories on the server. Besides, our bugdet is limited. We do not want to deploy too many Servers and use other file system such as GFS. So I want to know the limitation of centos file system and how should I handle this issue.

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fingerprint reader on C-7 ???
by Fred Smith 03 Nov '18

03 Nov '18

Hi all! I just got a new (to me) used laptop (HP EliteBook 8530p) and find that it has a fingerprint reader. Wondering if it could be made to work for me (Centos-7) I did a lot of googling (well, actually duck-duck-go-ing) and found a ton of hits on either setting it up in Windoze, or others wondering if it can be used in Linux. Some info on setting it up in Ubuntu, and a couple of pages on setting it up in Fedora, pages that were ten years old, or so. Found an academic paper on a group that wrote portable tools in Java that allegedly enable it in a cross-platfor manner, but not the software itself. Does anyone here have any better information on if it is possible, and if so, how? thanks in advance! Fred -- ---- Fred Smith -- fredex(a)fcshome.stoneham.ma.us ----------------------------- The eyes of the Lord are everywhere, keeping watch on the wicked and the good. ----------------------------- Proverbs 15:3 (niv) -----------------------------

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PostgreSQL port accessible even though it should be blocked by firewall
by Frank Thommen 01 Nov '18

01 Nov '18

Hi, this puzzles me: On one of our developer workstations, all ports with the exception of SSH are closed: $ firewall-cmd --list-all public (active) target: default icmp-block-inversion: no interfaces: eno1 sources: services: ssh dhcpv6-client ports: 22/tcp protocols: masquerade: no forward-ports: source-ports: icmp-blocks: rich rules: $ but still port 5432/tcp (PostgreSQL) is open: $ nmap -P0 devel-host Starting Nmap 6.40 ( http://nmap.org ) at 2018-10-29 19:46 CET Nmap scan report for devel-host (xxx.xxx.xxx.xxx) Host is up (0.94s latency). rDNS record for xxx.xxx.xxx.xxx: devel-host.our.domain Not shown: 998 filtered ports PORT STATE SERVICE 22/tcp open ssh 5432/tcp open postgresql Nmap done: 1 IP address (1 host up) scanned in 57.26 seconds $ PostgreSQL is running in a docker container: $ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 6f11fc41d2f0 postgres "docker-entrypoint..." 4 days ago Up 4 days 0.0.0.0:5432->5432/tcp postgres $ The various docker interfaces and virtual bridges are not assigned to any specific zone. Why is port 5432/tcp open? frank

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netinstall problem -- corrupt alsa-utils-1.1.0-10.el6.i686.rpm?
by Alain.Cochard＠unistra.fr 31 Oct '18

31 Oct '18

Hello. I try to install from the netinstall iso file. Everything works as I expect up to the screen where I have to choose between "Desktop", "Minimal Desktop", "Minimal", etc. If I choose either "Desktop" or "Minimal Desktop", I have a pop up saying "Installation Starting" with "Starting installation process", and, about a few seconds afterward, an "Error" pop up that says: The file alsa-utils-1.1.0-10.el6.i686.rpm cannot be opened. This is due to a missing file, a corrupt package or corrupt media. Please verify your installation source. If I choose "Minimal", this is the same except that instead of the alsa*.rpm, it is iputils-20071127-24.el6.i386.rpm. I have successfully used this installation procedure in the past, literally tens times (last time in January). Since it says "verify your installation source", I have now tried again with CentOS-6.10-i386-netinstall.iso CentOS-6.9-i386-netinstall.iso on two different USB sticks, written with unetbootin and livecd-iso-to-disk on two different computers. I also have a DVD with some former CentOS version (perhaps 6.4). I have tried the installation on 3 different computers (on one of which the procedure worked in the past). Every time it is the same. NB: during the installation process, the URL I enter is http://mirror.centos.org/centos/6/os/i386/ Any "chance" there is a problem on the CentOS side? Otherwise, what could I be doing wrong now? Thank you very much. Regards, Alain Cochard -- EOST (École et Observatoire des Sciences de la Terre) IPG (Institut de Physique du Globe) | alain.cochard(a)unistra.fr 5 rue René Descartes [bureau 106] | Phone: +33 (0)3 68 85 50 44 F-67084 Strasbourg Cedex, France | Fax: +33 (0)3 68 85 01 25

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Would RHEL, CentOS, and Fedora Remain Open Source/Free Software After IBM Buys Red Hat for $34 Billion?
by Turritopsis Dohrnii Teo En Ming 31 Oct '18

31 Oct '18

Good morning from Singapore, This is of paramount importance. Would Red Hat Enterprise Linux (RHEL), CentOS, and Fedora remain open source/free software after IBM buys Red Hat for $34 Billion? ===BEGIN SIGNATURE=== Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 30 Oct 2017 [1] https://tdtemcerts.wordpress.com/ [2] http://tdtemcerts.blogspot.sg/ [3] https://www.scribd.com/user/270125049/Teo-En-Ming ===END SIGNATURE===

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IBM buying RedHat
by Larry Martell 31 Oct '18

31 Oct '18

https://www.cnbc.com/2018/10/28/ibm-is-reportedly-nearing-deal-to-acquire-r…

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kiwi-ltsp - slave printer setup
by Michel Donais 31 Oct '18

31 Oct '18

On a Suse server I'm trying to setup an USB slave printer to a work station here below are my configuration files. When I boot a station, i can see on the lower right the identification of the station as localhost(192.168.0.101) +time stamp The printer is configured in cups as ipp://192.168.0.101:9100 my problem is when I send a print out the print stays on cups and stall. the print system doesn't find the station On a terminal I can Identify the printer with 'lsusb' On an Ubuntu system with the same configuration as below I can send a print and the printer receive it (it's working) On the Ubuntu station on the lower right, the station is identified as ws101(192.168.0.101) + the time stamp Where do I am wrong on the Suse server --------------------------------------------------------------------------------- *dhcpd.conf* option domain-name "Donais.ca"; option domain-name-servers 8.8.8.8, 8.8.4.4; option routers 192.168.0.1; option broadcast-address192.168.0.255; default-lease-time 14400; ddns-update-style interim; use-host-decl-nameson; subnet 192.168.0.0 netmask 255.255.255.0 { option tftp-server-name "192.168.0.1"; option bootfile-name "/pxelinux.0"; default-lease-time 14400; max-lease-time 172800; range dynamic-bootp 192.168.0.2 192.168.0.253; next-server 192.168.0.1; host ws101 { hardware ethernet F0:4D:A2:ED:35:D0; fixed-address 192.168.0.101; option host-name "ws101"; } host ws114 { hardware ethernet 84:2B:2B:89:6C:E0; fixed-address 192.168.0.114; } } -------------------------------------------------------------------------------- */etc/hosts* # # hosts This file describes a number of hostname-to-address # mappings for the TCP/IP subsystem. It is mostly # used at boot time, when no name servers are running. # On small systems, this file can be used instead of a # "named" name server. # Syntax: # # IP-Address Full-Qualified-Hostname Short-Hostname # 127.0.0.1 localhost # special IPv6 addresses ::1 localhost ipv6-localhost ipv6-loopback fe00::0 ipv6-localnet ff00::0 ipv6-mcastprefix ff02::1 ipv6-allnodes ff02::2 ipv6-allrouters ff02::3 ipv6-allhosts 192.168.0.1 suse.localhost suse 192.168.0.101ws101 192.168.0.102ws102 192.168.0.103ws103 192.168.0.104ws104 192.168.0.105ws105 192.168.0.114ws114.donais.ca ws114 ----------------------------------------------------------------------------- */srv/root-i386.17.12.19-20.25/etc/lts.conf* # This is the default lts.conf file for ltsp 5. # For more information about valid options please see: # man lts.conf [default] LDM_SERVER = 192.168.0.1 DNS_SERVER = 8.8.8.8 SOUND = True LOCALDEV = True SERVER = 192.168.0.1 SCREEN_07 = ldm LOCAL_APPS = true LTSP_FATCLIENT = false LDM_PASSWORD_HASH = true ENCRYPT_SWAP = false XRANDR_DISABLE = True X_MODE_0 = 1024.x768 X_MODE_1 = 1280x1024 X_MODE_2 = 1440x900 # [ws101] MODULE_01= usb-uhci MODULE_02= printer PRINTER_0_TYPE = U PRINTER_0-_DEVICE = /dev/usb/lp0 #PRINTER_0_PORT = 9100‎ ----------------------------------------------------------------------------- Michel Donais

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RHEL 7.6 released
by Yan Li 31 Oct '18

31 Oct '18

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/ht… They silently rebased GNOME to 3.28, which wasn't in the 7.6 beta nor in the release notes. Can't wait to see it on my desktop. Too bad we still have to wait for 3.29, which has more fixes for the huge memory leak of gnome-shell. -- Yan Li

7 9

Testing
by Turritopsis Dohrnii Teo En Ming 31 Oct '18

31 Oct '18

Please ignore. ===BEGIN SIGNATURE=== Turritopsis Dohrnii Teo En Ming's Academic Qualifications as at 30 Oct 2017 [1] https://tdtemcerts.wordpress.com/ <https://tdtemcerts.wordpress.com/>[2] http://tdtemcerts.blogspot.sg/ <http://tdtemcerts.blogspot.sg/>[3] https://www.scribd.com/user/270125049/Teo-En-Ming <https://www.scribd.com/user/270125049/Teo-En-Ming>===END SIGNATURE===

1 0

Address Codes
by Chris Olson 30 Oct '18

30 Oct '18

One of our summer interns has stayed on during the school year to work some weekends on special assignments. This past weekend, her assignment was to draft, and try out, procedures for scanning all incoming regular mail including the envelopes. This is a new effort for us because previous mail handling was done by another organization. Most of our incoming mail is from other businesses that create printed address labels. Many of these labels also have a type of bar code below the address. Is there a Linux utility or standard application that will read and translate these codes. Thanks.

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