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centos 6.5 input lag
by Matt Garman 14 Oct '14

14 Oct '14

I have a CentOS 6.5 x86_64 system that's been running problem-free for quite a while. Recently, it's locked-up hard several times. It's a headless server, but I do have IP KVM. However, when it's locked up, all I can see are a few lines of kernel stack trace. No hints to the problem in the system logs. I even enabled remote logging of syslog, hoping to catch the errors that way. No luck. I ran memtest86+ for about 36 errors, no problems. I've tried to strip away just about all running services. It's just a home file server. I haven't had a crash in a while, but I also haven't had it running very long. But even while it's up, I have severe input lag in the shell. I'll type a few characters, and two to 10 or so seconds pass before anything echoes to the screen. I've checked top, practically zero CPU load. It's not swapping - 16 GB of RAM, 0 swap used. Most memory heavy process is java (for CrashPlan backups). iostat shows 0% disk utilization. Anyone seen anything like this? Where else can I check to try to determine the source of this lag (which I suspect might be related to the recent crashes)? Thanks, Matt

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答复: turn bootable USB into bootable iso image
by 沈焕标 14 Oct '14

14 Oct '14

ctrl-d to settings，than you can see the CDROM, choose to use the ISO image file. Sent from my Windows Phone ________________________________ 发件人: Steve Clark<mailto:sclark@netwolves.com> 发送时间: ‎2014/‎10/‎10 21:42 收件人: CentOS mailing list<mailto:centos@centos.org> 主题: [CentOS] turn bootable USB into bootable iso image Hello List I have a Bootable USB stick that we use to Boot our servers and then install CentOS, PostgreSQL and our SW thru a Kickstart script. It works like a charm but now we are thinking of going Virtual and prepping Virtual CentOS servers under VMware ESXi. However, to have the same "Boot and Install" functionality I see no other solution than Booting a VMware machine from an ISO. So, what I would like to do is to take the Bootable USB and make it into an ISO. Any ideas? Thanks, -- Stephen Clark _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

4 3

machine check exception
by Shital Sakhare 14 Oct '14

14 Oct '14

Hello, Today, I got the below error server Console, Cpu 1:machine check exception Tcs c7f3d370acf17a ADDR 112d6c00040288 MISC c453176c00040200 This is not a softeware problem Run through mcelog ascii to decode and contact your hW vendor Kernel panic not syncing :machine check Can anybody please provide the meaning of this. How can I pull the logs from server ? Still not able to understand the exact cause of it. Please help. Thanks and Regards, Shital

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CentOS-announce Digest, Vol 116, Issue 7
by centos-announce-request＠centos.org 14 Oct '14

14 Oct '14

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2014:1255 Moderate CentOS 5 krb5 Security Update (Johnny Hughes) 2. CEBA-2014:1395 CentOS 6 ksh BugFix Update (Johnny Hughes) 3. CEEA-2014:1393 CentOS 6 be2iscsi Enhancement Update (Johnny Hughes) 4. CESA-2014:1397 Important CentOS 7 rsyslog Security Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Fri, 10 Oct 2014 21:45:06 +0000 From: Johnny Hughes <johnny(a)centos.org> To: centos-announce(a)centos.org Subject: [CentOS-announce] CESA-2014:1255 Moderate CentOS 5 krb5 Security Update Message-ID: <20141010214506.GA15074(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2014:1255 Moderate Upstream details at : https://rhn.redhat.com/errata/RHSA-2014-1255.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: bdedf72c20131241fe22c3377a2687514bc15a1b0c8cfa0b2437d5c95ddca9f7 krb5-devel-1.6.1-80.el5_11.i386.rpm 9fffda97beadefb7c10e1db2aaf1d78e6d868a1b8fc72b2b0d985deb4b1eb0f3 krb5-libs-1.6.1-80.el5_11.i386.rpm 33edfc1b5fec4efceffc6d31eb5b049c9f325ea2e2ec5899bf72bdae8b528e32 krb5-server-1.6.1-80.el5_11.i386.rpm 92d20a98d3f3f7688b960edc2fbaec43991761dbebbd7e7a2c52ba79ba2f8a49 krb5-server-ldap-1.6.1-80.el5_11.i386.rpm b43c346face17ce142faf5be78ec3af611a9a946321720e24ef5e6b8b6d40683 krb5-workstation-1.6.1-80.el5_11.i386.rpm x86_64: bdedf72c20131241fe22c3377a2687514bc15a1b0c8cfa0b2437d5c95ddca9f7 krb5-devel-1.6.1-80.el5_11.i386.rpm 8299528ca4f6fb42a2d0eb2cf0e40d31c090af54344bc61c731bd123d0ff58d2 krb5-devel-1.6.1-80.el5_11.x86_64.rpm 9fffda97beadefb7c10e1db2aaf1d78e6d868a1b8fc72b2b0d985deb4b1eb0f3 krb5-libs-1.6.1-80.el5_11.i386.rpm fc2d06194339c7a5e1f860a4054ac4e1c18ea224464357c76a5265c5bf3af1e4 krb5-libs-1.6.1-80.el5_11.x86_64.rpm e89f87c8ad03fcdf36373d4f7bb1162abc7c551b9ed1de95721042ac2dc6dc39 krb5-server-1.6.1-80.el5_11.x86_64.rpm a868a052676af36fde1b3523696977459d012cfabe1cd5458b3b49fc7de668bd krb5-server-ldap-1.6.1-80.el5_11.x86_64.rpm 7126bc94f693ccdda6da0242d67ce2850492187155a921c3fe9892e40136f017 krb5-workstation-1.6.1-80.el5_11.x86_64.rpm Source: 1804a362842e1d343d6ec9805831cd475eee88236087d5078c2b8f85477a5f8b krb5-1.6.1-80.el5_11.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 2 Date: Mon, 13 Oct 2014 13:15:14 +0000 From: Johnny Hughes <johnny(a)centos.org> To: centos-announce(a)centos.org Subject: [CentOS-announce] CEBA-2014:1395 CentOS 6 ksh BugFix Update Message-ID: <20141013131514.GA52198(a)n04.lon1.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2014:1395 Upstream details at : https://rhn.redhat.com/errata/RHBA-2014-1395.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 1387ed663fe471b6b1b4c7ace450886b76d8513ca399fa407f91125cf5b6c765 ksh-20120801-10.el6_5.12.i686.rpm x86_64: 1376e7817bab4dd5b14a4bd2ec56e973d05fbc6367350ceb110a5e39163a7be9 ksh-20120801-10.el6_5.12.x86_64.rpm Source: 7c1fe6ed97a97af63f4810947c747fd9ec6017ba9dcd7104b6d0c9fe007833fc ksh-20120801-10.el6_5.12.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 3 Date: Mon, 13 Oct 2014 13:15:27 +0000 From: Johnny Hughes <johnny(a)centos.org> To: centos-announce(a)centos.org Subject: [CentOS-announce] CEEA-2014:1393 CentOS 6 be2iscsi Enhancement Update Message-ID: <20141013131527.GA52284(a)n04.lon1.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Enhancement Advisory 2014:1393 Upstream details at : https://rhn.redhat.com/errata/RHEA-2014-1393.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: d0d7eaa262746e1760fd3d533b9fa82684ef87bb344b38422946f6b1b81c69c1 kmod-be2iscsi-10.2.273.0r-1.el6_5.i686.rpm x86_64: c066e98a14fc3db9b8237d19d3ffef9a62bcb8e063d6f996b166040f2a047bd2 kmod-be2iscsi-10.2.273.0r-1.el6_5.x86_64.rpm Source: 6d708190df4651c157dd173748290b83bb624071c37e0602540e04a72696d085 be2iscsi-10.2.273.0r-1.el6_5.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 4 Date: Mon, 13 Oct 2014 19:45:27 +0000 From: Johnny Hughes <johnny(a)centos.org> To: centos-announce(a)centos.org Subject: [CentOS-announce] CESA-2014:1397 Important CentOS 7 rsyslog Security Update Message-ID: <20141013194527.GA15291(a)n04.lon1.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2014:1397 Important Upstream details at : https://rhn.redhat.com/errata/RHSA-2014-1397.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) x86_64: 948575ad1feeb02cbe239668584e1b84268e3bec81215d02d5d06cea0b8f533c rsyslog-7.4.7-7.el7_0.x86_64.rpm c7e99647faec3af85a3d174a7aeac248a1d8d2c80410b6676049fe221188265a rsyslog-crypto-7.4.7-7.el7_0.x86_64.rpm 66be2ec9a2b8d0fa79960c38866ef7562ac59cde6717853eac0e140e320ffba0 rsyslog-doc-7.4.7-7.el7_0.x86_64.rpm 9a74dfc032f6946fa9bca1a8c7af4188c2a937ce04831ace8bb12bf84bd9e32c rsyslog-elasticsearch-7.4.7-7.el7_0.x86_64.rpm 805fb5b2aebd9a88028e496d49695918b8f4b5dc6d07b23babb4619b1c09a8b0 rsyslog-gnutls-7.4.7-7.el7_0.x86_64.rpm ef6c468d97fd791b0313a0755f8403355c5437b89aacf2a23c3e8e71d64883e8 rsyslog-gssapi-7.4.7-7.el7_0.x86_64.rpm 3ea324bf1b7274030b08eaf298345e31f462879ee2379756a32f13f505a59c97 rsyslog-libdbi-7.4.7-7.el7_0.x86_64.rpm 45ddb5e5d772077101b12edaea5282a6d17bdfb2b2bfd62c2f404fcf0782cdcd rsyslog-mmaudit-7.4.7-7.el7_0.x86_64.rpm 207a69be5ab3237c5fe6eba4811b6cadf6d7cd3a91af02cac1f2153c66257c9c rsyslog-mmjsonparse-7.4.7-7.el7_0.x86_64.rpm dfcff07a291887e0666402cf33a76399270dcb8f9ea1fbbf752951425207ff20 rsyslog-mmnormalize-7.4.7-7.el7_0.x86_64.rpm eedb2881ec82be8560681310fc6a7d67b6bbd6556bf45bf3a58b53b38c681f77 rsyslog-mmsnmptrapd-7.4.7-7.el7_0.x86_64.rpm 6fabf1ceff6963dfc1fd0f9f379c25e33ca913776270e9cd067414ca92470738 rsyslog-mysql-7.4.7-7.el7_0.x86_64.rpm d1e5dceec4084daa457a39cd2e60526ae5be249b695344a21be7ed8dea0add65 rsyslog-pgsql-7.4.7-7.el7_0.x86_64.rpm 5732b9cd681a759410d93815d77c42f039bb087907be8164055a7d5680039966 rsyslog-relp-7.4.7-7.el7_0.x86_64.rpm 57411118ac2fa283b397c3be55d7f21a222292656f14d656271ceaeaee494d28 rsyslog-snmp-7.4.7-7.el7_0.x86_64.rpm 771e03bb4a37817aa4e417f47a689b0712c115b4263d7df1079dee3376080028 rsyslog-udpspoof-7.4.7-7.el7_0.x86_64.rpm Source: 250ed2cfdecd54d606fe2a8c9139c7e0f634bf4a6d3fc2f32b1a198191fe5573 rsyslog-7.4.7-7.el7_0.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 116, Issue 7 ***********************************************

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Re: [CentOS] Recommended way of handling iptables firewall in CentOS?
by Niki Kovacs 13 Oct '14

13 Oct '14

Le 13/10/2014 11:11, Reindl Harald a écrit : > just write a bash script which resets and configures iptables with the > "iptables" command and at the end of the script call "/sbin/service > iptables save" which writes the current rules to /etc/sysconfig/iptables > and so at boot the rules get loaded atomically Thanks very much! I followed your advice, and here's a first version of a firewall script for a LAN server: https://github.com/kikinovak/centos/blob/master/6.x/firewall/firewall-lan.sh Cheers, Niki -- Microlinux - Solutions informatiques 100% Linux et logiciels libres 7, place de l'église - 30730 Montpezat Web : http://www.microlinux.fr Mail : info(a)microlinux.fr Tél. : 04 66 63 10 32

3 3

Hiding a network printer
by Frank Cox 13 Oct '14

13 Oct '14

I want to hide a printer that's connected to a Centos 6 printer server to prevent it showing up on some of the other computers on the local network. Using system-config-printer, putting the IP address of the computer that I want to hide the printer from into the Access Control window for that printer doesn't work since it apparently wants a user name, not an IP address. How can I specify that the printer can be seen only by certain IP addresses but not others? -- MELVILLE THEATRE ~ Real D 3D Digital Cinema ~ www.melvilletheatre.com

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centos7 livecd yum problem
by Don Vogt 13 Oct '14

13 Oct '14

I started to install centos7 using a livecd image. After booting the cd I tried a "yum install mc" which failed. I then tried "yum update" and got the following output. "[liveuser@localhost ~]$ sudo yum update Loaded plugins: fastestmirror, langpacks Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os error was 14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error" One of the configured repositories failed (Unknown), and yum doesn't have enough cached data to continue. At this point the only safe thing yum can do is fail. There are a few ways to work "fix" this: 1. Contact the upstream for the repository and get them to fix the problem. 2. Reconfigure the baseurl/etc. for the repository, to point to a working upstream. This is most often useful if you are using a newer distribution release than is supported by the repository (and the packages for the previous distribution release still work). 3. Disable the repository, so yum won't use it by default. Yum will then just ignore the repository until you permanently enable it again or use --enablerepo for temporary usage: yum-config-manager --disable <repoid> 4. Configure the failing repository to be skipped, if it is unavailable. Note that yum will try to contact the repo. when it runs most commands, so will have to try and fail each time (and thus. yum will be be much slower). If it is a very temporary problem though, this is often a nice compromise: yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true Cannot find a valid baseurl for repo: base/7/x86_64 I looked at thgeCentos-Base. repo from the live cd and it looks the same as the repo in centos6.5. I have no idea what to do next. This is my attempt to do step 1. above because I don't know how to do step 2. Any help would be appreciated on using the liveCD. Thanks

2 1

turn bootable USB into bootable iso image
by Steve Clark 13 Oct '14

13 Oct '14

Hello List I have a Bootable USB stick that we use to Boot our servers and then install CentOS, PostgreSQL and our SW thru a Kickstart script. It works like a charm but now we are thinking of going Virtual and prepping Virtual CentOS servers under VMware ESXi. However, to have the same "Boot and Install" functionality I see no other solution than Booting a VMware machine from an ISO. So, what I would like to do is to take the Bootable USB and make it into an ISO. Any ideas? Thanks, -- Stephen Clark

4 4

答复: turn bootable USB into bootable iso image
by 沈焕标 13 Oct '14

13 Oct '14

I am sorry for my misunderstanding. And I thing you should try the command "dd" to create an ISO file. For example: dd if=/dev/sdX of=/xxx/xxx/xxx.iso... I hope you will make it.. ------------------------ Best wishes ----------- ---------------Bill Shen ------------------------ ________________________________ 发件人: aravind J<mailto:aravindkumar.leo@gmail.com> 发送时间: ‎2014/‎10/‎11 17:32 收件人: CentOS mailing list<mailto:centos@centos.org> 主题: Re: [CentOS] turn bootable USB into bootable iso image On Oct 10, 2014 7:12 PM, "Steve Clark" <sclark(a)netwolves.com> wrote: > > Hello List > > I have a Bootable USB stick that we use to Boot our servers and then install CentOS, > PostgreSQL and our SW thru a Kickstart script. > > It works like a charm but now we are thinking of going Virtual and prepping Virtual CentOS servers under VMware ESXi. > > However, to have the same "Boot and Install" functionality I see no other solution than Booting a VMware machine from an ISO. > > So, what I would like to do is to take the Bootable USB and make it into an ISO. > > Any ideas? > Hi, Not sure whether the following will work, but just a thought. Create an .img file from the usb by doing a 'dd' from usb to .img file. Then attach the .img file to the vm as a disk and then boot the vm from the disk image to start regular kickstart installation. Thanks & Regards, Aravind _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

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Recommended way of handling iptables firewall in CentOS?
by Niki Kovacs 13 Oct '14

13 Oct '14

Hi, I'm planning to use CentOS 6.x on a handful of LAN servers. So far I've been using Slackware64 14.0 and 14.1 for the job. I wonder what's the orthodox/recommended way of configuring and iptables firewall with CentOS. I understand there's the system-config-securitylevel-tui NCurses interface which allows defining a basic set of rules. But what about the handful of more advanced rules I have to configure? Here's an example of an /etc/rc.d/rc.firewall script that I might use with Slackware. It contains mostly basic rules, and a couple of more advanced rules, one to limit SSH access, the other one to redirect HTTP traffic to Squid. If I want to copy my actual firewall configuration to CentOS, what would be the recommended way? I started from a bare bones minimal CentOS 6.5 installation, so system-config-securitylevel-tui is not even installed. Is it a good idea to try to configure /etc/sysconfig/iptables by hand? What do you suggest? Cheers, Niki -- Microlinux - Solutions informatiques 100% Linux et logiciels libres 7, place de l'église - 30730 Montpezat Web : http://www.microlinux.fr Mail : info(a)microlinux.fr Tél. : 04 66 63 10 32

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