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34747 discussions

BOINC
by Alessandro Baggi 23 Feb '17

23 Feb '17

Hi list, I've installed boinc-client and boinc-manager from epel. After starting boinc-client with systemctl when I try to connect from boincmgr I get "Unable to connect to boinc client". I've added to unit file --allow_remote_gui_rpc and on netstat I get: tcp 0 0 0.0.0.0:31416 0.0.0.0:* LISTEN 4762/boinc_client On this machine there aren't iptables rules I've also added my current user to boinc group without success. I've tried also to run boincmgr from root without success. Reading from https://boinc.berkeley.edu/wiki/Client_configuration I've not found any usefull config parameters to save in /var/lib/boinc/cc_config.xml Selinux is Disabled. I've tried also to run from a root shell: /usr/bin/boinc_client Running the manager from root I can connect to the client but from simple user I cannot. So I don't understand where is the problem. What I can do to solve this problem? Thanks in advance.

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Re: [CentOS] Network conections problems
by Rommel Rodriguez Toirac 23 Feb '17

23 Feb '17

El 21 de febrero de 2017 7:00:03 GMT-05:00, centos-request(a)centos.org escribió: >Send CentOS mailing list submissions to > centos(a)centos.org > > >From: Kahlil Hodgson <kahlil.hodgson(a)dp.exchange> >To: CentOS mailing list <centos(a)centos.org> >Subject: Re: [CentOS] Network conections problems > >First guess is that you may have two devices on the network with the >same ip address. > >Next time this happens, try doing > >1. 'arp -n' from a machine other than the db server >2. ping the other machine from the db server, then >3. 'arp -n' from the other machine > >Compare the outputs of the two invocations of arp. If the outputs show >different MAC addresses for 192.168.41.4 then you have two different >devices with the same IP address. > > I resolve the problem of network conection loose, but still a dude of how it happend and how it can be fixe. When I check with arping the MAC of sever change, for example rommel@p6:~$ arping 192.168.41.4 ARPING 192.168.41.4 from 192.168.41.6 enp3s0 Unicast reply from 192.168.41.4 [00:1D:09:FF:44:4B] 0.653ms Unicast reply from 192.168.41.4 [6C:92:BF:26:C7:03] 0.683ms Unicast reply from 192.168.41.4 [6C:92:BF:26:C7:03] 0.622ms Unicast reply from 192.168.41.4 [6C:92:BF:26:C7:03] 0.631ms ^CSent 3 probes (1 broadcast(s)) Received 4 response(s) The first answer is with a MAC diferent to the others one. But when I arping from the server inseft look the MAC associate to de IP address: [root@pgtm ] arping 192.168.41.4 -I eth1 ARPING 192.168.41.4 from 192.168.41.4 eth1 Unicast reply from 192.168.41.4 [00:1D:09:FF:44:4B] 0.658ms Unicast reply from 192.168.41.4 [00:1D:09:FF:44:4B] 0.654ms Unicast reply from 192.168.41.4 [00:1D:09:FF:44:4B] 0.654ms Unicast reply from 192.168.41.4 [00:1D:09:FF:44:4B] 0.662ms Unicast reply from 192.168.41.4 [00:1D:09:FF:44:4B] 0.655ms Sent 5 probes (1 broadcast(s)) Received 5 response(s) Looking in the config of network device I can not find the MAC 00:1D:09:FF:44:4B [root@pgtm ] ifconfig eth0 Link encap:Ethernet HWaddr 6C:92:BF:26:C7:02 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) Memory:c7220000-c723ffff eth1 Link encap:Ethernet HWaddr 6C:92:BF:26:C7:03 inet addr:192.168.41.4 Bcast:192.168.41.255 Mask:255.255.255.0 inet6 addr: fe80::6e92:bfff:fe26:c703/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:95819 errors:0 dropped:0 overruns:0 frame:0 TX packets:1924 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:11728605 (11.1 MiB) TX bytes:263674 (257.4 KiB) Memory:c7200000-c721ffff eth2 Link encap:Ethernet HWaddr 00:E0:ED:33:4E:9C UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) Memory:c7120000-c713ffff eth3 Link encap:Ethernet HWaddr 00:E0:ED:33:4E:9D UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) Memory:c7100000-c711ffff lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:249609 errors:0 dropped:0 overruns:0 frame:0 TX packets:249609 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:52090343 (49.6 MiB) TX bytes:52090343 (49.6 MiB) The solution was another IP address to this network device and then everything work fine. Why this happend? How I can erase the link beteewn MAC 00:1D:09:FF:44:4B and IP 192.168.41.4? Where can be stored this link? Right now in the network is not assignet the IP address 192.168.41.4 to no one device (printserver, switch, router, workstation or server) and still whe I make arping have the answer: rommel@p6:~$ arping 192.168.41.4 ARPING 192.168.41.4 from 192.168.41.6 enp3s0 Unicast reply from 192.168.41.4 [00:1D:09:FF:44:4B] 0.631ms Unicast reply from 192.168.41.4 [00:1D:09:FF:44:4B] 0.623ms Unicast reply from 192.168.41.4 [00:1D:09:FF:44:4B] 0.623ms Unicast reply from 192.168.41.4 [00:1D:09:FF:44:4B] 0.691ms ^CSent 4 probes (1 broadcast(s)) Received 4 response(s) arping to the new server IP address look like this (this is the MAC of eth0, where a plug the network cable): rommel@p6:~$ arping 192.168.41.7 ARPING 192.168.41.7 from 192.168.41.6 enp3s0 Unicast reply from 192.168.41.7 [6C:92:BF:26:C7:02] 0.580ms Unicast reply from 192.168.41.7 [6C:92:BF:26:C7:02] 0.607ms Unicast reply from 192.168.41.7 [6C:92:BF:26:C7:02] 0.613ms Unicast reply from 192.168.41.7 [6C:92:BF:26:C7:02] 0.594ms ^CSent 4 probes (1 broadcast(s)) Received 4 response(s) Rommel Rodriguez Toirac rommelrt(a)nauta.cu

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question about directory size in linux..
by Jason Welsh 23 Feb '17

23 Feb '17

on a CentOS release 6.8 (Final) I was looking around and noticed the following in a directory. [jason@server /app-vol/applications/]$ls -ld temp drwxr-xr-x 4 jason users 2899968 Feb 18 06:31 temp/ [jason@server /app-vol/applications/]$ How does the directory *itself* have a size of 2.8 megs? yes the contents in that temp directory add up to 2.8 megs, but.. umm. huh? when I run a stat on the temp directory, i get File: `temp' Size: 2899968 Blocks: 5672 IO Block: 4096 directory Device: fd02h/64770d Inode: 1836137 Links: 4 Access: (0755/drwxr-xr-x) Uid: ( 1022/ jason) Gid: ( 501/ users) Access: 2017-02-22 06:31:51.414190071 -0500 Modify: 2017-02-18 06:31:56.135448424 -0500 Change: 2017-02-18 06:31:56.135448424 -0500 on other "normal" directories, I see something like Size: 4096 Blocks: 8 IO Block: 4096 directory Jason

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Re: [CentOS] Network conections problems
by Istimsak Abdulbasir 23 Feb '17

23 Feb '17

On Feb 20, 2017 2:42 PM, "Rommel Rodriguez Toirac" <rommelrt(a)nauta.cu> wrote: Hi; I have a CentOS 6.8 x86_64 server where just run Oracle 11g 64 bit data base server. Is happen that sometimes it loose all connections (no ping, I can not access via ssh, no TNSping of Oracle server have success). When this happend I make ping from this server to some IP address of my network and then everything work fine again. I check logs looking for some mistake or problem in the network device, but I do not find anything or maybe I not looking where must be. I check that from a workstation (Windows XP or Windows 7 or Windows 10) when I make ping to the server, after ~ 8 seconds in get answer and always the first one is loose. If you try again ping, everything work fine (no answers are loose) C:\Users\administrator>ping pgtm.gtm.gob.cu Haciendo ping a pgtm.gtm.gob.cu [192.168.41.4] con 32 bytes de datos: Tiempo de espera agotado para esta solicitud. Respuesta desde 192.168.41.4: bytes=32 tiempo<1m TTL=64 Respuesta desde 192.168.41.4: bytes=32 tiempo<1m TTL=64 Respuesta desde 192.168.41.4: bytes=32 tiempo<1m TTL=64 Estadísticas de ping para 192.168.41.4: Paquetes: enviados = 4, recibidos = 3, perdidos = 1 (25% perdidos), Tiempos aproximados de ida y vuelta en milisegundos: Mínimo = 0ms, Máximo = 0ms, Media = 0ms This are some of the configs related with networks [root@pgtm ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0 TYPE=Ethernet UUID=11dcddd4-6530-457a-8d3e-01a8339fb113 ONBOOT=yes NM_CONTROLLED=yes BOOTPROTO=none HWADDR=6C:92:BF:26:C7:02 IPADDR=192.168.41.4 PREFIX=24 GATEWAY=192.168.41.1 DNS1=192.168.41.17 DOMAIN=gtm.gob.cu DEFROUTE=yes IPV4_FAILURE_FATAL=yes IPV6INIT=no NAME="System eth0" L I noticed from your ipcfg-eth0 file, the address 192.168.41.1 is assigned to eth0. When you typed the command "ifconfig", that same address was assigned to eth1. Try changing the name of this file to ipcfg-eth1 and restart networkmanager. As was stated earlier, check your gateway and see what other devices could be using that address. Put a block on that unknown MAC address if you can. cat /etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.41.4 pgtm pgtm.gtm.gob.cu [root@pgtm ~]# cat /etc/resolv.conf # Generated by NetworkManager search gtm.gob.cu nameserver 192.168.41.17 [root@pgtm mail]# cat /etc/sysconfig/network NETWORKING=yes HOSTNAME=pgtm.gtm.gob.cu GATEWAY=192.168.41.1 Someone that happend something like this, or some place for where keep looking to try to fix this loose of conection? Thank and sorry for my horryble English. Rommel Rodriguez Toirac rommelrt(a)nauta.cu _______________________________________________ CentOS mailing list CentOS(a)centos.org https://lists.centos.org/mailman/listinfo/centos

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Re: [CentOS] how to resize a partition of a disk define as a physical volume
by Istimsak Abdulbasir 22 Feb '17

22 Feb '17

On Feb 22, 2017 7:45 AM, "Bernard Fay" <bernard.fay(a)gmail.com> wrote: Hello, I have a CentOS VM with only one disk on a Xenserver. The disk has 2 partitions: /dev/xvda1 -> /boot /dev/xvda2 -> a physical volume for LVM I added 5GB to this disk via Xencenter to extend /dev/xvda2. Usually I just have to do "pvresize /dev/xvda" to have the additional space added to the disk. But for some reason it does not work for this disk. [root ~]# pvresize /dev/xvda Failed to find physical volume "/dev/xvda". 0 physical volume(s) resized / 0 physical volume(s) not resized K Xvda does not seem to be read as an LVM volume. Xvda2 is handled by lvm so this can be resized. However xvda is just the harddrive itself. From what I have learned using lvm briefly, you can only resize lvm volumes or partitions created using lvm. [root ~]# pvresize /dev/xvda2 Physical volume "/dev/xvda2" changed 1 physical volume(s) resized / 0 physical volume(s) not resized Does someone have seen this problem before or could have an idea of the problem? Thanks, Bernard _______________________________________________ CentOS mailing list CentOS(a)centos.org https://lists.centos.org/mailman/listinfo/centos

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how to resize a partition of a disk define as a physical volume
by Bernard Fay 22 Feb '17

22 Feb '17

Hello, I have a CentOS VM with only one disk on a Xenserver. The disk has 2 partitions: /dev/xvda1 -> /boot /dev/xvda2 -> a physical volume for LVM I added 5GB to this disk via Xencenter to extend /dev/xvda2. Usually I just have to do "pvresize /dev/xvda" to have the additional space added to the disk. But for some reason it does not work for this disk. [root ~]# pvresize /dev/xvda Failed to find physical volume "/dev/xvda". 0 physical volume(s) resized / 0 physical volume(s) not resized [root ~]# pvresize /dev/xvda2 Physical volume "/dev/xvda2" changed 1 physical volume(s) resized / 0 physical volume(s) not resized Does someone have seen this problem before or could have an idea of the problem? Thanks, Bernard

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Centos7 Postfixadmin with SELInux
by Robert Moskowitz 22 Feb '17

22 Feb '17

Anyone here running Postfixadmin on Centos7 with SELinux? The config.inc.php script has lots of warning comments about what you will have to do to get functions to work with SELinux, but does not supply any policy rules. I am still configuring, and so far I have only done: chcon -R -t httpd_sys_content_rw_t /usr/share/postfixadmin/templates_c (thanks Daniel) I suspect here are more so it can do things like create directories and files in the mail store (e.g. /home/vmail/). Oh my current server is running without SELinux (shutter) and that is one of the many reasons I want to upgrade. Bob

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Problems with my simple write conf files method
by Robert Moskowitz 22 Feb '17

22 Feb '17

I have been creating conf files and similar with the following method that I picked up (I think from psotfix docs): cat <<EOF>>/etc/aliases || exit 1 root: youremail EOF See: http://medon.htt-consult.com/Centos7-armv7.html But with postfixadmin I stumbled onto a problem. The following: cat <<EOF>/usr/share/postfixadmin/config.local.php || exit 1 <?php $CONF['database_type'] = 'mysqli'; $CONF['database_user'] = 'postfix'; $CONF['database_password'] = 'xyz'; $CONF['database_name'] = 'postfix'; $CONF['configured'] = true; ?> EOF produces: cat <<EOF>/usr/share/postfixadmin/config.local.php || exit 1 <?php ['database_type'] = 'mysqli'; ['database_user'] = 'postfix'; ['database_password'] = 'xyz'; ['database_name'] = 'postfix'; ['configured'] = true; ?> That is the '$CONF' gets processed. What can I do to avoid this (and any other 'gotchas') or can someone provide an alternative? thanks

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CentOS-announce Digest, Vol 144, Issue 6
by centos-announce-request＠centos.org 22 Feb '17

22 Feb '17

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit https://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-2017:0286 Moderate CentOS 6 openssl Security Update (Johnny Hughes) 2. CESA-2017:0286 Moderate CentOS 7 openssl Security Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Tue, 21 Feb 2017 11:44:42 +0000 From: Johnny Hughes <johnny(a)centos.org> To: centos-announce(a)centos.org Subject: [CentOS-announce] CESA-2017:0286 Moderate CentOS 6 openssl Security Update Message-ID: <20170221114442.GA16750(a)n04.lon1.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2017:0286 Moderate Upstream details at : https://rhn.redhat.com/errata/RHSA-2017-0286.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 168bc525c268d07b3fae14e4ba66dd7c6d9561f7789700feba0eeaf6951ff4e8 openssl-1.0.1e-48.el6_8.4.i686.rpm 765eff4b25e944dbadcd3523f89adb1b29f76337ff395cd5431c934dafd0cede openssl-devel-1.0.1e-48.el6_8.4.i686.rpm e5c04361a9531c903afde3b8876fe0dfb12520d70e5446f515750e98735aba7d openssl-perl-1.0.1e-48.el6_8.4.i686.rpm 57edfc2de0dbf1bf058e65898d500a725bd9c31cea6244a7e93af01c7776077d openssl-static-1.0.1e-48.el6_8.4.i686.rpm x86_64: 168bc525c268d07b3fae14e4ba66dd7c6d9561f7789700feba0eeaf6951ff4e8 openssl-1.0.1e-48.el6_8.4.i686.rpm f0b991e41e0a9d5d20ff60d1a7b5833a6f1cde6ed59bfdfab9a275d6d338b28e openssl-1.0.1e-48.el6_8.4.x86_64.rpm 765eff4b25e944dbadcd3523f89adb1b29f76337ff395cd5431c934dafd0cede openssl-devel-1.0.1e-48.el6_8.4.i686.rpm 6ebd15c228500784541fd778413348129c61c2af6249fd7043ef13c10c93bd60 openssl-devel-1.0.1e-48.el6_8.4.x86_64.rpm d9a31c566a6df0c15671c32e96abd64d8f0f906dc05ae995a2c57a64b70fa341 openssl-perl-1.0.1e-48.el6_8.4.x86_64.rpm 502e6c723c15b0aaf13bdb7a0faf6b647fcf953318e1782b6df3a2b2de323ff3 openssl-static-1.0.1e-48.el6_8.4.x86_64.rpm Source: dca305112f97f7c9a4c084e33901ffcd745bf260b8e1466fd9307eb819d388a9 openssl-1.0.1e-48.el6_8.4.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net Twitter: @JohnnyCentOS ------------------------------ Message: 2 Date: Tue, 21 Feb 2017 12:48:27 +0000 From: Johnny Hughes <johnny(a)centos.org> To: centos-announce(a)centos.org Subject: [CentOS-announce] CESA-2017:0286 Moderate CentOS 7 openssl Security Update Message-ID: <20170221124827.GA30499(a)n04.lon1.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2017:0286 Moderate Upstream details at : https://rhn.redhat.com/errata/RHSA-2017-0286.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) x86_64: 642eb35daa25ae290bd3922e7876ac5d61744cb56c0d3f7877e76320b99a8f59 openssl-1.0.1e-60.el7_3.1.x86_64.rpm 36fa878db932143ea4c107acb2deb34f78a9e7cb9159384b767f0932a27662d6 openssl-devel-1.0.1e-60.el7_3.1.i686.rpm 6d5b7f68f5cc4446092ab2c3502df813b0145a4186e654f22d241ca9a88f79c3 openssl-devel-1.0.1e-60.el7_3.1.x86_64.rpm 75afa599c87b32683162c976a3f7245767b1612b6fc1c1f935c41bcaaab71b8d openssl-libs-1.0.1e-60.el7_3.1.i686.rpm d3354df1c13897870b20407aed7b3eb1ee581b0e1f4af4bcd920fa57914202ca openssl-libs-1.0.1e-60.el7_3.1.x86_64.rpm 89aef81712ce7a139e59aa0e594db2c3bb03ba9f6bc2e161debb43705dee67a7 openssl-perl-1.0.1e-60.el7_3.1.x86_64.rpm a1af544918add7dbc76be337f395a816e1f3b0d7bae42fb0a6c812f8636c6f1d openssl-static-1.0.1e-60.el7_3.1.i686.rpm 8f7129a44f28934985e1b00ccec2a0c80271018a038afab49e23e22576c7d47c openssl-static-1.0.1e-60.el7_3.1.x86_64.rpm Source: 976eaf61e1cbe2ac4bf32a440a5697dc19be59fd1b275bb314fda8888c3340a4 openssl-1.0.1e-60.el7_3.1.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net Twitter: @JohnnyCentOS ------------------------------ Subject: Digest Footer _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org https://lists.centos.org/mailman/listinfo/centos-announce ------------------------------ End of CentOS-announce Digest, Vol 144, Issue 6 ***********************************************

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usermod under CentOS
by Beartooth 22 Feb '17

22 Feb '17

My wife's PC, running CentOS 6, suddenly quit connecting to the Net. Autodidact that I am, I fumbled with all the hard- and software I could find or dared try, but did no good. So we lugged it down to our favorite shop. While there, she bought a laptop, and asked them to install CentOS and copy all her files from the PC (including two books she's written and is trying to market). They called to ask whether I wanted to specify a username & password, or just use their default dummies. I chose the dummies -- and realized in the night that I've never changed a username before. I think, repeat think, I could hack it with mv and chown, but I had enough sense to try a few manuals and duckduckgo searches. Those eventually led me to usermod, and I took a look at 'man usermod'. It seems to be fairly powerful -- and therefore dangerous as well as apposite. So I ask here: are there caveats, gotchas, and/or other entities of their ilk that I need be wary of? -- Beartooth Staffwright, Not Quite Clueless Power User Remember I know little (precious little!) of where up is.

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