Discuss September 2016

discuss@lists.centos.org

118 participants
96 discussions

Where to get good threadpool c library
by qw 07 Sep '16

07 Sep '16

Hi, I can find many c libraries of good threadpool on centos. But is there some good threadpool c library for centos/linux? Thanks! regards andrew

1 0

Strange behaviour when using sudo+sh+executable.
by Rafał Radecki 07 Sep '16

07 Sep '16

Hi All. I am trying to install some software. Part of its installation is an invocation of command similar to: # sudo -H -E -u postgres /bin/bash -c /usr/bin/python2.7 /bin/bash: /usr/bin/python2.7: Permission denied >From my perspective: # ls -l /bin/bash /usr/bin/python2.7 -rwxr-xr-x. 1 root root 960376 Jul 8 2015 /bin/bash -rwxr-xr-x. 1 root root 7136 Oct 11 2015 /usr/bin/python2.7 # su - postgres Last login: Tue Sep 6 11:51:45 CEST 2016 on pts/6 -sh-4.2$ /bin/bash -c /usr/bin/python2.7 Python 2.7.5 (default, Oct 11 2015, 17:47:16) [GCC 4.8.3 20140911 (Red Hat 4.8.3-9)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> I tried the same for /bin/top. From my perspective this is quite a strange behaviour. Can someone help with this problem? BR, Rafal.

2 2

Re: [CentOS] group write permissions not being respected
by Chris Murphy 07 Sep '16

07 Sep '16

On Tue, Sep 6, 2016, 8:08 PM Pat Haley <phaley(a)mit.edu> wrote: > > Trying the gluster client seems to fix the problem. > Hmm, suggests an NFS export issue then, rather than permissions issue? Chris Murphy

1 0

None
by None 07 Sep '16

07 Sep '16

by outgoing.mit.edu (8.13.8/8.12.4) with ESMTP id u8727fcW006708 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT) for <centos(a)centos.org>; Tue, 6 Sep 2016 22:07:42 -0400 To: centos(a)centos.org References: <d059a28c-b866-5056-dda6-29e3077ca907(a)mit.edu> <8d10f9b1-0ed9-0217-ae0e-726acd1d9a87(a)gmail.com> <8d59038f-3dbe-5bff-9673-fbada1d3f31c(a)mit.edu> <b9abfd5a5a37f29bff085aae6174877f.squirrel(a)host290.hostmonster.com> <d9ac7e12-3283-ea9e-a5b0-5dcd8d27d87d(a)mit.edu> <CAJCQCtTfr6rvPGH7uMNzYE9-Q+BfZ784a5n=4S5NekA7O8VxAA(a)mail.gmail.com> <c29b1a4f-a3d5-b61e-7206-b6e32a89f72c(a)mit.edu> <CAJCQCtQ6vq6OQsbgZjxz2qqgjGwh-XEwsoeBYjzwNMMcvQkDrQ(a)mail.gmail.com> From: Pat Haley <phaley(a)mit.edu> Message-ID: <8b172cfc-7a1a-39e2-a259-a698f2fa63ba(a)mit.edu> Date: Tue, 6 Sep 2016 22:07:35 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 In-Reply-To: <CAJCQCtQ6vq6OQsbgZjxz2qqgjGwh-XEwsoeBYjzwNMMcvQkDrQ(a)mail.gmail.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrOIsWRmVeSWpSXmKPExsUixG6nrptXdj7cYP5DE4tlZxYwOzB6rGyb zBzAGMVlk5Kak1mWWqRvl8CVMbv5EVPBCfGKBZ/CGxhnCHcxcnJICJhInGh6ydzFyMUhJNDG JHG/8yobhHOCUeLq/8ksEM4BJomW/suMIC3CAo4SL15uZwOxRQREJXoWv4LquMIsMeHuRyaQ BJuAgsS6W2fYQWxeASuJqXdvgDWzCKhI7Dv+ihnEFhWIkLi16iMjRI2gxMmZT1hAbE6BQIm5 E2eC2cwCthJ35u5mhrDlJba/ncM8gZF/FpKWWUjKZiEpW8DIvIpRNiW3Sjc3MTOnODVZtzg5 MS8vtUjXVC83s0QvNaV0EyM4/FyUdjBO/Od1iFGAg1GJh7di97lwIdbEsuLK3EOMkhxMSqK8 aoFAIb6k/JTKjMTijPii0pzU4kOMEhzMSiK8swrPhwvxpiRWVqUW5cOkpDlYlMR5u2YcCBcS SE8sSc1OTS1ILYLJynBwKEnwVpcCNQoWpaanVqRl5pQgpJk4OEGG8wANzwCp4S0uSMwtzkyH yJ9iVJQS550JkhAASWSU5sH1gtODGvuhV4ziQK8I8y4HqeIBpha47ldAg5mABq/bfRpkcEki QkqqgdHumJ85C5vW18rsVTyCu9hbrXdG2i/MkH2WXn78eE+i2V6Lk/ebckNVCli+3O24tr6E bfeV0xsEjxTsCnVyNN0hMzf47a/tF/aLrCntn2w/MVOm4uYq+am5pdVfVWufLhcQn1Nz3Db2 jNUdszzZz0YlYSf0ikR1G3PO+afcqT8ke64wUXd1ixJLcUaioRZzUXEiANN4uRjqAgAA Subject: Re: [CentOS] group write permissions not being respected X-BeenThere: centos(a)centos.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: CentOS mailing list <centos.centos.org> List-Unsubscribe: <https://lists.centos.org/mailman/options/centos>, <mailto:centos-request@centos.org?subject=unsubscribe> List-Archive: <http://lists.centos.org/pipermail/centos/> List-Post: <mailto:centos@centos.org> List-Help: <mailto:centos-request@centos.org?subject=help> List-Subscribe: <https://lists.centos.org/mailman/listinfo/centos>, <mailto:centos-request@centos.org?subject=subscribe> X-List-Received-Date: Wed, 07 Sep 2016 02:07:43 -0000 Trying the gluster client seems to fix the problem. On 09/02/2016 12:57 AM, Chris Murphy wrote: > On Thu, Sep 1, 2016, 8:11 AM Pat Haley <phaley(a)mit.edu> wrote: > >> For the enforcing=0, is that referring to SELinux? If so, we are not >> running SELinux. >> > > OK so neither that nor chcon nor context mount option apply. It's something > else. > > > > > >> On 08/31/2016 11:38 PM, Chris Murphy wrote: >> >> ---------------------------------------------------------------------------------------- >>> Try booting with enforcing=0 and if that fixes it, you need to find out >>> what security label is needed for gluster. >> ---------------------------------------------------------------------------------------- >> For the enforcing=0, is that referring to SELinux? If so, we are not >> running SELinux. >> >> ----------------------------------------------------------------------------------------- >> >>> Chances are it's easiest to use -o context= mount option on the brick, >> but >>> if the brick is not exclusive to gluster you'll need chcon -R. >> ----------------------------------------------------------------------------------------- >> We aren't sure exactly what you mean by this second paragraph, can >> you expand on this? Are these two exclusive options exclusive? We aren't >> sure what you what you mean by "exclusive to gluster" >> >> ----------------------------------------------------------------------------------------- >>> If that's not it, maybe try the gluster client instead of using NFS. See >> if >>> you get a different result that narrows down what's going on. >>> >>> My vague recollection is for Samba, without the correct SELinux label, I >>> could neither read nor write. >>> >>> >>> Chris Murphy >>> _______________________________________________ >>> CentOS mailing list >>> CentOS(a)centos.org >>> https://lists.centos.org/mailman/listinfo/centos >> -- >> >> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- >> Pat Haley Email: phaley(a)mit.edu >> Center for Ocean Engineering Phone: (617) 253-6824 >> Dept. of Mechanical Engineering Fax: (617) 253-8125 >> MIT, Room 5-213 http://web.mit.edu/phaley/www/ >> 77 Massachusetts Avenue >> Cambridge, MA 02139-4301 >> >> _______________________________________________ >> CentOS mailing list >> CentOS(a)centos.org >> https://lists.centos.org/mailman/listinfo/centos >> > _______________________________________________ > CentOS mailing list > CentOS(a)centos.org > https://lists.centos.org/mailman/listinfo/centos -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Pat Haley Email: phaley(a)mit.edu Center for Ocean Engineering Phone: (617) 253-6824 Dept. of Mechanical Engineering Fax: (617) 253-8125 MIT, Room 5-213 http://web.mit.edu/phaley/www/ 77 Massachusetts Avenue Cambridge, MA 02139-4301

1 0

389 Directory Server
by Paolo Rughetti 06 Sep '16

06 Sep '16

Hi all, I would like install 389 Directory Server on a Centos 6.8 server. I followed the instructions reported in : https://wiki.centos.org/HowTos/DirectoryServerSetup?highlight=%28directory%… and installed with yum the following packages : 389-ds-base-1.2.11.15-75.el6_8.x86_64 389-ds-console-1.2.6-1.el6.noarch 389-ds-base-libs-1.2.11.15-75.el6_8.x86_64 389-adminutil-1.1.19-1.el6.x86_64 389-admin-1.1.35-1.el6.x86_64 To proceed with the installation I would like to read the instructions reported here : https://access.redhat.com/documentation/en/red-hat-directory-server/ where I can choose the product version between 8.0 to 10. I would like to know which version of 389 Directory Server match installed packages so I can select the right manual. I would like also to know if it is better install the last version of 389 from http://www.port389.org. Thanking you in advance. Bets regards. -- *---*---*---*---*---*---*---*---*---*---*---*---*---*---* Paolo Rughetti Consiglio Nazionale delle Ricerche Istituto per le Applicazioni del Calcolo "M. Picone" Via dei Taurini 19 00185 ROME ITALY _____________________________ |\___________________________/| |E-mail: p.rughetti(a)iac.cnr.it| |Tel: 039-06-49270956 | |Fax: 039-06-4404306 | |_____________________________| *---*---*---*---*---*---*---*---*---*---*---*---*---*---*

2 1

more than one IP address on network device?
by Walter H. 06 Sep '16

06 Sep '16

Hello /etc/sysconfig/network-scripts/ifcfg-eth0 looks like this: # Intel Corporation 82545EM Gigabit Ethernet Controller (Copper) TYPE=Ethernet NAME=eth0 NM_CONTROLLED=no IPV4_FAILURE_FATAL=yes UUID=cc2635ff-3c14-48ba-b19a-84c5b9d36a9d ONBOOT=yes DEVICE=eth0 BOOTPROTO=none HWADDR=00:50:56:01:00:01 BROADCAST=192.168.0.255 IPADDR=192.168.0.10 NETMASK=255.255.255.0 NETWORK=192.168.0.0 GATEWAY=192.168.0.1 DNS1=192.168.0.1 DNS2=192.168.0.100 DOMAIN='domain.tld' USERCTL=no IPV6INIT=yes IPV6ADDR=ipv6addr IPV6_AUTOCONF=no IPV6_DEFAULTGW=ipv6addr-gateway IPV6_DEFAULTDEV=eth0 if I would need an additional IPv6 address I'd just add IPV6ADDR_SECONDARIES="ipv6addr" to this file; if I would need an additional IPv4 address this works only by a virtual device e.g. eth0:1 like this: /etc/sysconfig/network-scripts/ifcfg-eth0:1 # Intel Corporation 82545EM Gigabit Ethernet Controller (Copper), Alias 1 TYPE=Ethernet DEVICE=eth0:1 ONPARENT=yes BOOTPROTO=none BROADCAST=192.168.0.255 IPADDR=192.168.0.17 NETMASK=255.255.255.0 NETWORK=192.168.0.0 GATEWAY=192.168.0.1 DNS1=192.168.0.1 DNS2=192.168.0.100 why can't I add this to the virtual device eth0:1, if I needed both an additional IPv4 and an additional IPv6 address? IPV6INIT=yes IPV6ADDR=ipv6addr IPV6_AUTOCONF=no IPV6_DEFAULTGW=ipv6addr-gateway IPV6_DEFAULTDEV=eth0:1 Thanks, Walter

12 20

/etc/sysconfig/network HOSTNAME settings
by Walter H. 06 Sep '16

06 Sep '16

Hello, I found different ways to define the hostname ... this HOSTNAME="host.domain.tld" or this: HOSTNAME="host" DOMAIN="domain.tld" what is the correct way? Thanks, Walter

2 1

mounting lvm2
by Alice Wonder 06 Sep '16

06 Sep '16

CentOS 7 for everything I am probably never using lvm again. I have never not once actually benefited from its capabilities but this is probably the third or fourth time it has gotten in my way. Issue is that I use the tools so rarely that I can't recall what needs to be done to properly mount the drives on another system and finding that info on the web is becoming more difficult as the noise in search results increases, more and more results are damn youtube videos, and my eyes are deteriorating. So its just fixed ext4 for me in the future, KISS. End of rant. PC mobo died. Most data I need from it backed up to github, few things done that day didn't make the last commit and I'd rather not do them again. Trying to mount drive on my laptop via USB interface. Which is easy when drives are plain old ext4 and not ext4 sitting on top lvm2. * end frustrated rant * [root@localhost ~]# vgs VG #PV #LV #SN Attr VSize VFree centos 1 3 0 wz--n- 111.30g 0 centos 1 3 0 wz--n- 223.08g 0 [root@localhost ~]# vgscan Reading all physical volumes. This may take a while... Found volume group "centos" using metadata type lvm2 Found volume group "centos" using metadata type lvm2 [root@localhost ~]# [root@localhost ~]# pvdisplay /dev/sdb2 --- Physical volume --- PV Name /dev/sdb2 VG Name centos PV Size 111.30 GiB / not usable 4.00 MiB Allocatable yes (but full) PE Size 4.00 MiB Total PE 28492 Free PE 0 Allocated PE 28492 PV UUID mnFTy9-PoVX-paaA-iBML-kXh5-1Zk5-PQTPW1 [root@localhost ~]# That's the volume that I need to mount, it is in a VG named centos which is the same VG name as what the laptop I am using uses. I have created /mnt/tmp which is where I want to mount it. I am a bit worried both having the same VG name (centos) may be an issue, I believe the next step is suppose to be to use vgchange to activate the volume group but I am a bit hesitant to issuing that command with an argument that includes a volume group that is already active. There is only one physical disc in the volume I need to mount, that was a lesson I learned the hard way previously - don't use multiple disks in a LVM2 volume without hardware redundancy. And with today's disk sizes it really isn't needed, not for what I do. Where do I go from here to mount that volume? Thanks. -- -=- Sent my from my laptop, may not be able to respond timely

4 4

Network manager cannot connet to the Internet
by sunyeping 06 Sep '16

06 Sep '16

Dear all, I find out of a sudden my Network manager cannot connect to the Internet. My OS is Centos 6.7, and the version of Network manager is Applet 0.8.1. When clinking the Network manager icon at the upper right conner at the Desktop of my compuer, I can see in the pop-up manu that there are two network cards (Intel 82573E Gigabit Ethernet Controller (Copper) and Intel 82573L Gigabit Ethernet Controller) but only one link (System eth1) available. Usually when clicking the "System eth1" the Internet connection would be established. However from this morning clicking the "System eth1" only gives connect failure information. I don't know whether this is caused by intalling a large software package (ambertool 16 ) which requires many updates in my system yesterday. But when I give "ifconfig" command in a gnome terminal, the output information seems to be correct: [sunyp@localhost Desktop]$ ifconfig eth0 Link encap:Ethernet HWaddr 00:25:90:72:E2:86 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) Interrupt:16 Memory:faee0000-faf00000 eth1 Link encap:Ethernet HWaddr 00:25:90:72:E2:87 inet6 addr: fe80::225:90ff:fe72:e287/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:49 errors:0 dropped:0 overruns:0 frame:0 TX packets:11 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:16386 (16.0 KiB) TX bytes:3038 (2.9 KiB) Interrupt:17 Memory:fafe0000-fb000000 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:90 errors:0 dropped:0 overruns:0 frame:0 TX packets:90 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:6737 (6.5 KiB) TX bytes:6737 (6.5 KiB) What I can do now? Could anyone help me with this problem? Best regards. Yeping Sun

3 2

Whether to use systemd to start services
by Stalker, Tim 06 Sep '16

06 Sep '16

I'm wondering if it's normally required to start services with systemd as opposed to sysv? I currently load a few services using the old init.d/service funtionality, which still works fine. Is this ok or is sysv going to be fully discontinued in the future? The service I load is celeryd via init.d but so far finding few pointers as to how to do this with a celery.service file. I can load the service with this line execStart=/etc/init.d/celeryd Thanks, Tim

2 1

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Discuss September 2016