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• Script execution flow stopped?

  - by vijay.shad

  Hi all, Now my script is able to start server, But I am still have some problem with my script. When the start server command is executed, the control does not pass the line and does not execute further of that line. Please tell me what is the problem and how can I get smooth execution of the my script.

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• Samba Server needs to have AD authentication

  - by vivek

  My Linux server is connected to AD via Bind DN and password (without domain joining). It is using sssd for authentication. I am able to ssh and login without any issue. I have a proper setup of uid and guid, etc. .. There is no issue with logging to the linux server. I want the samba service to use AD accounts, but I can't find documentation for how to configure it in this case. Can anyone explain how to configure samba to use active directory for authentication on a system using sssd?

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• Frequent Kernel Panic on CentOS 6.5

  - by Manuel Sopena Ballesteros

  I have a webserver with the configuration below: VMWare ESXi environemt CPanel installed CentOS release 6.5 (Final) 4 CPUs 2G RAM 2x VM disks 100G each LVM system My issue is I am getting kernel panic quite frequently. These is a list of some processes blocked I could see from the console: mysqld queueprocd httpd suphp vmtoolsd loop0 auditd this is my sar logs Linux 2.6.32-431.3.1.el6.x86_64 (test01) 08/22/2014 _x86_64_ (4 CPU) 12:00:01 AM CPU %user %nice %system %iowait %steal %idle 12:10:01 AM all 26.86 0.01 0.98 0.57 0.00 71.57 12:20:01 AM all 1.78 0.02 1.03 0.08 0.00 97.09 12:30:01 AM all 26.34 0.02 0.85 0.05 0.00 72.74 12:40:01 AM all 27.12 0.01 1.11 1.22 0.00 70.54 12:50:01 AM all 1.59 0.02 0.94 0.13 0.00 97.32 01:00:01 AM all 26.10 0.01 0.77 0.04 0.00 73.07 01:10:01 AM all 27.51 0.01 1.16 0.14 0.00 71.18 01:20:01 AM all 1.80 0.07 1.06 0.08 0.00 96.99 01:30:01 AM all 26.19 0.01 0.78 0.05 0.00 72.96 01:40:01 AM all 26.62 0.02 0.87 0.05 0.00 72.45 01:50:02 AM all 1.35 0.01 0.87 0.02 0.00 97.75 02:00:01 AM all 26.11 0.02 0.69 0.02 0.00 73.17 02:10:01 AM all 26.73 0.02 0.89 0.14 0.00 72.21 02:20:01 AM all 1.45 0.01 0.92 0.04 0.00 97.58 02:30:01 AM all 26.59 0.01 1.06 0.03 0.00 72.31 02:40:01 AM all 26.27 0.01 0.72 0.05 0.00 72.95 02:50:01 AM all 0.86 0.01 0.50 0.09 0.00 98.53 03:00:01 AM all 25.61 0.02 0.39 0.03 0.00 73.96 03:10:01 AM all 26.30 0.08 0.66 0.14 0.00 72.82 03:20:01 AM all 0.81 0.01 0.51 0.04 0.00 98.63 03:30:02 AM all 26.15 0.02 0.53 0.07 0.00 73.24 03:40:01 AM all 26.06 0.01 0.47 0.04 0.00 73.42 03:50:01 AM all 0.96 0.02 0.51 0.03 0.00 98.48 Average: all 17.69 0.02 0.79 0.14 0.00 81.36 06:58:14 AM LINUX RESTART 07:00:01 AM CPU %user %nice %system %iowait %steal %idle 07:10:01 AM all 1.04 0.02 0.57 0.95 0.00 97.42 07:20:02 AM all 0.66 0.01 0.39 0.06 0.00 98.87 07:30:01 AM all 25.71 0.01 0.45 0.16 0.00 73.67 07:40:01 AM all 25.88 0.01 0.35 0.08 0.00 73.68 As you can see the server became unresponsive at 03.50 AM and I had to reset the VM at 06.58 AM to fix it. sar -d 03:00:01 PM dev8-16 0.16 0.01 3.37 20.78 0.00 12.40 9.29 0.15 03:00:01 PM dev8-0 4.08 5.72 77.50 20.38 0.06 15.15 3.13 1.28 03:00:01 PM dev253-0 10.37 5.74 80.87 8.35 0.13 12.52 1.24 1.29 03:00:01 PM dev253-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 03:10:01 PM dev8-16 0.27 0.17 3.17 12.22 0.00 11.49 7.95 0.22 03:10:01 PM dev8-0 6.37 18.98 136.19 24.34 0.05 7.25 2.18 1.39 03:10:01 PM dev253-0 17.91 19.15 137.94 8.77 0.13 7.11 0.78 1.41 03:10:01 PM dev253-1 0.18 0.00 1.41 8.00 0.00 9.09 0.52 0.01 03:10:01 PM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm %util 03:20:01 PM dev8-16 0.17 0.23 2.04 13.39 0.00 6.07 5.29 0.09 03:20:01 PM dev8-0 3.83 18.57 78.45 25.35 0.05 13.25 2.73 1.05 03:20:01 PM dev253-0 10.30 18.80 80.49 9.64 0.14 13.89 1.03 1.06 03:20:01 PM dev253-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 03:30:01 PM dev8-16 0.26 0.16 4.59 18.56 0.00 6.44 5.54 0.14 03:30:01 PM dev8-0 5.97 24.07 117.83 23.77 0.05 8.53 2.13 1.27 03:30:01 PM dev253-0 15.90 24.23 122.42 9.22 0.12 7.71 0.81 1.29 03:30:01 PM dev253-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 03:40:01 PM dev8-16 0.20 0.00 2.32 11.44 0.00 8.35 5.90 0.12 03:40:01 PM dev8-0 4.39 19.58 77.94 22.24 0.06 12.87 2.12 0.93 03:40:01 PM dev253-0 10.25 19.58 80.25 9.74 0.12 11.63 0.91 0.94 03:40:01 PM dev253-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 03:50:01 PM dev8-16 0.23 0.50 2.32 12.44 0.00 6.27 5.13 0.12 03:50:01 PM dev8-0 5.09 9.00 95.04 20.45 0.04 7.36 2.10 1.07 03:50:01 PM dev253-0 12.47 9.50 96.82 8.53 0.08 6.76 0.87 1.08 03:50:01 PM dev253-1 0.07 0.00 0.54 8.00 0.00 14.10 0.40 0.00 04:00:01 PM dev8-16 0.21 0.00 2.04 9.89 0.00 7.00 5.87 0.12 04:00:01 PM dev8-0 4.68 1.64 94.70 20.57 0.05 10.71 2.41 1.13 04:00:01 PM dev253-0 12.27 1.64 96.74 8.02 0.12 9.95 0.93 1.14 sar -q 01:00:01 AM 6 205 2.02 1.32 0.81 01:10:01 AM 3 187 0.08 0.72 0.86 01:20:01 AM 2 187 0.04 0.18 0.49 01:30:01 AM 4 205 2.04 1.34 0.82 01:40:01 AM 2 185 0.02 0.68 0.83 01:50:02 AM 1 185 0.08 0.15 0.45 02:00:01 AM 5 202 2.02 1.30 0.78 02:10:01 AM 4 185 0.11 0.72 0.84 02:20:01 AM 1 183 0.17 0.15 0.45 02:30:01 AM 5 206 2.03 1.32 0.79 02:40:01 AM 2 184 0.08 0.70 0.83 02:50:01 AM 1 183 0.00 0.10 0.43 03:00:01 AM 7 205 2.03 1.32 0.78 03:10:01 AM 2 194 0.34 0.73 0.83 03:20:01 AM 1 184 0.00 0.13 0.44 03:30:02 AM 4 201 2.04 1.32 0.78 03:40:01 AM 2 193 0.06 0.67 0.81 03:50:01 AM 1 183 0.06 0.12 0.43 Average: 3 192 0.68 0.70 0.69 06:58:14 AM LINUX RESTART 07:00:01 AM runq-sz plist-sz ldavg-1 ldavg-5 ldavg-15 07:10:01 AM 2 181 0.00 0.09 0.11 07:20:02 AM 1 179 0.00 0.00 0.04 07:30:01 AM 4 197 2.12 1.33 0.58 sar -r Linux 2.6.32-431.3.1.el6.x86_64 (test01) 08/22/2014 _x86_64_ (4 CPU) 12:00:01 AM kbmemfree kbmemused %memused kbbuffers kbcached kbcommit %commit 12:10:01 AM 227484 1694468 88.16 117444 917004 635308 10.50 12:20:01 AM 219692 1702260 88.57 119556 920540 630940 10.43 12:30:01 AM 196248 1725704 89.79 121376 923592 695048 11.49 12:40:01 AM 127524 1794428 93.36 125004 1016196 633048 10.46 12:50:01 AM 127156 1794796 93.38 128212 1014536 624992 10.33 01:00:01 AM 110764 1811188 94.24 129964 1001608 700016 11.57 01:10:01 AM 160560 1761392 91.65 132260 973472 628640 10.39 01:20:01 AM 133076 1788876 93.08 134144 982608 655524 10.83 01:30:01 AM 121512 1800440 93.68 135548 985676 700500 11.58 01:40:01 AM 140640 1781312 92.68 137220 988576 628280 10.38 01:50:02 AM 139160 1782792 92.76 138688 990672 625224 10.33 02:00:01 AM 106112 1815840 94.48 139940 993976 700360 11.57 02:10:01 AM 155400 1766552 91.91 142112 971864 625656 10.34 02:20:01 AM 154056 1767896 91.98 143732 975556 621352 10.27 02:30:01 AM 110856 1811096 94.23 145032 978288 709360 11.72 02:40:01 AM 140200 1781752 92.71 146568 980656 624872 10.33 02:50:01 AM 137600 1784352 92.84 148940 984484 621948 10.28 03:00:01 AM 105032 1816920 94.54 150208 985736 706060 11.67 03:10:01 AM 168996 1752956 91.21 154708 941500 656312 10.85 03:20:01 AM 169408 1752544 91.19 156096 944100 621780 10.28 03:30:02 AM 132360 1789592 93.11 157724 951612 701296 11.59 03:40:01 AM 159012 1762940 91.73 158940 942560 656292 10.85 03:50:01 AM 163192 1758760 91.51 160312 944576 624544 10.32 Average: 148089 1773863 92.29 140162 969973 653363 10.80 06:58:14 AM LINUX RESTART 07:00:01 AM kbmemfree kbmemused %memused kbbuffers kbcached kbcommit %commit 07:10:01 AM 1016628 905324 47.10 85568 447556 600932 9.93 07:20:02 AM 1009996 911956 47.45 87616 451200 596156 9.85 07:30:01 AM 961128 960824 49.99 89164 464332 658912 10.89 07:40:01 AM 973376 948576 49.35 90880 473084 600176 9.92 dmesg does not show any relevant information. I don't see any bottleneck in sar, any idea what can I check next? thank you very much

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• Fast (non-blocking) way to transfer many files to another server

  - by Nyxynyx

  I am currently attempting to transfer over 1 million files from one server to another. Using wget, it seems to be extremely slow, probably because it starts a new transfer after the previous one has been completed. Question: Is there a faster non-blocking (asynchronous) way to do the transfer? I do not have enough space on the first server to compress the files into tar.gz and transferring them over. Thanks!

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• UCARP: prevent the original master from taking over the VIP when it comes back after failure?

  - by quanta

  Keepalived can do this by combining the nopreempt option and the BACKUP state on the both nodes: Prevent VRRP Master from becoming Master once it has failed Prevent master to fall back to master after failure How about the UCARP? Name : ucarp Arch : x86_64 Version : 1.5.2 Release : 1.el5.rf Size : 81 k Repo : installed Summary : Common Address Redundancy Protocol (CARP) for Unix URL : http://www.ucarp.org/ License : BSD Description: UCARP allows a couple of hosts to share common virtual IP addresses in order : to provide automatic failover. It is a portable userland implementation of the : secure and patent-free Common Address Redundancy Protocol (CARP, OpenBSD's : alternative to the patents-bloated VRRP). : Strong points of the CARP protocol are: very low overhead, cryptographically : signed messages, interoperability between different operating systems and no : need for any dedicated extra network link between redundant hosts. If I don't use the --preempt option and set the --advskew to the same value, both nodes become master. /etc/sysconfig/carp/vip-010.conf # Virtual IP configuration file for UCARP # The number (from 001 to 255) in the name of the file is the identifier # $Id: vip-001.conf.example 1527 2004-07-09 15:23:54Z dude $ # Set the same password on all mamchines sharing the same virtual IP PASSWORD="pa$$w0rd" # You are required to have an IPADDR= line in the configuration file for # this interface (so no DHCP allowed) BIND_INTERFACE="eth0" # Do *NOT* use a main interface for the virtual IP, use an ethX:Y alias # with the corresponding /etc/sysconfig/network-scripts/ifcfg-ethX:Y file # already configured and ith ONBOOT=no VIP_INTERFACE="eth0:0" # If you have extra options to add, see "ucarp --help" output # (the lower the "-k <val>" the higher priority and "-P" to become master ASAP) OPTIONS="-z -k 255" /etc/sysconfig/network-scripts/ifcfg-eth0:0 DEVICE=eth0:0 ONBOOT=no BOOTPROTO= IPADDR=192.168.6.8 NETMASK=255.255.255.0 USERCTL=yes IPV6INIT=no node 1: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether c6:9b:8e:af:a7:69 brd ff:ff:ff:ff:ff:ff inet 192.168.6.192/24 brd 192.168.6.255 scope global eth0 inet 192.168.6.8/24 brd 192.168.6.255 scope global secondary eth0:0 inet6 fe80::c49b:8eff:feaf:a769/64 scope link valid_lft forever preferred_lft forever node 2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000 link/ether 00:30:48:f7:0f:81 brd ff:ff:ff:ff:ff:ff inet 192.168.6.38/24 brd 192.168.6.255 scope global eth1 inet 192.168.6.8/24 brd 192.168.6.255 scope global secondary eth1:0 inet6 fe80::230:48ff:fef7:f81/64 scope link valid_lft forever preferred_lft forever

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• Find actual Centos6 path for %{_includedir} in spec file?

  - by Dayo

  I am trying to find out which path actually resolves to %{_includedir} in a Centos6 installation. I understand that this is normally "/usr/include" but where can I find where it is actually set or somehow "echo" it? Basically, a spec I am using has "%dir %{_includedir}/someFolder/someFile". Everything runs fine but I can't find "/usr/include/someFolder". I assume it has been created somewhere else and I am trying to find out where that is.

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• Configuring two DNS zones with named.conf

  - by tike

  I am trying to configure DNS to run two domain names. I am able to do one domain but am not sure how to configure a second domain. So for example: test.com and test1.com on same machine. How do i configure zone file and named.conf to achieve this?

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• Free memory on linux [closed]

  - by Julia Roberts

  Possible Duplicate: Meaning of the buffers/cache line in the output of free What would be a good setting to free memory on linux? I have 8GB but gets used up so fast. current settings: kernel.sched_min_granularity_ns = 10000000 kernel.sched_wakeup_granularity_ns = 15000000 vm.dirty_ratio = 40 kernel.pid_max = 4096 vm.bdflush = 100 1200 128 512 15 5000 500 1884 2 What settings would I need so linux frees old ram faster?

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• Updating PHP on a Plesk managed Server

  - by mblaettermann

  I just updated PHP and MySQl on my VPS with the current Versions from Atomic Repo. Everything worked out fine so far. From console I get the new PHP 5.3: [root@server phpMyAdmin]# php -v PHP 5.3.16 (cli) (built: Aug 20 2012 11:18:05) Copyright (c) 1997-2012 The PHP Group Zend Engine v2.3.0, Copyright (c) 1998-2012 Zend Technologies with the ionCube PHP Loader v4.0.5, Copyright (c) 2002-2011, by ionCube Ltd. But through Apache I still get the old version (5.1.6). The server is running some old version of crappy Plesk Panel. That gives me the option to choose between Apache Modul, fCGI and CGI-BIN. Any hints, how to update apache, so it will use the new PHP Version? EDIT: I just needed to restart httpd (/etc/init.d/httpd restart)

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• Clear OS always showing "Operation too slow. Less than 1 bytes/sec"

  - by Blue Gene

  Have been trying to install clear os addon but nothing is working as i am facing this error on every mirror in the .repo file. Yum install squid http://mirror2-dallas.clearsdn.com/clearos/core/6/x86_64/repodata/primary.sqlite.bz2: [Errno 12] Timeout on http://mirror2-dallas.clearsdn.com/clearos/core/6/x86_64/repodata/primary.sqlite.bz2: (28, 'Operation too slow. Less than 1 bytes/sec transfered the last 30 seconds') Trying other mirror. mirror2-dc.clearsdn.com/clearos/core/6/x86_64/repodata/primary.sqlite.bz2: [Errno 12] Timeout on mirror2-dc.clearsdn.com/clearos/core/6/x86_64/repodata/primary.sqlite.bz2: (28, 'Operation too slow. Less than 1 bytes/sec transfered the last 30 seconds') Trying other mirror. mirror1.timburgess.net/clearos/core/6/x86_64/repodata/primary.sqlite.bz2: [Errno 12] Timeout on mirror1.timburgess.net/clearos/core/6/x86_64/repodata/primary.sqlite.bz2: (28, 'Operation too slow. Less than 1 bytes/sec transfered the last 30 seconds') Trying other mirror. mirror2-houston.clearsdn.com/clearos/core/6/x86_64/repodata/primary.sqlite.bz2: [Errno 12] Timeout on mirror2-houston.clearsdn.com/clearos/core/6/x86_64/repodata/primary.sqlite.bz2: (28, 'Operation too slow. Less than 1 bytes/sec transfered the last 30 seconds') Trying other mirror. mirror3-toronto.clearsdn.com/clearos/core/6/x86_64/repodata/primary.sqlite.bz2: [Errno 12] Timeout on mirror3-toronto.clearsdn.com/clearos/core/6/x86_64/repodata/primary.sqlite.bz2: (28, 'Operation too slow. Less than 1 bytes/sec transfered the last 30 seconds') Trying other mirror. mirror2-dallas.clearsdn.com/clearos/core/6/x86_64/repodata/primary.sqlite.bz2: [Errno 12] Timeout on mirror2-dallas.clearsdn.com/clearos/core/6/x86_64/repodata/primary.sqlite.bz2: (28, 'O*peration too slow. Less than 1 bytes/sec transfered the last 30 seconds'*) Trying other mirror. mirror2-dc.clearsdn.com/clearos/core/6/x86_64/repodata/primary.sqlite.bz2: [Errno 12] Timeout on mirror2-dc.clearsdn.com/clearos/core/6/x86_64/repodata/primary.sqlite.bz2: (28, 'Operation too slow. Less than 1 bytes/sec transfered the last 30 seconds') Trying other mirror. mirror1.timburgess.net/clearos/core/6/x86_64/repodata/primary.sqlite.bz2: [Errno 12] Timeout on mirror1.timburgess.net/clearos/core/6/x86_64/repodata/primary.sqlite.bz2: (28, 'Operation too slow. Less than 1 bytes/sec transfered the last 30 seconds') Trying other mirror. mirror3-toronto.clearsdn.com/clearos/core/6/x86_64/repodata/primary.sqlite.bz2: [Errno 12] Timeout on mirror3-toronto.clearsdn.com/clearos/core/6/x86_64/repodata/primary.sqlite.bz2: (28, 'Operation too slow. Less than 1 bytes/sec transfered the last 30 seconds') Trying other mirror. Error: failure: repodata/primary.sqlite.bz2 from clearos-core: [Errno 256] No more mirrors to try. How can i fix this.i am able to access repo through web,and it seems nothing wrong with the repo.Where can be the problem. Tried yum clean all but it also didnt help. Is there a way to fix it as i am not able to install any package in it.

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• Improving TCP performance over a gigabit network lots of connections and high traffic for storage and streaming services

  - by Linux Guy

  I have two servers, Both servers hardware Specification are Processor : Dual Processor RAM : over 128 G.B Hard disk : SSD Hard disk Outging Traffic bandwidth : 3 Gbps network cards speed : 10 Gbps Server A : for Encoding videos Server B : for storage videos andstream videos over web interface like youtube The inbound bandwidth between two servers is 10Gbps , the outbound bandwidth internet bandwidth is 500Mpbs Both servers using public ip addresses in public and private network Both servers transfer and connection on nginx port , and the server B used for streaming media , like youtube stream videos Both servers in same network , when i do ping from Server A to Server B i got high time latency above 1.0ms , the time range time=52.7 ms to time=215.7 ms - This is the output of iftop utility 353Mb 707Mb 1.04Gb 1.38Gb 1.73Gb mqqqqqqqqqqqqqqqqqqqqqqqqqqqvqqqqqqqqqqqqqqqqqqqqqqqqqqqvqqqqqqqqqqqqqqqqqqqqqqqqqqqvqqqqqqqqqqqqqqqqqqqqqqqqqqqvqqqqqqqqqqqqqqqqqqqqqqqqqqq server.example.com => ip.address 6.36Mb 4.31Mb 1.66Mb <= 158Kb 94.8Kb 35.1Kb server.example.com => ip.address 1.23Mb 4.28Mb 1.12Mb <= 17.1Kb 83.5Kb 21.9Kb server.example.com => ip.address 395Kb 3.89Mb 1.07Mb <= 6.09Kb 109Kb 28.6Kb server.example.com => ip.address 4.55Mb 3.83Mb 1.04Mb <= 55.6Kb 45.4Kb 13.0Kb server.example.com => ip.address 649Kb 3.38Mb 1.47Mb <= 9.00Kb 38.7Kb 16.7Kb server.example.com => ip.address 5.00Mb 3.32Mb 1.80Mb <= 65.7Kb 55.1Kb 29.4Kb server.example.com => ip.address 387Kb 3.13Mb 1.06Mb <= 18.4Kb 39.9Kb 15.0Kb server.example.com => ip.address 3.27Mb 3.11Mb 1.01Mb <= 81.2Kb 64.5Kb 20.9Kb server.example.com => ip.address 1.75Mb 3.08Mb 2.72Mb <= 16.6Kb 35.6Kb 32.5Kb server.example.com => ip.address 1.75Mb 2.90Mb 2.79Mb <= 22.4Kb 32.6Kb 35.6Kb server.example.com => ip.address 3.03Mb 2.78Mb 1.82Mb <= 26.6Kb 27.4Kb 20.2Kb server.example.com => ip.address 2.26Mb 2.66Mb 1.36Mb <= 51.7Kb 49.1Kb 24.4Kb server.example.com => ip.address 586Kb 2.50Mb 1.03Mb <= 4.17Kb 26.1Kb 10.7Kb server.example.com => ip.address 2.42Mb 2.49Mb 2.44Mb <= 31.6Kb 29.7Kb 29.9Kb server.example.com => ip.address 2.41Mb 2.46Mb 2.41Mb <= 26.4Kb 24.5Kb 23.8Kb server.example.com => ip.address 2.37Mb 2.39Mb 2.40Mb <= 28.9Kb 27.0Kb 28.5Kb server.example.com => ip.address 525Kb 2.20Mb 1.05Mb <= 7.03Kb 26.0Kb 12.8Kb qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq TX: cum: 102GB peak: 1.65Gb rates: 1.46Gb 1.44Gb 1.48Gb RX: 1.31GB 24.3Mb 19.5Mb 18.9Mb 20.0Mb TOTAL: 103GB 1.67Gb 1.48Gb 1.46Gb 1.50Gb I check the transfer speed using iperf utility From Server A to Server B # iperf -c 0.0.0.2 -p 8777 ------------------------------------------------------------ Client connecting to 0.0.0.2, TCP port 8777 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ [ 3] local 0.0.0.1 port 38895 connected with 0.0.0.2 port 8777 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.8 sec 528 KBytes 399 Kbits/sec My Current Connections in Server B # netstat -an|grep ":8777"|awk '/tcp/ {print $6}'|sort -nr| uniq -c 2072 TIME_WAIT 28 SYN_RECV 1 LISTEN 189 LAST_ACK 139 FIN_WAIT2 373 FIN_WAIT1 3381 ESTABLISHED 34 CLOSING Server A Network Card Information Settings for eth0: Supported ports: [ TP ] Supported link modes: 100baseT/Full 1000baseT/Full 10000baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Advertised link modes: 10000baseT/Full Advertised pause frame use: No Advertised auto-negotiation: Yes Speed: 10000Mb/s Duplex: Full Port: Twisted Pair PHYAD: 0 Transceiver: external Auto-negotiation: on MDI-X: Unknown Supports Wake-on: d Wake-on: d Current message level: 0x00000007 (7) drv probe link Link detected: yes Server B Network Card Information Settings for eth2: Supported ports: [ FIBRE ] Supported link modes: 10000baseT/Full Supported pause frame use: No Supports auto-negotiation: No Advertised link modes: 10000baseT/Full Advertised pause frame use: No Advertised auto-negotiation: No Speed: 10000Mb/s Duplex: Full Port: Direct Attach Copper PHYAD: 0 Transceiver: external Auto-negotiation: off Supports Wake-on: d Wake-on: d Current message level: 0x00000007 (7) drv probe link Link detected: yes ifconfig server A eth0 Link encap:Ethernet HWaddr 00:25:90:ED:9E:AA inet addr:0.0.0.1 Bcast:0.0.0.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1202795665 errors:0 dropped:64334 overruns:0 frame:0 TX packets:2313161968 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:893413096188 (832.0 GiB) TX bytes:3360949570454 (3.0 TiB) 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:2207544 errors:0 dropped:0 overruns:0 frame:0 TX packets:2207544 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:247769175 (236.2 MiB) TX bytes:247769175 (236.2 MiB) ifconfig Server B eth2 Link encap:Ethernet HWaddr 00:25:90:82:C4:FE inet addr:0.0.0.2 Bcast:0.0.0.2 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:39973046980 errors:0 dropped:1828387600 overruns:0 frame:0 TX packets:69618752480 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:3013976063688 (2.7 TiB) TX bytes:102250230803933 (92.9 TiB) 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:1049495 errors:0 dropped:0 overruns:0 frame:0 TX packets:1049495 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:129012422 (123.0 MiB) TX bytes:129012422 (123.0 MiB) Netstat -i on Server B # netstat -i Kernel Interface table Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg eth2 9000 0 42098629968 0 2131223717 0 73698797854 0 0 0 BMRU lo 65536 0 1077908 0 0 0 1077908 0 0 0 LRU I Turn up send/receive buffers on the network card to 2048 and problem still persist I increase the MTU for server A and problem still persist and i increase the MTU for server B for better connectivity and transfer speed but it couldn't transfer at all The problem is : as you can see from iperf utility, the transfer speed from server A to server B slow when i restart network service in server B the transfer in server A at full speed, after 2 minutes , it's getting slow How could i troubleshoot slow speed issue and fix it in server B ? Notice : if there any other commands i should execute in servers for more information, so it might help resolve the problem , let me know in comments

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• Encrypt remote linux server

  - by Margaret Thorpe

  One of my customers has requested that their web server is encrypted to prevent offline attacks to highly sensitive data contained in a mysql database and also /var/log. I have full root access to the dedicated server at a popular host. I am considering 3 options - FDE - This would be ideal, but with only remote access (no console) I imagine this would be very complex. Xen - installing XEN and moving their server within a XEN virtual machine and encrypting the VM - which seems easier to do remotely. Parition - encrypt the non-static partitions where the sensitive data resides e.g. /var /home etc. What would be the simplist approach that satisfies the requirements?

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• SSH running two commands at once?

  - by matthewsteiner

  So I want to run Apache benchmark but while it's running, I need to run htop to see the memory and CPU usage. How can I do that? Putty (My ssh client) won't let me type in a command until ab is done running. Ideas?

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• "Verifying DMI Pool" hang caused by raid array..

  - by Ling

  Hi Experts, I have a problem, I obtained a new server with 4 hard drives (2 500 gig, 2 two TB), and an adeptec RAID card. I arranged them in two arrays with RAID 1 (500 gigs together as primary and the 2 TB drives for lots of data). When both arrays are configured, the server hangs while booting at message "Verifying DMI Pool", however if I remove the second array from the configuration the server boots fine. I have checked they are both on different channels, I have disabled all other peripherals from the boot menu and ensured the hard drive is #1. I have booted into the linux rescue mode and checked that it is reading both arrays fine. What else could be causing these problems? Thanks

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• Apache umask 002 not changing permissions

  - by Master

  I have used [root ~]$ echo "umask 002" >> /etc/sysconfig/httpd [root ~]$ service httpd restart restarted apache many times but whenever i install something from script the directories are still not group writable. What should i do I have checked the file the umask 002 is at the end of file

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• apache on Cent OS opening default page on https

  - by Asghar

  I am new to apache and SSL and configuration, i got verysign certificte to secure my site. i have public, private and ca_intermediate cert files. i have configured ssl.conf as below VirtualHost _default_:443> DocumentRoot /var/www/mydomain.com/web/ ServerName mydomain.com:443 ServerAlias www.mydomain.com # Use separate log files for the SSL virtual host; note that LogLevel # is not inherited from httpd.conf. ErrorLog logs/ssl_error_log TransferLog logs/ssl_access_log LogLevel warn # SSL Engine Switch: # Enable/Disable SSL for this virtual host. SSLEngine on problem is that when i access www.mydoamin.com with "HTTP" it works fine, but when i access using "HTTPS" it just opens apache default page. but with green "HTTPS" means my certificates are installed correctly. How can i get rid of this situtaion. Thanks EDIT Output of apachectl -S -bash-3.2# apachectl -S [Mon Aug 27 10:20:19 2012] [warn] NameVirtualHost 82.56.29.189:80 has no VirtualHosts [Mon Aug 27 10:20:19 2012] [warn] NameVirtualHost 82.56.29.189:443 has no VirtualHosts VirtualHost configuration: wildcard NameVirtualHosts and _default_ servers: _default_:8081 localhost.localdomain (/etc/httpd/conf/sites-enabled/000-apps.vhost:10) *:8080 is a NameVirtualHost default server localhost.localdomain (/etc/httpd/conf/sites-enabled/000-ispconfig.vhost:10) port 8080 namevhost localhost.localdomain (/etc/httpd/conf/sites-enabled/000-ispconfig.vhost:10) *:443 is a NameVirtualHost default server mydomain.com (/etc/httpd/conf.d/ssl.conf:81) port 443 namevhost mydomain.com (/etc/httpd/conf.d/ssl.conf:81) *:80 is a NameVirtualHost default server app.mydomain.com (/etc/httpd/conf/sites-enabled/100-app.mydomain.com.vhost:7) port 80 namevhost app.mydomain.com (/etc/httpd/conf/sites-enabled/100-app.mydomain.com.vhost:7) port 80 namevhost mydomain.com (/etc/httpd/conf/sites-enabled/100-mydomain.com.vhost:7) Syntax OK

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• cannot move to a subdirectory of itself

  - by fire

  I have 2 folders: /home/sphinx/articlesdb/ and: /home/sphinx/tmp/articlesdb/ I want to move and overwrite all of the files from tmp into the main folder. I am currently using: mv -f /home/sphinx/tmp/articlesdb/ /home/sphinx/ But I get this error: mv: cannot move `/home/sphinx/tmp/articlesdb/' to a subdirectory of itself, `/home/sphinx/articlesdb' It needs to do this as fast as possible so I don't want to copy. Should I remove /home/sphinx/articlesdb/ completely and then run the mv command or do I just need to tweak the command slightly?

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• Puppet yum repo - Pull down 2.7.x vs 3.0.x

  - by Mike Purcell

  So a few weeks ago I started on the path to using puppet to automate all the configs/services. At the time I was using the EPEL repo, which installed version 2.6.x. After some reading I was trying to gain access to the flatten method available via the puppet stdlib, and thought it was available by default in the newer 2.7.x version. So I added a puppet repo with the following settings: [puppetlabs] name=Puppet Labs Packages baseurl=http://yum.puppetlabs.com/el/$releasever/products/$basearch/ enabled=1 gpgcheck=1 gpgkey=http://yum.puppetlabs.com/RPM-GPG-KEY-puppetlabs The problem with this, is it installed v3.0.x instead of 2.7.x. And apparently 3.0.x is a major upgrade which was released only a few weeks ago. Obviously I would prefer to use the 2.7.x for the next few months while PuppetLabs fix any defects which will inevitably arise after a major version. So my question is, what setting can I add to the puppet repo config to pull down only the 2.7.x branch and not the 3.0.x branch?

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• Exim redirect all unexisting accounts for local domains to a specific account

  - by tntu

  I want to route all incoming emails for local domains only to a single account if an account is not setup for that user. I would also like each email to be written in it's own file in user folder. I have a catchall user with /home/catchall/ path where I have a mail folder made for this but so far emails wither fail to deliver (thus my rule did not work) or they do deliver to /etc/mail/catchall file. I have been trying to put something together from the Exim configuration but so far nothing seem to work. http://exim.org/exim-html-current/doc/html/spec_html/ch20.html

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• How to install 64bit version of Mongodb

  - by slownage

  How can I install the 64bit (x86_64) version of MongoDB? I've specified in the 10gen.repo the 64bit: baseurl=http://downloads-distro.mongodb.org/repo/redhat/os/x86_64 But when I run: yum install mongo-10gen mongo-10gen-server It's the 32bit (see the i686) that it's set to be installed. Failed to set locale, defaulting to C Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: mirror.fdcservers.net * epel: mirror.steadfast.net * extras: mirror.fdcservers.net * rpmforge: mirror.rit.edu * updates: mirror.fdcservers.net 10gen | 951 B 00:00 Not using downloaded repomd.xml because it is older than what we have: Current : Tue Oct 30 15:55:02 2012 Downloaded: Tue Oct 30 15:54:51 2012 Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package mongo-10gen.i686 0:2.2.1-mongodb_1 will be installed ---> Package mongo-10gen-server.i686 0:2.2.1-mongodb_1 will be installed --> Finished Dependency Resolution Dependencies Resolved ====================================================================================================================================================== Package Arch Version Repository Size ====================================================================================================================================================== Installing: mongo-10gen i686 2.2.1-mongodb_1 10gen 42 M mongo-10gen-server i686 2.2.1-mongodb_1 10gen 6.5 M Transaction Summary ====================================================================================================================================================== Install 2 Package(s) Total download size: 48 M Installed size: 118 M I think I know why it want's to install the 32bit version: the first time I've made the 10gen.repo file I had in there the 32bit link specified, and installed the 32bit, which later I've deleted. Maybe something has been cached. Could someone help me out with this.

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• Testing UDP port connectivity

  - by Lock

  I am trying to test whether I can get to a particular port on a remote server (both of which I have access to) through UDP. Both servers are internet facing. I am using netcat to have a certain port listening. I then use nmap to check for that port to see if it is open, but it doesn't appear to be. Iptables is turned off. Any suggestions why this could be? I am eventually going to setup a VPN tunnel, but because I'm very new to tunnels, I want to make sure I have connectivity on port UDP 1194 before advancing.

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• df command show no output

  - by user119720

  I'm running the linux distro on my server.When i want to verify the size of the disk, i'm issuing this commnand to get the output. df -h But it does not produce ANY output.Strangely enough when i'm issuing other command such as fdisk -l or du -h it can show output normally. Does anyone now why is this happening?Thanks. edit: here is the output of cat /etc/fstab none /dev/pts devpts rw 0 0 and this is for mount command none on /dev/pts type devpts (rw) none on /proc/sys/fs/binfmt_misc tpe binfmt_misc (rw) edit(2): here is the output of cat /proc/mounts /dev/vzfs / vzfs rw,relatime,usrquota,grpquota 0 0 proc /proc proc rw,relatime 0 0 sysfs /sys sysfs rw,relatime 0 0 none /dev/tmpfs rw,relatime 0 0 none /dev/pts devpts rw,relatime 0 0 none /proc/sys/fs/binfmt_misc binfmt_msc rw,relatime 0 0

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• Including a PHP file that can be used with multiple sites

  - by Roland

  I have a web server that we use, apache, centos5, php I have a file called 'include.php' that I need to include in multiple sites. Eg. I have a site called testsite.co.za, now in the index.php i want to include the include.php file, the include.php is not in the root of testsite.co.za, Now i created another folder includes in the web root directory which contains include.php my code looks as follows in testsite.co.za/index.php require_once '../includes/include.php'; if i run testsite.co.za it can't detect include.php. Is there a certain server setting I need to change in order to include this file? My directory structureof -/var/www/html   -testsite.co.za       -index.php     -includes       -include.php Hope this makes sence

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• Java Class path problem in cent os..

  - by Ramesh

  I have installed java in centos5 classpath is not working .... my bash_profile export PATH=$PATH:/zzz/jdk1.6.0_03/bin/ export JAVA_HOME=/zzz/jdk1.6.0_03/bin/java/ export CLASSPATH=$CLASSPATH:/zzz/aa/mysql.jar:. java -version java version "1.6.0" OpenJDK Runtime Environment (build 1.6.0-b09) OpenJDK Server VM (build 1.6.0-b09, mixed mode)

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• nginx giving 404 when accessing php from alias directory

  - by code90

  I am trying to migrate from apache to nginx. The php sites that I am hosting need to access a shared library which turns out to be an alias directory. Below is the configuration I came up with. html files work fine, but php files giving 404. I have read through and tried most (if not all) of the answers to the similar questions with no any success. Any hint on what might be causing the issue in my case? location /wtlib/ { alias /var/www/shared/wtlib_4/; index index.php; } location ~ /wtlib/.*\.php$ { alias /var/www/shared/wtlib_4/; try_files $uri =404; if ($fastcgi_script_name ~ /wtlib(/.*\.php)$) { set $valid_fastcgi_script_name $1; } fastcgi_pass 127.0.0.1:9013; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /var/www/shared/wtlib_4$valid_fastcgi_script_name; fastcgi_param REDIRECT_STATUS 200; include /etc/nginx/fastcgi_params; } Thanks all ! Update: Following seems to be working fine: location /wtlib/ { alias /usr/share/php/wtlib_4/; location ~* .*\.php$ { try_files $uri @php_wtlib; } location ~* \.(html|htm|js|css|png|jpg|jpeg|gif|ico|pdf|zip|rar|air)$ { expires 7d; access_log off; } } location @php_wtlib { if ($fastcgi_script_name ~ /wtlib(/.*\.php)$) { set $valid_fastcgi_script_name $1; } fastcgi_pass $byr_pass; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /usr/share/php/wtlib_4$valid_fastcgi_script_name; fastcgi_param REDIRECT_STATUS 200; include /etc/nginx/fastcgi_params; }

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