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Re: [CentOS] How to change 'fstab' when you cannot boot the machine?
by Jason T. Slack-Moehrle 11 Apr '13

11 Apr '13

> why not try it out? > > as said: > ANY linux with a terminal is enough to mount the rootfs > and edit /ect/fstab with vi or whatever > > P.S: use the mailing-list instead off-list replies > > Am 12.04.2013 01:42, schrieb Jason T. Slack-Moehrle: > > If I have a CentOS 6.4 DVD is that the 'Rescue installed system' menu > option? > Sorry for the personal reply. An oversight. My hesitation with the 'Rescue installed system' sort of reminds me of Windows where this option will go and blindly copy new versions of files to a system to get it to boot. I wasn't sure what would happen if I selected this option from the DVD. I will try it now.

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Re: [CentOS] RAID 6 - opinions
by David C. Miller 11 Apr '13

11 Apr '13

----- Original Message ----- > From: "Reindl Harald" <h.reindl(a)thelounge.net> > To: "CentOS mailing list" <centos(a)centos.org> > Cc: "David C. Miller" <millerdc(a)fusion.gat.com> > Sent: Thursday, April 11, 2013 4:17:18 PM > Subject: Re: [CentOS] RAID 6 - opinions > > > > Am 12.04.2013 01:13, schrieb David C. Miller: > > dd if=/dev/zero of=/backup/5GB.img count=5000 bs=1M > > 5000+0 records in > > 5000+0 records out > > 5242880000 bytes (5.2 GB) copied, 10.8293 s, 484 MB/s > > aha, you have 16 GB RAM, write 5 GB to the disk which > is easily buffered into RAM and think this measures > anything? > > do the same with 32 GB instead 5 GB > > Good call, I did not even think about that. Here is a 31GB file write. dd if=/dev/zero of=/backup/30GB.img count=30000 bs=1M 30000+0 records in 30000+0 records out 31457280000 bytes (31 GB) copied, 78.041 s, 403 MB/s David.

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web collaboration packages.
by Jason T. Slack-Moehrle 11 Apr '13

11 Apr '13

Hello All, Try as I might, I cannot get Zimbra 8.0.3 to install on CentOS 6.4, even with --platform override. I followed some tutorials even that show the result working and nada. Can anyone suggest a good setup for e-mails erving, calendaring, web mail? Web mail is particularly important for my wife so she can check e-mail when she is at work. Jason

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floppy drives
by mark 11 Apr '13

11 Apr '13

Yes, really. I've got hundreds of the damn things here at home, and I want to go through them and get rid of them all. But... to do that I want to read them. I have both a 5.25" and a 3.5" drive, both are plugged in, but in the BIOS, all I see is the 3.5". Fine, I figure I'll take care of those. Nope. I see /dev/fd0 once I've booted up, but neither konqueror nor mount nor fdisk works - the latter telling me that /dev/fd0 is not a valid block device. After some googling, I tried modprobe floppy, which installed it, but still no joy. Anyone have a clue? mark

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CentOS-announce Digest, Vol 98, Issue 5
by centos-announce-request＠centos.org 11 Apr '13

11 Apr '13

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. CEBA-2013:0732 CentOS 5 glibc Update (Johnny Hughes) 2. CEBA-2013:0734 CentOS 5 esc Update (Johnny Hughes) 3. CEBA-2013:0735 CentOS 6 esc Update (Johnny Hughes) ---------------------------------------------------------------------- Message: 1 Date: Wed, 10 Apr 2013 19:28:49 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2013:0732 CentOS 5 glibc Update To: centos-announce(a)centos.org Message-ID: <20130410192849.GA25567(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2013:0732 Upstream details at : https://rhn.redhat.com/errata/RHBA-2013-0732.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 4db7f0ddb292c08ee3e380209cdd8308136d6ce30f552b63290e92b80a540a5a glibc-2.5-107.el5_9.1.i386.rpm 9067102b8ac1825ee50ef6fba732507429e8cea968b2747a868fe09da5ac4e2b glibc-2.5-107.el5_9.1.i686.rpm ca59b16a43aa5244fdcb44b14a928101d76d01230f8d614129c4da80cb8990df glibc-common-2.5-107.el5_9.1.i386.rpm 40d8e708341a0ecb2436cbb6b914261726b5377635e6cada32619fc3b74ef30d glibc-devel-2.5-107.el5_9.1.i386.rpm 3060f66eba6a6cea01f0ee24e1b96376062c740c7ec4f368374a6e48924724a9 glibc-headers-2.5-107.el5_9.1.i386.rpm 80ecdd22857d2fb9414852cf0efc93314324ee3e51d77d06e7100c7e7699e04e glibc-utils-2.5-107.el5_9.1.i386.rpm acf033dfb507f86cfc8fd090ae4fe0e9a22088dfb920b0ec68a75f8c1e1923cf nscd-2.5-107.el5_9.1.i386.rpm x86_64: 9067102b8ac1825ee50ef6fba732507429e8cea968b2747a868fe09da5ac4e2b glibc-2.5-107.el5_9.1.i686.rpm 662d1fceee8c2b4cb68304b778ba8900f71003769b79fb02b0be9ae918570be3 glibc-2.5-107.el5_9.1.x86_64.rpm f35415a4b902a00ec86e3645a35ac1a8b067c8a51c7a6db90fc2afe840826a83 glibc-common-2.5-107.el5_9.1.x86_64.rpm 40d8e708341a0ecb2436cbb6b914261726b5377635e6cada32619fc3b74ef30d glibc-devel-2.5-107.el5_9.1.i386.rpm 5d63400d62a4e5c8994d1d9a773119154790931223f081221337f9766257f293 glibc-devel-2.5-107.el5_9.1.x86_64.rpm db23fd79c60e6e3f90acb0319f216a2135fb0c5e25d19b98c77a84590e5669e7 glibc-headers-2.5-107.el5_9.1.x86_64.rpm ce0bf37712e3b486c635a3ead465326bdc02335c3a31804a794f687372a6073c glibc-utils-2.5-107.el5_9.1.x86_64.rpm 0001647c0dfb7825d2a1ecc32e37c4b10249208b8ed6cdcd77b6612297166009 nscd-2.5-107.el5_9.1.x86_64.rpm Source: c7a9bf801cafabcd527bd7619f8389333e9a909c53b9f9bc10fde19ca3e127df glibc-2.5-107.el5_9.1.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 2 Date: Wed, 10 Apr 2013 21:23:59 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2013:0734 CentOS 5 esc Update To: centos-announce(a)centos.org Message-ID: <20130410212359.GA31980(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2013:0734 Upstream details at : https://rhn.redhat.com/errata/RHBA-2013-0734.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 1dd83700f6d7dc2c5457475d26810d9c2b03fc828fd01736475170bc24487eb8 esc-1.1.0-14.el5.centos.1.i386.rpm x86_64: 5fb2cd5de0c08fafd15b1992a254e7bb357dc8b02537991cc19f1f2bf1d06eb7 esc-1.1.0-14.el5.centos.1.x86_64.rpm Source: 9487b089d041c395c57dddb0f75142a6249fffe261aea722a7e231a946775619 esc-1.1.0-14.el5.centos.1.src.rpm -- Johnny Hughes CentOS Project { http://www.centos.org/ } irc: hughesjr, #centos(a)irc.freenode.net ------------------------------ Message: 3 Date: Wed, 10 Apr 2013 22:47:32 +0000 From: Johnny Hughes <johnny(a)centos.org> Subject: [CentOS-announce] CEBA-2013:0735 CentOS 6 esc Update To: centos-announce(a)centos.org Message-ID: <20130410224732.GA4027(a)chakra.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Bugfix Advisory 2013:0735 Upstream details at : https://rhn.redhat.com/errata/RHBA-2013-0735.html The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename ) i386: 02774e31c54e68add6b8a0963b4aa3060fb488087da30c400c84bf6a8f339fe2 esc-1.1.0-25.el6.centos.1.i686.rpm x86_64: d56acd10070481335614b5a1bb413f0cf87e2bc62ea0186cb420478644a678e1 esc-1.1.0-25.el6.centos.1.x86_64.rpm Source: 0ca79f8310cdf46508327e3542a284a081b4bbe0167e01950232896c668a59df esc-1.1.0-25.el6.centos.1.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 98, Issue 5 **********************************************

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Formatting a USB Drive
by Jason T. Slack-Moehrle 11 Apr '13

11 Apr '13

Hi All, I have a Drobo, connected to a CentOS 6.4 box. The box sees it as /dev/sdg. I want to format it ext3 (as they dont support ext4) but when I try I get: # fdisk -u /dev/sdg WARNING: GPT (GUID Partition Table) detected on '/dev/sdg'! The util fdisk doesn't support GPT. Use GNU Parted. WARNING: The size of this disk is 17.6 TB (17592186044416 bytes). DOS partition table format can not be used on drives for volumes larger than (2199023255040 bytes) for 512-byte sectors. Use parted(1) and GUID partition table format (GPT). WARNING: DOS-compatible mode is deprecated. It's strongly recommended to switch off the mode (command 'c'). So I run: # parted GNU Parted 2.1 Using /dev/sda Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) select /dev/sdg Using /dev/sdg (parted) print Model: DROBO DroboPro (scsi) Disk /dev/sdg: 17.6TB Sector size (logical/physical): 512B/512B Partition Table: gpt Number Start End Size File system Name Flags (parted) and looking at an example of creating a partition: (parted) mkpart primary 106 16179 I dont know what to do next since I dont see any partitions listed. I dont know what do to for the start and end point, although the man page says "size in MB". Do I just say 0 to (and convert 16.0TB to MB? Yes, I know it says 17.6 TB but this model drobo can only support partitions up to 16tb without making a second partition. Can anyone provide some advice on that I am missing conceptually? Jason

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What about port 2048 for GRE(47) packaged in ip protocol
by yihect 11 Apr '13

11 Apr '13

Hi, all: I'm playing with Gre Tunnel programming in centos 6. I wrote my program in these steps: a, open /dev/net/tun device and ioctl with TUNSETIFF, get fd to tun device, say "tun0"; b, create one socket and use it to set tun0's ip address, namyly SIOCSIFADDR and SIOCSIFDSTADDR; and then turn it up; c, create one raw socket to send things which got from the tun0 device to other machine, and to receive packages which should be feeded into the tun0 device; Finally, I ran the program in two machines, say MA and MB, synchronously, and set route info in MA and MB too. The last environment is like this: 10.0.3.1/24 192.168.0.31/24 192.168.0.124/24 10.0.4.1/24 ---------- MA ------------------------------------------- MB ---------- tun0 eth0 eth0 tun0 When I ping MB in MA, and tcpdump eth0 in MA, I get: 15:06:39.712390 IP 192.168.0.31 > 192.168.0.124: GREv0, length 88: IP 10.0.3.1 > 10.0.4.1: ICMP echo request, id 28797, seq 1, length 64 15:06:39.713232 IP 192.168.0.124 > 192.168.0.31: ICMP 192.168.0.124 protocol 47 port 2048 unreachable, length 116 15:06:39.713667 IP 192.168.0.124 > 192.168.0.31: GREv0, length 88: IP 10.0.4.1 > 10.0.3.1: ICMP echo reply, id 28797, seq 1, length 64 15:06:39.713754 IP 192.168.0.31 > 192.168.0.124: ICMP 192.168.0.31 protocol 47 port 2048 unreachable, length 116 The 1st and 3rd lines is easy to understand, but what about the 2nd and 4th lines??? Is the raw package been sent up into gre protocol while caught by my program?? I have seen ICMP_PORT_UNREACH stuff been placed in ip_gre.c kernel code, but say it is "Impossible event". So, what's wrong, have I missed something in my program? Any suggestions are appreciated, thanks.

2 3

Virtual Machine Manager error
by Rajagopal Swaminathan 10 Apr '13

10 Apr '13

Greetings, I am getting the following error when I start the Virtual machine manager [root@centos Desktop]# uname -a Linux blah.blah.blah 2.6.32-220.2.1.el6.x86_64 #1 SMP Fri Dec 23 02:21:33 CST 2011 x86_64 x86_64 x86_64 GNU/Linux Error polling connection 'qemu:///system': internal error Cannot find suitable emulator for x86_64 Traceback (most recent call last): File "/usr/share/virt-manager/virtManager/engine.py", line 440, in _tick conn.tick() File "/usr/share/virt-manager/virtManager/connection.py", line 1414, in tick newNets, self.nets) = self._update_nets() File "/usr/share/virt-manager/virtManager/connection.py", line 1277, in _update_nets lookup_func, build_class) File "/usr/share/virt-manager/virtManager/connection.py", line 1209, in _poll_helper if not check_support(): File "/usr/share/virt-manager/virtManager/connection.py", line 501, in is_network_capable virtinst.support.SUPPORT_CONN_NETWORK) File "/usr/lib/python2.6/site-packages/virtinst/support.py", line 574, in check_conn_support return _check_support(conn, feature, conn) File "/usr/lib/python2.6/site-packages/virtinst/support.py", line 443, in _check_support actual_drv_ver = _hv_ver(conn, uri) File "/usr/lib/python2.6/site-packages/virtinst/support.py", line 376, in _hv_ver ret = cmd(*args) File "/usr/lib64/python2.6/site-packages/libvirt.py", line 2823, in getVersion if ret == -1: raise libvirtError ('virConnectGetVersion() failed', conn=self) libvirtError: internal error Cannot find suitable emulator for x86_64 any clues? TIA -- Regards, Rajagopal

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About centos fresh install
by Andrei Rolando León Salas 10 Apr '13

10 Apr '13

Hi, first of all i want to thank you all that do this help. Without this i cold never put my own webserver. Now my question. I know when i have to install some software, they recommend a "fresh" install of centos, but my provider (we have server via internet and webmin) every fresh install says that i need to pay like 50$ ( alittle expensive for me). Im live i Costa RIca and here internet sucks thats why i use panama server. Now my question is: theres any form to restore to "default" a centos server? like windows 8 or like norton goback? i searh a lot via google but not sure if theres no way or i dont know how to search it. Sorry for my bad english. Hope could help me this time

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Problem building powerdns from EPEL
by Nikolaos Milas 10 Apr '13

10 Apr '13

Hi, I just tried to build using http://dl.fedoraproject.org/pub/epel/6/SRPMS/pdns-3.1-2.el6.src.rpm on CentOS 6.4 final (kernel: 2.6.32-358.2.1.el6.x86_64), but it failed when looking for ldap libs: Note: I did not change anything in the original spec file. ... + ./configure --build=x86_64-redhat-linux-gnu --host=x86_64-redhat-linux-gnu --target=x86_64-redhat-linux-gnu --program-prefix= --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc --datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64 --libexecdir=/usr/libexec --localstatedir=/var --sharedstatedir=/var/lib --mandir=/usr/share/man --infodir=/usr/share/info --sysconfdir=/etc/pdns --libdir=/usr/lib64/pdns --disable-static --with-modules= --with-lua '--with-dynmodules= gmysql gpgsql pipe geo ldap gsqlite3' --enable-cryptopp ... checking for ldap_set_option in -lldap_r... no checking for ldap_set_option in -lldap... no configure: error: ldap library (libldap) not found However, libldap exists at the required place (/usr/lib64): $ ls -la /usr/lib64/ | grep ldap drwxr-xr-x. 4 root root 4096 Mar 11 16:06 evolution-openldap lrwxrwxrwx. 1 root root 10 Sep 21 2012 libldap-2.4.so.2 -> libldap.so -rw-r--r-- 1 root root 781914 Mar 20 15:57 libldapbackend.a -rwxr-xr-x 1 root root 1151 Mar 20 15:57 libldapbackend.la -rwxr-xr-x 1 root root 379419 Mar 20 15:57 libldapbackend.so lrwxrwxrwx. 1 root root 12 Sep 21 2012 libldap_r-2.4.so.2 -> libldap_r.so lrwxrwxrwx 1 root root 29 Mar 11 16:06 libldap_r.so -> /lib64/libldap_r-2.4.so.2.5.6 lrwxrwxrwx 1 root root 27 Mar 11 16:06 libldap.so -> /lib64/libldap-2.4.so.2.5.6 -rwxr-xr-x 1 root root 40320 Feb 22 09:49 libsmbldap.so.0 Here is the relevant part from config.log: ... configure:17992: checking for ldap_set_option in -lldap_r configure:18017: g++ -o conftest -D_GNU_SOURCE -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -DLDAP_DEPRECATED -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic conftest.cpp -lldap_r -lz >&5 /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../lib64/libldap_r.so: undefined reference to `ber_sockbuf_io_udp' collect2: ld returned 1 exit status ... configure:18033: checking for ldap_set_option in -lldap configure:18058: g++ -o conftest -D_GNU_SOURCE -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -DLDAP_DEPRECATED -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic conftest.cpp -lldap -lz >&5 /usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../lib64/libldap.so: undefined reference to `ber_sockbuf_io_udp' collect2: ld returned 1 exit status .... Am I doing something wrong? Why it can't find the ldap libraries? Please advise. Thanks, Nick

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