Discuss April 2010

discuss@lists.centos.org

265 participants
238 discussions

socket: write vs send
by Michael D. Berger 07 Apr '10

07 Apr '10

On CentOS 5.4, Linux 2.6.18-164.6.1.el5 #1 SMP Tue Nov 3 16:18:27 EST 2009 i686 i686 i386 GNU/Linux In man 2 send I find: The send() call may be used only when the socket is in a connected state (so that the intended recipient is known). The only difference between send() and write() is the presence of flags. With zero flags parameter, send() is equivalent to write(). In some complex server software, if the client disconnects: send: delivers errno == ECONNRESET but write: crashes the server process. So it is not really equivalent. Any thoughts on this? Thanks, Mike.

4 9

(no subject)
by Elmozamil Elamir 07 Apr '10

07 Apr '10

1 0

Backup KVM / Qemu on Virt-Manager
by Georghy 07 Apr '10

07 Apr '10

Hi guys, I have a CentOS system with virt-manager installed on it, the system is installed on a LVM partition with one PV for swap and one for "/", I only use KVM and qemu virtual machine on this server, I want to do a backup from my Virtual Machines on this server should I use LVM backup or an other stuff to do these backups ? what should I do ? stopping all VM before backup (I think) then do a LVM backup all help is appreciated -- Cordialement, / Greetings, Georghy FUSCO

2 1

Strange 'find' misbehaviour
by Niki Kovacs 07 Apr '10

07 Apr '10

Hi, I just found out something strange. Try it out for yourselves. Here goes. Search for any directories under /boot: # find /boot/ -type d /boot/ /boot/grub /boot/lost+found So far so good. Now execute a detailed listing on the results: # find /boot/ -type d -exec ls -l \{} \; total 6203 -rw-r--r-- 1 root root 68663 sep 3 2009 config-2.6.18-164.el5 drwxr-xr-x 2 root root 1024 avr 6 10:40 grub -rw------- 1 root root 3228842 avr 6 10:30 initrd-2.6.18-164.el5.img drwx------ 2 root root 12288 avr 6 10:19 lost+found -rw-r--r-- 1 root root 80032 mar 12 2009 message -rw-r--r-- 1 root root 107405 sep 3 2009 symvers-2.6.18-164.el5.gz -rw-r--r-- 1 root root 954947 sep 3 2009 System.map-2.6.18-164.el5 -rw-r--r-- 1 root root 1855924 sep 3 2009 vmlinuz-2.6.18-164.el5 total 257 -rw-r--r-- 1 root root 63 avr 6 10:40 device.map -rw-r--r-- 1 root root 7584 avr 6 10:40 e2fs_stage1_5 -rw-r--r-- 1 root root 7456 avr 6 10:40 fat_stage1_5 -rw-r--r-- 1 root root 6720 avr 6 10:40 ffs_stage1_5 -rw------- 1 root root 655 avr 6 10:40 grub.conf -rw-r--r-- 1 root root 6720 avr 6 10:40 iso9660_stage1_5 -rw-r--r-- 1 root root 8192 avr 6 10:40 jfs_stage1_5 lrwxrwxrwx 1 root root 11 avr 6 10:40 menu.lst -> ./grub.conf -rw-r--r-- 1 root root 6880 avr 6 10:40 minix_stage1_5 -rw-r--r-- 1 root root 9248 avr 6 10:40 reiserfs_stage1_5 -rw-r--r-- 1 root root 55808 mar 12 2009 splash.xpm.gz -rw-r--r-- 1 root root 512 avr 6 10:40 stage1 -rw-r--r-- 1 root root 104988 avr 6 10:40 stage2 -rw-r--r-- 1 root root 7072 avr 6 10:40 ufs2_stage1_5 -rw-r--r-- 1 root root 6272 avr 6 10:40 vstafs_stage1_5 -rw-r--r-- 1 root root 8904 avr 6 10:40 xfs_stage1_5 total 0 Why does 'find' suddenly list everything... and not just the directories? I'm puzzled. Niki

2 2

Kernel BUG
by Gilberto Nunes 07 Apr '10

07 Apr '10

3 5

how to upgrade gtk on centos 4.8
by Tommy Zong 07 Apr '10

07 Apr '10

Hello, My centos is 4.8 while I need gtk 2.8 or later. How to upgrade GTK? I'm trying to upgrade manually based on RPMs on 5.X, there are too many decencies when upgrading libX. Is there anybody can give some suggestion to enlighten me? Thanks. - Tommy

2 1

is there easy way to upgrade gtk on centos 4.8?
by Tommy Zong 07 Apr '10

07 Apr '10

Hello, I need to use wxPython-src-2.8.10.1 with GraphicContext support which requires gdk_cario_xxx APIs introduced from GTK 2.8. Is there any easy way to upgrade gtk since there are lots of dependences? I ever tried yum but it can not upgrade GTK. Thanks. - Tommy

1 0

(OT) OpenOffice.org calc chart strangeness.
by Bill Campbell 07 Apr '10

07 Apr '10

I am attempting to create a simple line chart graphing three columns from a soffice-calc spreadsheet. I expect it to take the leftmost column as the X-Axis, plotting the others on the Y-Axis, but it always creates an X-Axis of the row number in the columns, and the first column amongst the data. I have tried this on OpenOffice.org 3.2.0, NeoOffice(R) 3.0.2 Patch 2, iWork Pages, and Excel 12.2.4 in Microsoft Office 2008 for Mac. It does what I expect in iWork Pages and M$-Excel, but not in the various incantations of OpenOffice.org. I OO-calc has gone to a fancy wizard thingy that doesn't seem to have any way to specify details for the X-Axis, and I can't find anything useful in the on-line documentation. Does anybody know how one gets this to work in OpenOffice.org? The Linux tie-in is that I'm getting data from a postgresql database that lives on a Linux box, and none of the fancy commercial products seem to be able to use it in their data sources. On the other hand, I have written a python script that extracts the data from the postgresql database and creates the pretty reports using groff and gplot totally on Linux which is faster in any case for my current problem. Bill -- INTERNET: bill(a)celestial.com Bill Campbell; Celestial Software LLC URL: http://www.celestial.com/ PO Box 820; 6641 E. Mercer Way Voice: (206) 236-1676 Mercer Island, WA 98040-0820 Fax: (206) 232-9186 Skype: jwccsllc (206) 855-5792 Blessed are the young, for they shall inherit the national debt. -- Herbert Hoover

4 5

wifi
by Davy Leon 07 Apr '10

07 Apr '10

Hi folks I'm trying to use a Netgear WG111-2 USB-wifi adapter on a Centos 5.3 Box. Someone has done it? It seems not to be supported by the kernel. Thanks David

4 5

Disc Cloning Question
by Joseph L. Casale 07 Apr '10

07 Apr '10

I have a server with a stock install scheme with the exception that /boot and / are on two md raid 1 mirrors over two discs. I need to remove those two large discs and replace them with smaller discs. Given the lvm over md, and big to small scenario, anyone know any automated app that can do this? I don't want to spend the time to resize the ext3 partition, the vg etc and re-mirror manually... Thanks! jlc

3 7

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Discuss April 2010