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• Bidirectional real-time sync of large file tree between two distant linux servers

  - by dlo

  By large file tree I mean about 200k files, and growing all the time. A relatively small number of files are being changed in any given hour though. By bidirectional I mean that changes may occur on either server and need to be pushed to the other, so rsync doesn't seem appropriate. By distant I mean that the servers are both in data centers, but geographically remote from each other. Currently there are only 2 servers, but that may expand over time. By real-time, it's ok for there to be a little latency between syncing, but running a cron every 1-2 minutes doesn't seem right, since a very small fraction of files may change in any given hour, let alone minute. EDIT: This is running on VPS's so I might be limited on the kinds of kernel-level stuff I can do. Also, the VPS's are not resource-rich, so I'd shy away from solutions that require lots of ram (like Gluster?). What's the best / most "accepted" approach to get this done? This seems like it would be a common need, but I haven't been able to find a generally accepted approach yet, which was surprising. (I'm seeking the safety of the masses. :) I've come across lsyncd to trigger a sync at the filesystem change level. That seems clever though not super common, and I'm a bit confused by the various lsyncd approaches. There's just using lsyncd with rsync, but it seems this could be fragile for bidirectionality since rsync doesn't have a notion of memory (eg- to know whether a deleted file on A should be deleted on B or whether it's a new file on B that should be copied to A). lipsync appears to be just a lsyncd+rsync implementation, right? Then there's using lsyncd with csync2, like this: http://www.axivo.com/community/threads/lightning-fast-synchronization-with-csync2-and-lsyncd.121/ ... I'm leaning towards this approach, but csync2 is a little quirky, though I did do a successful test of it. I'm mostly concerned that I haven't been able to find a lot of community confirmation of this method. People on here seem to like Unison a lot, but it seems that it is no longer under active development and it's not clear that it has an automatic trigger like lsyncd. I've seen Gluster mentioned, but maybe overkill for what I need? UPDATE: fyi- I ended up going with the original solution I mentioned: lsyncd+csync2. It seems to work quite well, and I like the architectural approach of having the servers be very loosely joined, so that each server can operate indefinitely on its own regardless of the link quality between them.

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• How to enable CDR on AsteriskNow 1.5

  - by Michal Niklas

  I have upgraded PBX to Asterisk 1.6.2.7 and now CDR files are not created. It looks that such logging is disabled: Connected to Asterisk 1.6.2.7 currently running on pbx2 (pid = 5824) Verbosity is at least 3 pbx2*CLI> cdr show status pbx2*CLI> Call Detail Record (CDR) settings ---------------------------------- Logging: Disabled Mode: Simple Asterisk shows that CDR modules are loaded: pbx2*CLI> module show like cd Module Description Use Count cdr_manager.so Asterisk Manager Interface CDR Backend 0 cdr_csv.so Comma Separated Values CDR Backend 0 app_cdr.so Tell Asterisk to not maintain a CDR for 0 app_forkcdr.so Fork The CDR into 2 separate entities 0 func_cdr.so Call Detail Record (CDR) dialplan functi 0 cdr_custom.so Customizable Comma Separated Values CDR 0 6 modules loaded How to enable creating CDR csv files?

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• Need to make a scheduled task run as another user but keep the current user’s environment

  - by Chad Marmon

  I need to backup users .pst files. The current method I am trying is making a shadow copy using Diskshadow. My script works great all but Diskshadow needs to be ran as administrator but also needs to retain the logged-on user's environment variables; specifically, the %USERNAME% and %HOMESHARE% variables so the right user’s files get copied up to the right network location. I have for the most part got this to work), but there’s no straightforward (or secure, at least) way to pass the password. If I set up a scheduled task to run the script as a domain user with local admin privs, the environment variables get lost. I need to run this script automagically so that there should be no user interaction. If I could figure out how to make a scheduled task run as another user but keep the current user’s environment, I think this would work, but I’ve been beating my head against that for a while now, without any luck.

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• Saving a modified InfoPath form to its form library

  - by Nathan Lykken

  Within our corporate SharePoint 2007 site, there is a particular form library that contains 10 separate files. 9 of these are either Excel, Word, or PowerPoint files and one of these is an InfoPath 2007 form that serves as a report. After noticing an error within this InfoPath form, I saved this InfoPath form to my local directory and then, within the design mode of InfoPath, I modified this InfoPath form. What is the proper way to save this modified InfoPath form to its form library? Everything that I have tried results in nobody except myself having access to this modified InfoPath form. I can open this InfoPath form without error but when my coworkers try to open this InfoPath form on their machines, they receive this error: “The form cannot be opened because it requires the domain permission level and it currently has restricted permission. To fix this problem, open the form from the location it was published to."

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• .htaccess to block by file name possible?

  - by Tiffany Walker

  I have a bunch of files that are secure_xxxxxx.php. Is there a way to use .htaccess to block access to all the secure_* php files based on IP? EDIT: I've tried but I get 500 errors <FilesMatch "^secure_.*\.php$"> order deny all deny from all allow from my ip here </FilesMatch> Don't see any errors in apache error logs either httpd -M Loaded Modules: core_module (static) authn_file_module (static) authn_default_module (static) authz_host_module (static) authz_groupfile_module (static) authz_user_module (static) authz_default_module (static) auth_basic_module (static) include_module (static) filter_module (static) log_config_module (static) logio_module (static) env_module (static) expires_module (static) headers_module (static) setenvif_module (static) version_module (static) proxy_module (static) proxy_connect_module (static) proxy_ftp_module (static) proxy_http_module (static) proxy_scgi_module (static) proxy_ajp_module (static) proxy_balancer_module (static) ssl_module (static) mpm_prefork_module (static) http_module (static) mime_module (static) dav_module (static) status_module (static) autoindex_module (static) asis_module (static) info_module (static) suexec_module (static) cgi_module (static) dav_fs_module (static) negotiation_module (static) dir_module (static) actions_module (static) userdir_module (static) alias_module (static) rewrite_module (static) so_module (static) fastinclude_module (shared) auth_passthrough_module (shared) bwlimited_module (shared) frontpage_module (shared) suphp_module (shared) Syntax OK

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• LINKED TABLES BETWEEN MS ACCESS 2003 AND MS ACCESS 2007-WRITE PERMISSIONS DENIED

  - by STEVE KING

  We are in the process of switching over to ACCESS 2007. We have numerous data tables in ACCESS 2003 files. In one case, the user has 2007 on his PC and opend the front end in 2007. No problems. When the the user is done, he clicks a button that executes a macro full of update queries. The macro reaches the first query and halts. We get a messge saying we do not have permisons to write to this linked table (2003 format). There were no security files involved. We re-linked from 2007, same problem. LAN permssions were ok. I wound up having to import the tables to front end in order for the user to be able to do his job.

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• GRUB doesn't recognize partitions on one harddisk

  - by knizz

  I have a dualboot computer with Windows Vista (on hd0) and Ubuntu 9.10. The bootloader is GRUB and the windows bootloader lets me decide between Vista and Ubuntu-Installation (broken WuBi). But now (i don't know why that changed) I can't use start the windows-bootloader anymore. I tried "ls" on the grub-prompt and it gave me a list like: (hd0) (hd1) (hd1,0) (hd1,1) (hd1,2) ... (fd0) It recognizes all partitions of hd1 (the ubuntu-harddisk) but not of hd0(the win-disk). .. WHY? Here is the result of the "boot info script" for the technical details: Boot Info Script 0.55 dated February 15th, 2010 ============================= Boot Info Summary: ============================== => Grub 2 is installed in the MBR of /dev/sda and looks for (UUID=a7c510e3-2399-437b-ab92-fa609e48d63f)/boot/grub. => No boot loader is installed in the MBR of /dev/sdb sda1: _________________________________________________________________________ File system: ntfs Boot sector type: Windows Vista/7 Boot sector info: No errors found in the Boot Parameter Block. Operating System: Windows Vista Boot files/dirs: /bootmgr /Boot/BCD /Windows/System32/winload.exe /wubildr.mbr /wubildr sda2: _________________________________________________________________________ File system: ntfs Boot sector type: Windows Vista/7 Boot sector info: No errors found in the Boot Parameter Block. Operating System: Boot files/dirs: sdb1: _________________________________________________________________________ File system: Boot sector type: Unknown Boot sector info: Mounting failed: mount: unbekannter Dateisystemtyp „“ sdb2: _________________________________________________________________________ File system: ntfs Boot sector type: Windows Vista/7 Boot sector info: No errors found in the Boot Parameter Block. Operating System: Boot files/dirs: sdb3: _________________________________________________________________________ File system: Bios Boot Partition Boot sector type: - Boot sector info: sdb4: _________________________________________________________________________ File system: ext4 Boot sector type: - Boot sector info: Operating System: Ubuntu 9.10 Boot files/dirs: /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img sdb5: _________________________________________________________________________ File system: swap Boot sector type: - Boot sector info: =========================== Drive/Partition Info: ============================= Drive: sda ___________________ _____________________________________________________ Platte /dev/sda: 640.1 GByte, 640135028736 Byte 255 Köpfe, 63 Sektoren/Spuren, 77825 Zylinder, zusammen 1250263728 Sektoren Einheiten = Sektoren von 1 × 512 = 512 Bytes Disk identifier: 0x52554d66 Partition Boot Start End Size Id System /dev/sda1 * 2,048 307,202,047 307,200,000 7 HPFS/NTFS /dev/sda2 307,202,048 1,250,258,943 943,056,896 7 HPFS/NTFS Drive: sdb ___________________ _____________________________________________________ Platte /dev/sdb: 640.1 GByte, 640135028736 Byte 255 Köpfe, 63 Sektoren/Spuren, 77825 Zylinder, zusammen 1250263728 Sektoren Einheiten = Sektoren von 1 × 512 = 512 Bytes Disk identifier: 0x00000000 Partition Boot Start End Size Id System /dev/sdb1 1 1,250,263,727 1,250,263,727 ee GPT GUID Partition Table detected. Partition Start End Size System /dev/sdb1 34 262,177 262,144 Microsoft Windows /dev/sdb2 262,178 1,131,253,933 1,130,991,756 Linux or Data /dev/sdb3 1,131,253,934 1,131,255,887 1,954 Bios Boot Partition /dev/sdb4 1,131,255,888 1,245,312,528 114,056,641 Linux or Data /dev/sdb5 1,245,312,529 1,250,263,694 4,951,166 Linux Swap blkid -c /dev/null: ____________________________________________________________ Device UUID TYPE LABEL /dev/sda1 AE1440441440122F ntfs /dev/sda2 3AE66E4DE66E0A09 ntfs data /dev/sdb2 5419D16119DAA4DE ntfs LaufwerkD /dev/sdb4 a7c510e3-2399-437b-ab92-fa609e48d63f ext4 /dev/sdb5 60a0143a-e01b-450a-bbd1-f22059e47b65 swap ============================ "mount | grep ^/dev output: =========================== Device Mount_Point Type Options /dev/sdb4 / ext4 (rw,errors=remount-ro) =========================== sdb4/boot/grub/grub.cfg: =========================== # # DO NOT EDIT THIS FILE # # It is automatically generated by /usr/sbin/grub-mkconfig using templates # from /etc/grub.d and settings from /etc/default/grub # ### BEGIN /etc/grub.d/00_header ### if [ -s /boot/grub/grubenv ]; then have_grubenv=true load_env fi set default="0" if [ ${prev_saved_entry} ]; then saved_entry=${prev_saved_entry} save_env saved_entry prev_saved_entry= save_env prev_saved_entry fi insmod ext2 set root=(hd1,4) search --no-floppy --fs-uuid --set a7c510e3-2399-437b-ab92-fa609e48d63f if loadfont /usr/share/grub/unicode.pf2 ; then set gfxmode=640x480 insmod gfxterm insmod vbe if terminal_output gfxterm ; then true ; else # For backward compatibility with versions of terminal.mod that don't # understand terminal_output terminal gfxterm fi fi if [ ${recordfail} = 1 ]; then set timeout=-1 else set timeout=10 fi ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/05_debian_theme ### set menu_color_normal=white/black set menu_color_highlight=black/white ### END /etc/grub.d/05_debian_theme ### ### BEGIN /etc/grub.d/10_linux ### menuentry "Ubuntu, Linux 2.6.31-20-generic" { recordfail=1 if [ -n ${have_grubenv} ]; then save_env recordfail; fi set quiet=1 insmod ext2 set root=(hd1,4) search --no-floppy --fs-uuid --set a7c510e3-2399-437b-ab92-fa609e48d63f linux /boot/vmlinuz-2.6.31-20-generic root=UUID=a7c510e3-2399-437b-ab92-fa609e48d63f ro quiet splash initrd /boot/initrd.img-2.6.31-20-generic } menuentry "Ubuntu, Linux 2.6.31-20-generic (recovery mode)" { recordfail=1 if [ -n ${have_grubenv} ]; then save_env recordfail; fi insmod ext2 set root=(hd1,4) search --no-floppy --fs-uuid --set a7c510e3-2399-437b-ab92-fa609e48d63f linux /boot/vmlinuz-2.6.31-20-generic root=UUID=a7c510e3-2399-437b-ab92-fa609e48d63f ro single initrd /boot/initrd.img-2.6.31-20-generic } menuentry "Ubuntu, Linux 2.6.31-14-generic" { recordfail=1 if [ -n ${have_grubenv} ]; then save_env recordfail; fi set quiet=1 insmod ext2 set root=(hd1,4) search --no-floppy --fs-uuid --set a7c510e3-2399-437b-ab92-fa609e48d63f linux /boot/vmlinuz-2.6.31-14-generic root=UUID=a7c510e3-2399-437b-ab92-fa609e48d63f ro quiet splash initrd /boot/initrd.img-2.6.31-14-generic } menuentry "Ubuntu, Linux 2.6.31-14-generic (recovery mode)" { recordfail=1 if [ -n ${have_grubenv} ]; then save_env recordfail; fi insmod ext2 set root=(hd1,4) search --no-floppy --fs-uuid --set a7c510e3-2399-437b-ab92-fa609e48d63f linux /boot/vmlinuz-2.6.31-14-generic root=UUID=a7c510e3-2399-437b-ab92-fa609e48d63f ro single initrd /boot/initrd.img-2.6.31-14-generic } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_memtest86+ ### menuentry "Memory test (memtest86+)" { linux16 /boot/memtest86+.bin } menuentry "Memory test (memtest86+, serial console 115200)" { linux16 /boot/memtest86+.bin console=ttyS0,115200n8 } ### END /etc/grub.d/20_memtest86+ ### ### BEGIN /etc/grub.d/30_os-prober ### menuentry "Windows Vista (loader) (on /dev/sda1)" { insmod ntfs set root=(hd0,1) search --no-floppy --fs-uuid --set ae1440441440122f chainloader +1 } ### END /etc/grub.d/30_os-prober ### ### BEGIN /etc/grub.d/40_custom ### # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. ### END /etc/grub.d/40_custom ### =============================== sdb4/etc/fstab: =============================== # /etc/fstab: static file system information. # # Use 'blkid -o value -s UUID' to print the universally unique identifier # for a device; this may be used with UUID= as a more robust way to name # devices that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc defaults 0 0 # / was on /dev/sdb4 during installation UUID=a7c510e3-2399-437b-ab92-fa609e48d63f / ext4 errors=remount-ro 0 1 # swap was on /dev/sdb5 during installation UUID=60a0143a-e01b-450a-bbd1-f22059e47b65 none swap sw 0 0 /dev/scd0 /media/cdrom0 udf,iso9660 user,noauto,exec,utf8 0 0 /dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0 =================== sdb4: Location of files loaded by Grub: =================== 583.8GB: boot/grub/core.img 583.8GB: boot/grub/grub.cfg 579.7GB: boot/initrd.img-2.6.31-14-generic 580.0GB: boot/initrd.img-2.6.31-20-generic 579.7GB: boot/vmlinuz-2.6.31-14-generic 579.8GB: boot/vmlinuz-2.6.31-20-generic 580.0GB: initrd.img 579.7GB: initrd.img.old 579.8GB: vmlinuz 579.7GB: vmlinuz.old =========================== Unknown MBRs/Boot Sectors/etc ======================= Unknown BootLoader on sdb1 00000000 54 34 dc 3b 8b ff 6c fa 3e 59 3d 24 25 af 5f 9b |T4.;..l.>Y=$%._.| 00000010 72 f8 36 3d 56 30 22 fd c6 08 5e 39 7f dc 29 48 |r.6=V0"...^9..)H| 00000020 48 e5 24 52 77 b0 fc 64 b6 ce 48 c3 07 ce b5 81 |H.$Rw..d..H.....| 00000030 06 68 60 4f 6e fb 83 92 df 3a 54 b9 df 21 2a cd |.h`On....:T..!*.| 00000040 1e 2f e2 49 fe cf 81 2d 52 17 1a 4e 66 b4 f3 f0 |./.I...-R..Nf...| 00000050 41 25 e3 96 26 28 fe 19 61 72 75 f8 40 a3 b7 ef |A%..&(..aru.@...| 00000060 5f 79 dc cb 28 44 44 7c 9b 9a 7b 6c 4b 4b 60 0f |_y..(DD|..{lKK`.| 00000070 a9 97 87 bc 85 9f db bb d2 1a 88 9f aa 49 18 d5 |.............I..| 00000080 92 2d db 7e fe f7 8d 7a 18 c0 33 c5 bd 7a 46 07 |.-.~...z..3..zF.| 00000090 c8 27 13 66 94 49 62 9f bc 99 56 55 25 fb 94 a9 |.'.f.Ib...VU%...| 000000a0 3f b2 a7 0a 87 d0 a4 4e 51 f1 09 02 c4 29 eb ff |?......NQ....)..| 000000b0 26 3b 51 3e 5a 0c db ee a6 57 a7 c3 ba a1 74 90 |&;Q>Z....W....t.| 000000c0 ee 70 08 18 cc b8 d0 22 ce 96 c7 cb 68 40 98 20 |.p....."....h@. | 000000d0 49 3d 07 ec df d1 8d cf 19 bc 42 90 70 24 01 b4 |I=........B.p$..| 000000e0 28 cf c6 50 d3 95 5a 1b 18 15 33 c7 b2 a8 95 92 |(..P..Z...3.....| 000000f0 bb 93 fe 18 2b 81 c1 6b 9c 30 f1 65 50 6a 80 3d |....+..k.0.ePj.=| 00000100 74 37 a8 59 a6 51 8a 63 b6 d8 16 9f a9 47 2a 7c |t7.Y.Q.c.....G*|| 00000110 04 a7 fe 69 47 02 bf e9 b7 1b 7a ea 60 5c 3c 53 |...iG.....z.`\<S| 00000120 5b 10 78 dc 4d d2 a8 22 30 45 37 fb 56 06 9f 06 |[.x.M.."0E7.V...| 00000130 aa df cf 87 3a 3e cf 72 f2 e5 a6 c6 aa e2 7c 1c |....:>.r......|.| 00000140 64 c2 fc 80 ce 02 fc 7f 0f c6 60 81 bf cd 3b 5a |d.........`...;Z| 00000150 37 a5 38 1b 0c 1b 39 2e d6 f6 3d a2 36 e5 87 c3 |7.8...9...=.6...| 00000160 17 b5 fd ee 33 c7 ce a3 d9 c2 57 dc ee 85 48 9d |....3.....W...H.| 00000170 33 60 02 cd c5 83 44 44 ea b6 07 25 0a 4b a6 6e |3`....DD...%.K.n| 00000180 fc 51 42 cd 84 0b 65 b6 19 a1 e5 b2 eb 14 0c fa |.QB...e.........| 00000190 24 77 f5 44 6e 5d 39 dd b6 8e cc f8 30 fe 21 46 |$w.Dn]9.....0.!F| 000001a0 9c ff 95 c6 c7 b5 0a df 54 ca d2 ac bc 64 d0 97 |........T....d..| 000001b0 94 54 d9 29 0f 91 60 20 c3 e4 53 c2 b0 e4 40 72 |.T.)..` ..S...@r| 000001c0 7e 25 bc 81 06 ad 05 46 14 a7 e6 71 6b 5c db 9c |~%.....F...qk\..| 000001d0 0a 5e 76 23 ae 06 01 36 98 21 65 2c 90 e7 4b 1a |.^v#...6.!e,..K.| 000001e0 2a 2d 80 a5 48 db 9e 14 e0 9f e9 aa 00 e3 77 32 |*-..H.........w2| 000001f0 0f fd 94 db 55 a6 64 46 be ae ca de da ee 89 68 |....U.dF.......h| 00000200 =======Devices which don't seem to have a corresponding hard drive============== sdc sdd sde

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• How to fix corrupted filesystem (shows as RAW) in USB device?

  - by Erico Yan

  I would like to ask if you know how to fix a corrupted USB? I've tried the diskpart command but it didn't work. The media is write protected. Do you have any idea that is much better? I need to fix it because I have important files in my flash drive. I really need to retrieve it. I saw that the file system is seen as RAW and is unaccessible. I tried error checking, but it requires you to format it. I tried data recovery software but all files come out corrupted. My USB is Imation 4GB. Any suggestions?

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• Snow Leopard tzdata

  - by pgb

  I live in Argentina, and our DST rules change often. So often, that major OS' tend to ship with an old version of tzdata DBs. In the past, I successfully updated the time zone databases in Tiger and Leopard. Today, however, when trying to update it in Snow Leopard, it did not work. Not only it failed, but now even after I reverted my changes, there seems to be some "cache" where the time zone information was retained. The files I updated (and reverted) are located at: /usr/share/zoneinfo and /usr/share/icu. To update those, I grabbed Apple's source code for ICU and recompiled it's database using the latest tzdata file (2010b). Then, I recompiled the tzinfo by running zic, and copied all the files to the system folders. Does anyone have experience dealing with Snow Leopard's timezone DB and can help? Thank you.

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• Benchmarking hosting providers IO with Bonnie

  - by Derek Organ

  Ok, because of a bunch of projects I'm working on I've access to dedicated Servers on a 3 hosting providers. As an experiment and for educational purposes I decided to see if I could benchmark how good the IO is with each. Bit of research lead me to Bonnie++ So I installed it on the server and ran this simple command /usr/sbin/bonnie -d /tmp/foo The 3 machines in different hosting providers are all dedicated machines, one is a VPS, other two are on some cloud platform e.g. VMWare / Xen using some kind of clustered SAN for storage This might be a naive thing to do but here are the results I found. HOST A Version 1.03c ------Sequential Output------ --Sequential Input- --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP xxxxxxxxxxxxxxxx 1G 45081 88 56244 14 19167 4 20965 40 67110 6 67.2 0 ------Sequential Create------ --------Random Create-------- -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP 16 15264 28 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++ xxxxxxxx,1G,45081,88,56244,14,19167,4,20965,40,67110,6,67.2,0,16,15264,28,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++ HOST B Version 1.03d ------Sequential Output------ --Sequential Input- --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP xxxxxxxxxxxx 4G 43070 91 64510 15 19092 0 29276 47 39169 0 448.2 0 ------Sequential Create------ --------Random Create-------- -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP 16 24799 52 +++++ +++ +++++ +++ 25443 54 +++++ +++ +++++ +++ xxxxxxx,4G,43070,91,64510,15,19092,0,29276,47,39169,0,448.2,0,16,24799,52,+++++,+++,+++++,+++,25443,54,+++++,+++,+++++,+++ HOST C Version 1.03c ------Sequential Output------ --Sequential Input- --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP xxxxxxxxxxxxx 1536M 15598 22 85698 13 258969 20 16194 22 723655 21 +++++ +++ ------Sequential Create------ --------Random Create-------- -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP 16 14142 22 +++++ +++ 18621 22 13544 22 +++++ +++ 17363 21 xxxxxxxx,1536M,15598,22,85698,13,258969,20,16194,22,723655,21,+++++,+++,16,14142,22,+++++,+++,18621,22,13544,22,+++++,+++,17363,21 Ok, so first off what is the best way to read the figures and are there any issues with really comparing these numbers? Is this in any way a true representation of IO Speed? If not is there any way for me to test that? Note: these 3 machines are using either Ubuntu or Debian (I presume that doesn't really matter)

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• Logrotate not doing any rotation

  - by blizz

  I just set up LogRotate on my RHEL6 server so that it rotates my custom Apache log files. However, it doesn't do anything when i try manually running it. I expect it to rotate the log files "access.log" and "err.log". They have been there for a few days and need to be rotated. Here is the output: [root@pc1 httpd]# logrotate -d -f /etc/logrotate.d/apache reading config file /etc/logrotate.d/apache reading config info for /var/log/httpd/*log /var/www/html/NSLogs/access.log /var/www/html/NSErrorLogs/err.log Handling 1 logs rotating pattern: /var/log/httpd/*log /var/www/html/NSLogs/access.log /var/www/html/NSErrorLogs/err.log forced from command line (no old logs will be kept) empty log files are rotated, old logs are removed considering log /var/log/httpd/access_log log needs rotating considering log /var/log/httpd/error_log log needs rotating considering log /var/www/html/NSLogs/access.log log needs rotating considering log /var/www/html/NSErrorLogs/err.log log needs rotating rotating log /var/log/httpd/access_log, log->rotateCount is 0 dateext suffix '-20131023' glob pattern '-[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]' glob finding old rotated logs failed fscreate context set to unconfined_u:object_r:httpd_log_t:s0 renaming /var/log/httpd/access_log to /var/log/httpd/access_log-20131023 disposeName will be /var/log/httpd/access_log-20131023.gz running postrotate script running script with arg /var/log/httpd/access_log: " /usr/bin/killall -HUP httpd " compressing log with: /bin/gzip removing old log /var/log/httpd/access_log-20131023.gz error: error opening /var/log/httpd/access_log-20131023.gz: No such file or directory rotating log /var/log/httpd/error_log, log->rotateCount is 0 dateext suffix '-20131023' glob pattern '-[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]' glob finding old rotated logs failed fscreate context set to unconfined_u:object_r:httpd_log_t:s0 renaming /var/log/httpd/error_log to /var/log/httpd/error_log-20131023 disposeName will be /var/log/httpd/error_log-20131023.gz running postrotate script running script with arg /var/log/httpd/error_log: " /usr/bin/killall -HUP httpd " compressing log with: /bin/gzip removing old log /var/log/httpd/error_log-20131023.gz error: error opening /var/log/httpd/error_log-20131023.gz: No such file or directory rotating log /var/www/html/NSLogs/access.log, log->rotateCount is 0 dateext suffix '-20131023' glob pattern '-[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]' glob finding old rotated logs failed fscreate context set to unconfined_u:object_r:httpd_sys_rw_content_t:s0 renaming /var/www/html/NSLogs/access.log to /var/www/html/NSLogs/access.log-20131023 disposeName will be /var/www/html/NSLogs/access.log-20131023.gz running postrotate script running script with arg /var/www/html/NSLogs/access.log: " /usr/bin/killall -HUP httpd " compressing log with: /bin/gzip removing old log /var/www/html/NSLogs/access.log-20131023.gz error: error opening /var/www/html/NSLogs/access.log-20131023.gz: No such file or directory rotating log /var/www/html/NSErrorLogs/err.log, log->rotateCount is 0 dateext suffix '-20131023' glob pattern '-[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]' glob finding old rotated logs failed fscreate context set to unconfined_u:object_r:httpd_sys_rw_content_t:s0 renaming /var/www/html/NSErrorLogs/err.log to /var/www/html/NSErrorLogs/err.log-20131023 disposeName will be /var/www/html/NSErrorLogs/err.log-20131023.gz running postrotate script running script with arg /var/www/html/NSErrorLogs/err.log: " /usr/bin/killall -HUP httpd " compressing log with: /bin/gzip removing old log /var/www/html/NSErrorLogs/err.log-20131023.gz error: error opening /var/www/html/NSErrorLogs/err.log-20131023.gz: No such file or directory

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• rsync set group owner, group permission

  - by ChrisInEdmonton

  I want to use rsync to transfer files from my computer to a remote Linux system. Regardless of the local file's group ownership, I want to set these values on the remote side. If I was on the remote Linux system, I could create the directory and set the ownership and permissions as: mkdir my_directory chown :my_group my_directory chmod 775 my_directory If I create the directory locally and then use rsync (remember, I don't have my_group locally), I do: rsync -ae ssh --chmod=ug+rw,Dug+rwx my_directory remoteserver:dest That works, but I cannot figure out how to set the group owner through rsync. If I do a chmod g+s dest, my_directory has the correct group owner but all of the files inside have the incorrect group owner.

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• When using grep from VIM, how to jump to results?

  - by Marplesoft

  When using the grep plugin to VIM, I can search the current directory for all occurrences of a string within a set of files, like this: :grep Ryan *.txt This outputs something like this: file1.txt:3:Ryan was here file2.txt:10:Ryan likes VIM file3.txt:5:superuser.com is a fav of Ryan (1 of 3): Ryan was here Press ENTER or type command to continue If I press enter, it just takes me back to my editor. What I really want to do is be able to open up one of those files and jump to the place where the string was found. Is there a way to do this? The 1 of 3 part makes me think there's a way to tab through the results, but I don't know what commands are available to me. Can anybody shed some light on this?

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• SQL Server 2008 R2 SQL Server has encountered x occurrence(s) of I/O requests taking longer than 15 seconds to complete on file

  - by Natalia

  When I alter or create a stored procedure directly on production or QA database, after a few seconds I start experience timeouts and application becomes unavailable. Log files shows this error: SQL Server has encountered 3 occurrence(s) of I/O requests taking longer than 15 seconds to complete on file [C:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\DATA\QA_Database.ldf] in database [QA_Database] (9). The OS file handle is 0x0000000000000568. The offset of the latest long I/O is: 0x0000002821a200 We have SQL Server 2008 R2 installed, including latest Service Pack. Production and staging environments are completely separated. I tried to reproduce it on QA, but to no avail. I have no clue what it could be. Appreciate your help.

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• Guests can't access KVM host server by name although nslookup and dig returns correct record

  - by user190196

  So I have a KVM host that also runs an apache server with some yum repos. The VM guests are connected to the default virtual network, which is configured to offer DHCP and forwarding with NAT on virbr0 (192.168.12.1). The guests can successfully access the yum repos on the host by IP address, so for example curl 192.168.122.1/repo1 returns the content without problems. But I'd like to have the guests be able to reach the web server on the host by name rather IP address. I added the desired name record to the host's /etc/hosts file and libvirt's dnsmasq service seems to be serving that correctly to the guests since nslookup and dig successfully resolve the name on the guests: [root@localhost ~]# nslookup repo Server: 192.168.122.1 Address: 192.168.122.1#53 Name: repo Address: 192.168.122.1 [root@localhost ~]# dig repo ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.17.rc1.el6 <<>> repo ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 55938 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;repo. IN A ;; ANSWER SECTION: repo. 0 IN A 192.168.122.1 ;; Query time: 0 msec ;; SERVER: 192.168.122.1#53(192.168.122.1) ;; WHEN: Tue Sep 17 02:10:46 2013 ;; MSG SIZE rcvd: 38 But curl/ping/etc still fail: [root@localhost ~]# curl repo curl: (6) Couldn't resolve host 'repo' While a request via ip address works: [root@localhost ~]# curl 192.168.122.1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <html> <head> <title>Index of /</title> [...] Same with ping: [root@localhost ~]# ping repo ping: unknown host repo [root@localhost ~]# ping 192.168.122.1 PING 192.168.122.1 (192.168.122.1) 56(84) bytes of data. 64 bytes from 192.168.122.1: icmp_seq=1 ttl=64 time=0.110 ms 64 bytes from 192.168.122.1: icmp_seq=2 ttl=64 time=0.146 ms 64 bytes from 192.168.122.1: icmp_seq=3 ttl=64 time=0.191 ms ^C --- 192.168.122.1 ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2298ms rtt min/avg/max/mdev = 0.110/0.149/0.191/0.033 ms I tried adding repo 192.168.122.1 to the guests' /etc/hosts files but still no dice. Also tried changing guests' /etc/nsswitch.conf with both: hosts: files dns and hosts: dns files I've read the relevant libvirt documentation and I'm not sure where else to learn more about this and be able to move forward with it.

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• Using tshark to generate traffic logs every X seconds

  - by Sridhar Iyer

  I'm trying to use tshark to maintain a running history of all the packets that are going through an interface, for say 30 seconds. I want it to be human readable. This is a linux machine, and without mucking too much into the netstack source (which I can do if push comes to shove), I was wondering if I can use tshark to this. tshark has a -b duration:10 -b files:2 which I can use to generate a rotating set of 2 files, but I don't know which format it is printing the file in or how to read it.

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• Linux - Imaging backup solution?

  - by xperator

  I want to know is there a way to make a snapshot-like backup of a linux system into a single file and restore it in another system ? You know in windows there are programs which makes a copy of a drive (like C:\ ) into a single image file. So you can restore this file later incase you are infected or something happens. Every time I want to migrate my vps into another host, I have to setup the new server from scratch and move the files manually. Can I just make a snapshot backup of the whole system and restore it somewhere else (or on the same server) ? I am not familiar with linux and I have no idea if this is technically possible or not ? Does the paritions, configs, system files,etc... are individual for each system ? I heard about rsync, but that's not what I am looking for.

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• Archiving to Tape

  - by Bruno

  This is not about backups, this is about archiving. For arguments sake lets say I have 2TB 7z file that I would like to archive to tape. I have 4 LTO-5 tapes ( 1.5TB each ). This may be a stupid question but what set up would I need that would allow me to drag and drop those files directly onto those 2 tapes and would automatically split the file accross 2 tapes like so: ------------------ | Copy 1 | | 1.5TB | ------------------ ------------------ | Copy 1 | | 0.5TB | ------------------ ------------------ | Copy 2 | | 1.5TB | ------------------ ------------------ | Copy 2 | | 0.5TB | ------------------ I just want to be able to specify which files go on which tapes as oppose to backups where the tapes just rotate. Thanks.

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• Find and free disk space that is unused but unavailable (due to file system error, etc.)

  - by Voyagerfan5761

  Sometimes I get the feeling that if an app such as μTorrent allocates files on my FAT32-formatted flash drive, but then is killed or crashes (as happens more than a few times a month), that space just disappears from my file system. Whether or not that is the case, sometimes I do get a chill from wondering if I've lost hundreds of MB in available storage due to carelessness or malfunctions. Checking my disk with WinDirStat just makes it worse, because I see the huge "<Unknown>" item at the disk root staring at me, eating up well over a gigabyte. It might be FS inefficiency (due to 32 or 64kb sector/cluster size and a lot of tiny files) or it might be a glitch... Is there a tool I can download and run to check my file system and make sure that there aren't any unused allocated blocks on the disk? I want to make sure I'm not losing any disk space to I/O errors, etc.

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• Installing a wiki on Snow Leopard

  - by JPCF

  Hi... I want to instal twiki on my mac and server it from ~/Sites. Because the wiki has code to be run, I have to modify the user and group of wiki's files and directories, but I'm not sure about: 1) It is secure to change the user and group to the web server's group? If not what can I do having into account that I'll not put 777 permissions on those files? 2) How are named apache and web user groups? Thanks...

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• Setting up a fileserver, some questions?

  - by Tanax

  Recently I've become very interested in setting up a fileserver, mostly for home usage but also because of the fact that I live in 2 places, I need to be able to access my files from both homes. I have already done some research into this but I am unclear about some things. My requirements are the following; Needs to work on both Mac and PC(only using Windows atm on PC but could be good if it supports more OS's to make it futureproof in case I need Linux or something else) Need to be able to set up a folder/drive/network space to act as a link to a certain folder on the fileserver All files should only be stored on the fileserver, e.g. no "shared" folders like in Dropbox where files are stored on the client computer Would prefer it if folders are password protected or that I can somehow specify what users can access the fileserver's shares Fileserver's OS most likely have to be Windows due to other factors outside of being just a fileserver I've already kinda figured out that I will need to set up a VPN so that I can access my fileserver from outside the local network. Probably going to use OpenVPN. Question 1: How would I go about to set up a VPN server so that I can connect to my local network at the fileserver's location? I know that since I'm on a dynamic IP I will have to get some sort of dynamic DNS server - I've already checked into this and I'm fairly sure I know how to fix that. I also know that I will have to forward the port OpenVPN uses in my router. Question 2: How would I actually share the folders on the fileserver so that I can access them on my other computers? I've researched into Samba but I'm uncertain if it needs to be run on a Linux OS. I know that the clients connecting to it can be Windows for example but can the Samba "server" be run on Windows? Also it appears that Samba shares a folder, meaning it works like Dropbox - I don't want that. So how would I share a folder in that case to make it work like I want it to? Sorry for the incredibly long question, I tried to structure it the best I could for easier read. Thanks in advance!

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• Setting up a fileserver, some questions?

  - by Tanax

  Recently I've become very interested in setting up a fileserver, mostly for home usage but also because of the fact that I live in 2 places, I need to be able to access my files from both homes. I have already done some research into this but I am unclear about some things. My requirements are the following; Needs to work on both Mac and PC(only using Windows atm on PC but could be good if it supports more OS's to make it futureproof in case I need Linux or something else) Need to be able to set up a folder/drive/network space to act as a link to a certain folder on the fileserver All files should only be stored on the fileserver, e.g. no "shared" folders like in Dropbox where files are stored on the client computer Would prefer it if folders are password protected or that I can somehow specify what users can access the fileserver's shares Fileserver's OS most likely have to be Windows due to other factors outside of being just a fileserver I've already kinda figured out that I will need to set up a VPN so that I can access my fileserver from outside the local network. Probably going to use OpenVPN. Question 1: How would I go about to set up a VPN server so that I can connect to my local network at the fileserver's location? I know that since I'm on a dynamic IP I will have to get some sort of dynamic DNS server - I've already checked into this and I'm fairly sure I know how to fix that. I also know that I will have to forward the port OpenVPN uses in my router. Question 2: How would I actually share the folders on the fileserver so that I can access them on my other computers? I've researched into Samba but I'm uncertain if it needs to be run on a Linux OS. I know that the clients connecting to it can be Windows for example but can the Samba "server" be run on Windows? Also it appears that Samba shares a folder, meaning it works like Dropbox - I don't want that. So how would I share a folder in that case to make it work like I want it to? Sorry for the incredibly long question, I tried to structure it the best I could for easier read. Thanks in advance!

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• Copy and Paste without needing to use the Mouse

  - by Paul Farry

  In previous versions of windows when your were Copying Files (Ctrl-C) then alt-Tab (to the appropriate window) and Pasting (Ctrl-V) using the Keyboard everything could be driven by the keyboard. With Vista and 7, it seems if you are copying and pasting (and the files exist) in the Destination Location you have to Click the Copy and Replace, there doesn't seem to be a way to do it... "Do this for the next {n} Conflicts" can be driven by Alt-D, but the "Copy and Replace" and "Don't Copy" are not. Or is there and have I just missed something? I'm more than happy to change registry or something to enable Keyboard shortcuts for this.

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• How to specify file permission when putting a file using OpenSSH sftp command

  - by Adi Roiban

  I am using various SFTP clients for uploading files to an SFTP server and I have a problem with default permission used when putting files. When requesting to put a file, SFTP client like WinSCP or Filezilla will send the SSH_OPEN command without requesting any explicit file permission. On the other side, it looks like the OpenSSH sftp command on Linux (Red Hat and Ubuntu) is pending the SSH_OPEN command together with the '640' mode. How can I configure the OpenSSH command to not explictly set the file mode or how can I configure it to send a mode, other than 640? Many thanks! Update: I checked the OpenSSH sftp client source code and it looks like OpenSSH sftp will always tries to preserve file mode even if -P is not set: http://www.koders.com/c/fidD3B20680F615B33ACCB42398FAAFEE1C007DF942.aspx?s=rsa#L986 To solve this problem I used Putty SFTP client.

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• How do I use an internal SSD as a scratch disk for FCP X?

  - by andrewb

  I'm contemplating setting up my MacBook Air as a video editing machine. If I do this, I'll upgrade to a 256 GB SSD, and I should be able to keep around 100 GB or more free for video editing. The video files would of course be stored externally, but save purchasing some expensive Thunderbolt RAID device (which I suppose is gradually becoming more of an option), it will be slow for read/writes. How can I have a set up where I take advantage of my SSD's speed for a scratch disk/cache for FCP X, but still have the TB(s) of storage of externals? I don't want to have to be moving files constantly back and forth, this is about saving time not wasting it.

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