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• script to automatically test if a web site is available

  - by Xoundboy

  I'm a lone web developer with my own Centos VPS hosting a few small web sites for my clients. Today I discovered my httpd service had stopped (for no apparent reason - but that's another thread). I restarted it but now I need to find a way that I can be notified by email and/or SMS if it happens again - I don't like it when my client rings me to tell me their web site doesn't work! I know there are probably many different possibilities, including server monitoring software. I think all I really need is a script that I can run as a cron job from my dev host (which is permanently running in my office) that attempts to load a page from my production server and if it doesn't load within say 30 seconds then it sends me an email or SMS. I'm pretty rubbish at shell scripting, hence this question. Any suggestions would be gratefully appreciated, thanks to all you clever sysadmin guys and girls out there :)

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• DNS Replication issue

  - by BillN

  We host the DNS for our domain. Two weeks ago, the developer requested that we setup a new zone 'dev.ourdomain.com' and place two host records in it my.dev.ourdomain.com and admin.dev.ourdomain.com. We added the zone to our DNS and added A records for the host. Now a week later, some DNS servers like google (8.8.8.8) and gtei (4.2.2.2) will resolve the hosts, but others like OpenDNS (208.67.222.222 ) and ATT Uverse (68.94.156.1) cannot resolve it. Any Ideas?

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• Cannot open root device xvda1 or unknown-block(0,0)

  - by svoop

  I'm putting together a Dom0 and three DomU (all Gentoo) with kernel 3.5.7 and Xen 4.1.1. Each Dom has it's own md (md0 for Dom0, md1 for Dom1 etc). Dom0 works fine so far, however, I'm stuck trying to create DomUs. It appears the xvda1 device on DomU is not created or accessible: Parsing config file dom1 domainbuilder: detail: xc_dom_allocate: cmdline="root=/dev/xvda1 console=hvc0 root=/dev/xvda1 ro 3", features="(null)" domainbuilder: detail: xc_dom_kernel_mem: called domainbuilder: detail: xc_dom_boot_xen_init: ver 4.1, caps xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64 domainbuilder: detail: xc_dom_parse_image: called domainbuilder: detail: xc_dom_find_loader: trying multiboot-binary loader ... domainbuilder: detail: loader probe failed domainbuilder: detail: xc_dom_find_loader: trying Linux bzImage loader ... domainbuilder: detail: xc_dom_malloc : 10530 kB domainbuilder: detail: xc_dom_do_gunzip: unzip ok, 0x2f7a4f -> 0xa48888 domainbuilder: detail: loader probe OK xc: detail: elf_parse_binary: phdr: paddr=0x1000000 memsz=0x558000 xc: detail: elf_parse_binary: phdr: paddr=0x1558000 memsz=0x690e8 xc: detail: elf_parse_binary: phdr: paddr=0x15c2000 memsz=0x127c0 xc: detail: elf_parse_binary: phdr: paddr=0x15d5000 memsz=0x533000 xc: detail: elf_parse_binary: memory: 0x1000000 -> 0x1b08000 xc: detail: elf_xen_parse_note: GUEST_OS = "linux" xc: detail: elf_xen_parse_note: GUEST_VERSION = "2.6" xc: detail: elf_xen_parse_note: XEN_VERSION = "xen-3.0" xc: detail: elf_xen_parse_note: VIRT_BASE = 0xffffffff80000000 xc: detail: elf_xen_parse_note: ENTRY = 0xffffffff815d5210 xc: detail: elf_xen_parse_note: HYPERCALL_PAGE = 0xffffffff81001000 xc: detail: elf_xen_parse_note: FEATURES = "!writable_page_tables|pae_pgdir_above_4gb" xc: detail: elf_xen_parse_note: PAE_MODE = "yes" xc: detail: elf_xen_parse_note: LOADER = "generic" xc: detail: elf_xen_parse_note: unknown xen elf note (0xd) xc: detail: elf_xen_parse_note: SUSPEND_CANCEL = 0x1 xc: detail: elf_xen_parse_note: HV_START_LOW = 0xffff800000000000 xc: detail: elf_xen_parse_note: PADDR_OFFSET = 0x0 xc: detail: elf_xen_addr_calc_check: addresses: xc: detail: virt_base = 0xffffffff80000000 xc: detail: elf_paddr_offset = 0x0 xc: detail: virt_offset = 0xffffffff80000000 xc: detail: virt_kstart = 0xffffffff81000000 xc: detail: virt_kend = 0xffffffff81b08000 xc: detail: virt_entry = 0xffffffff815d5210 xc: detail: p2m_base = 0xffffffffffffffff domainbuilder: detail: xc_dom_parse_elf_kernel: xen-3.0-x86_64: 0xffffffff81000000 -> 0xffffffff81b08000 domainbuilder: detail: xc_dom_mem_init: mem 5000 MB, pages 0x138800 pages, 4k each domainbuilder: detail: xc_dom_mem_init: 0x138800 pages domainbuilder: detail: xc_dom_boot_mem_init: called domainbuilder: detail: x86_compat: guest xen-3.0-x86_64, address size 64 domainbuilder: detail: xc_dom_malloc : 10000 kB domainbuilder: detail: xc_dom_build_image: called domainbuilder: detail: xc_dom_alloc_segment: kernel : 0xffffffff81000000 -> 0xffffffff81b08000 (pfn 0x1000 + 0xb08 pages) domainbuilder: detail: xc_dom_pfn_to_ptr: domU mapping: pfn 0x1000+0xb08 at 0x7fdec9b85000 xc: detail: elf_load_binary: phdr 0 at 0x0x7fdec9b85000 -> 0x0x7fdeca0dd000 xc: detail: elf_load_binary: phdr 1 at 0x0x7fdeca0dd000 -> 0x0x7fdeca1460e8 xc: detail: elf_load_binary: phdr 2 at 0x0x7fdeca147000 -> 0x0x7fdeca1597c0 xc: detail: elf_load_binary: phdr 3 at 0x0x7fdeca15a000 -> 0x0x7fdeca1cd000 domainbuilder: detail: xc_dom_alloc_segment: phys2mach : 0xffffffff81b08000 -> 0xffffffff824cc000 (pfn 0x1b08 + 0x9c4 pages) domainbuilder: detail: xc_dom_pfn_to_ptr: domU mapping: pfn 0x1b08+0x9c4 at 0x7fdec91c1000 domainbuilder: detail: xc_dom_alloc_page : start info : 0xffffffff824cc000 (pfn 0x24cc) domainbuilder: detail: xc_dom_alloc_page : xenstore : 0xffffffff824cd000 (pfn 0x24cd) domainbuilder: detail: xc_dom_alloc_page : console : 0xffffffff824ce000 (pfn 0x24ce) domainbuilder: detail: nr_page_tables: 0x0000ffffffffffff/48: 0xffff000000000000 -> 0xffffffffffffffff, 1 table(s) domainbuilder: detail: nr_page_tables: 0x0000007fffffffff/39: 0xffffff8000000000 -> 0xffffffffffffffff, 1 table(s) domainbuilder: detail: nr_page_tables: 0x000000003fffffff/30: 0xffffffff80000000 -> 0xffffffffbfffffff, 1 table(s) domainbuilder: detail: nr_page_tables: 0x00000000001fffff/21: 0xffffffff80000000 -> 0xffffffff827fffff, 20 table(s) domainbuilder: detail: xc_dom_alloc_segment: page tables : 0xffffffff824cf000 -> 0xffffffff824e6000 (pfn 0x24cf + 0x17 pages) domainbuilder: detail: xc_dom_pfn_to_ptr: domU mapping: pfn 0x24cf+0x17 at 0x7fdece676000 domainbuilder: detail: xc_dom_alloc_page : boot stack : 0xffffffff824e6000 (pfn 0x24e6) domainbuilder: detail: xc_dom_build_image : virt_alloc_end : 0xffffffff824e7000 domainbuilder: detail: xc_dom_build_image : virt_pgtab_end : 0xffffffff82800000 domainbuilder: detail: xc_dom_boot_image: called domainbuilder: detail: arch_setup_bootearly: doing nothing domainbuilder: detail: xc_dom_compat_check: supported guest type: xen-3.0-x86_64 <= matches domainbuilder: detail: xc_dom_compat_check: supported guest type: xen-3.0-x86_32p domainbuilder: detail: xc_dom_compat_check: supported guest type: hvm-3.0-x86_32 domainbuilder: detail: xc_dom_compat_check: supported guest type: hvm-3.0-x86_32p domainbuilder: detail: xc_dom_compat_check: supported guest type: hvm-3.0-x86_64 domainbuilder: detail: xc_dom_update_guest_p2m: dst 64bit, pages 0x138800 domainbuilder: detail: clear_page: pfn 0x24ce, mfn 0x37ddee domainbuilder: detail: clear_page: pfn 0x24cd, mfn 0x37ddef domainbuilder: detail: xc_dom_pfn_to_ptr: domU mapping: pfn 0x24cc+0x1 at 0x7fdece675000 domainbuilder: detail: start_info_x86_64: called domainbuilder: detail: setup_hypercall_page: vaddr=0xffffffff81001000 pfn=0x1001 domainbuilder: detail: domain builder memory footprint domainbuilder: detail: allocated domainbuilder: detail: malloc : 20658 kB domainbuilder: detail: anon mmap : 0 bytes domainbuilder: detail: mapped domainbuilder: detail: file mmap : 0 bytes domainbuilder: detail: domU mmap : 21392 kB domainbuilder: detail: arch_setup_bootlate: shared_info: pfn 0x0, mfn 0xbaa6f domainbuilder: detail: shared_info_x86_64: called domainbuilder: detail: vcpu_x86_64: called domainbuilder: detail: vcpu_x86_64: cr3: pfn 0x24cf mfn 0x37dded domainbuilder: detail: launch_vm: called, ctxt=0x7fff224e4ea0 domainbuilder: detail: xc_dom_release: called Daemon running with PID 4639 [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu [ 0.000000] Linux version 3.5.7-gentoo (root@majordomo) (gcc version 4.5.4 (Gentoo 4.5.4 p1.0, pie-0.4.7) ) #1 SMP Tue Nov 20 10:49:51 CET 2012 [ 0.000000] Command line: root=/dev/xvda1 console=hvc0 root=/dev/xvda1 ro 3 [ 0.000000] ACPI in unprivileged domain disabled [ 0.000000] e820: BIOS-provided physical RAM map: [ 0.000000] Xen: [mem 0x0000000000000000-0x000000000009ffff] usable [ 0.000000] Xen: [mem 0x00000000000a0000-0x00000000000fffff] reserved [ 0.000000] Xen: [mem 0x0000000000100000-0x0000000138ffffff] usable [ 0.000000] NX (Execute Disable) protection: active [ 0.000000] MPS support code is not built-in. [ 0.000000] Using acpi=off or acpi=noirq or pci=noacpi may have problem [ 0.000000] DMI not present or invalid. [ 0.000000] No AGP bridge found [ 0.000000] e820: last_pfn = 0x139000 max_arch_pfn = 0x400000000 [ 0.000000] e820: last_pfn = 0x100000 max_arch_pfn = 0x400000000 [ 0.000000] init_memory_mapping: [mem 0x00000000-0xffffffff] [ 0.000000] init_memory_mapping: [mem 0x100000000-0x138ffffff] [ 0.000000] NUMA turned off [ 0.000000] Faking a node at [mem 0x0000000000000000-0x0000000138ffffff] [ 0.000000] Initmem setup node 0 [mem 0x00000000-0x138ffffff] [ 0.000000] NODE_DATA [mem 0x1387fc000-0x1387fffff] [ 0.000000] Zone ranges: [ 0.000000] DMA [mem 0x00010000-0x00ffffff] [ 0.000000] DMA32 [mem 0x01000000-0xffffffff] [ 0.000000] Normal [mem 0x100000000-0x138ffffff] [ 0.000000] Movable zone start for each node [ 0.000000] Early memory node ranges [ 0.000000] node 0: [mem 0x00010000-0x0009ffff] [ 0.000000] node 0: [mem 0x00100000-0x138ffffff] [ 0.000000] SMP: Allowing 1 CPUs, 0 hotplug CPUs [ 0.000000] No local APIC present [ 0.000000] APIC: disable apic facility [ 0.000000] APIC: switched to apic NOOP [ 0.000000] e820: cannot find a gap in the 32bit address range [ 0.000000] e820: PCI devices with unassigned 32bit BARs may break! [ 0.000000] e820: [mem 0x139100000-0x1394fffff] available for PCI devices [ 0.000000] Booting paravirtualized kernel on Xen [ 0.000000] Xen version: 4.1.1 (preserve-AD) [ 0.000000] setup_percpu: NR_CPUS:64 nr_cpumask_bits:64 nr_cpu_ids:1 nr_node_ids:1 [ 0.000000] PERCPU: Embedded 26 pages/cpu @ffff880138400000 s75712 r8192 d22592 u2097152 [ 0.000000] Built 1 zonelists in Node order, mobility grouping on. Total pages: 1259871 [ 0.000000] Policy zone: Normal [ 0.000000] Kernel command line: root=/dev/xvda1 console=hvc0 root=/dev/xvda1 ro 3 [ 0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes) [ 0.000000] __ex_table already sorted, skipping sort [ 0.000000] Checking aperture... [ 0.000000] No AGP bridge found [ 0.000000] Memory: 4943980k/5128192k available (3937k kernel code, 448k absent, 183764k reserved, 1951k data, 524k init) [ 0.000000] SLUB: Genslabs=15, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 [ 0.000000] Hierarchical RCU implementation. [ 0.000000] NR_IRQS:4352 nr_irqs:256 16 [ 0.000000] Console: colour dummy device 80x25 [ 0.000000] console [tty0] enabled [ 0.000000] console [hvc0] enabled [ 0.000000] installing Xen timer for CPU 0 [ 0.000000] Detected 3411.602 MHz processor. [ 0.000999] Calibrating delay loop (skipped), value calculated using timer frequency.. 6823.20 BogoMIPS (lpj=3411602) [ 0.000999] pid_max: default: 32768 minimum: 301 [ 0.000999] Security Framework initialized [ 0.001355] Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes) [ 0.002974] Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes) [ 0.003441] Mount-cache hash table entries: 256 [ 0.003595] Initializing cgroup subsys cpuacct [ 0.003599] Initializing cgroup subsys freezer [ 0.003637] ENERGY_PERF_BIAS: Set to 'normal', was 'performance' [ 0.003637] ENERGY_PERF_BIAS: View and update with x86_energy_perf_policy(8) [ 0.003643] CPU: Physical Processor ID: 0 [ 0.003645] CPU: Processor Core ID: 0 [ 0.003702] SMP alternatives: switching to UP code [ 0.011791] Freeing SMP alternatives: 12k freed [ 0.011835] Performance Events: unsupported p6 CPU model 42 no PMU driver, software events only. [ 0.011886] Brought up 1 CPUs [ 0.011998] Grant tables using version 2 layout. [ 0.012009] Grant table initialized [ 0.012034] NET: Registered protocol family 16 [ 0.012328] PCI: setting up Xen PCI frontend stub [ 0.015089] bio: create slab <bio-0> at 0 [ 0.015158] ACPI: Interpreter disabled. [ 0.015180] xen/balloon: Initialising balloon driver. [ 0.015180] xen-balloon: Initialising balloon driver. [ 0.015180] vgaarb: loaded [ 0.016126] SCSI subsystem initialized [ 0.016314] PCI: System does not support PCI [ 0.016320] PCI: System does not support PCI [ 0.016435] NetLabel: Initializing [ 0.016438] NetLabel: domain hash size = 128 [ 0.016440] NetLabel: protocols = UNLABELED CIPSOv4 [ 0.016447] NetLabel: unlabeled traffic allowed by default [ 0.016475] Switching to clocksource xen [ 0.017434] pnp: PnP ACPI: disabled [ 0.017501] NET: Registered protocol family 2 [ 0.017864] IP route cache hash table entries: 262144 (order: 9, 2097152 bytes) [ 0.019322] TCP established hash table entries: 524288 (order: 11, 8388608 bytes) [ 0.020376] TCP bind hash table entries: 65536 (order: 8, 1048576 bytes) [ 0.020497] TCP: Hash tables configured (established 524288 bind 65536) [ 0.020500] TCP: reno registered [ 0.020525] UDP hash table entries: 4096 (order: 5, 131072 bytes) [ 0.020564] UDP-Lite hash table entries: 4096 (order: 5, 131072 bytes) [ 0.020624] NET: Registered protocol family 1 [ 0.020658] PCI-DMA: Using software bounce buffering for IO (SWIOTLB) [ 0.020662] software IO TLB [mem 0xfb632000-0xff631fff] (64MB) mapped at [ffff8800fb632000-ffff8800ff631fff] [ 0.020750] platform rtc_cmos: registered platform RTC device (no PNP device found) [ 0.021378] HugeTLB registered 2 MB page size, pre-allocated 0 pages [ 0.023378] msgmni has been set to 9656 [ 0.023544] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253) [ 0.023549] io scheduler noop registered [ 0.023551] io scheduler deadline registered [ 0.023580] io scheduler cfq registered (default) [ 0.023650] pci_hotplug: PCI Hot Plug PCI Core version: 0.5 [ 0.023845] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled [ 0.024082] Non-volatile memory driver v1.3 [ 0.024085] Linux agpgart interface v0.103 [ 0.024207] Event-channel device installed. [ 0.024265] [drm] Initialized drm 1.1.0 20060810 [ 0.024268] [drm:i915_init] *ERROR* drm/i915 can't work without intel_agp module! [ 0.025145] brd: module loaded [ 0.025565] loop: module loaded [ 0.045646] Initialising Xen virtual ethernet driver. [ 0.198264] i8042: PNP: No PS/2 controller found. Probing ports directly. [ 0.199096] i8042: No controller found [ 0.199139] mousedev: PS/2 mouse device common for all mice [ 0.259303] rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0 [ 0.259353] rtc_cmos: probe of rtc_cmos failed with error -38 [ 0.259440] md: raid1 personality registered for level 1 [ 0.259542] nf_conntrack version 0.5.0 (16384 buckets, 65536 max) [ 0.259732] ip_tables: (C) 2000-2006 Netfilter Core Team [ 0.259747] TCP: cubic registered [ 0.259886] NET: Registered protocol family 10 [ 0.260031] ip6_tables: (C) 2000-2006 Netfilter Core Team [ 0.260070] sit: IPv6 over IPv4 tunneling driver [ 0.260194] NET: Registered protocol family 17 [ 0.260213] Bridge firewalling registered [ 5.360075] XENBUS: Waiting for devices to initialise: 25s...20s...15s...10s...5s...0s...235s...230s...225s...220s...215s...210s...205s...200s...195s...190s...185s...180s...175s...170s...165s...160s...155s...150s...145s...140s...135s...130s...125s...120s...115s...110s...105s...100s...95s...90s...85s...80s...75s...70s...65s...60s...55s...50s...45s...40s...35s...30s...25s...20s...15s...10s...5s...0s... [ 270.360180] XENBUS: Timeout connecting to device: device/vbd/51713 (local state 3, remote state 1) [ 270.360273] md: Waiting for all devices to be available before autodetect [ 270.360277] md: If you don't use raid, use raid=noautodetect [ 270.360388] md: Autodetecting RAID arrays. [ 270.360392] md: Scanned 0 and added 0 devices. [ 270.360394] md: autorun ... [ 270.360395] md: ... autorun DONE. [ 270.360431] VFS: Cannot open root device "xvda1" or unknown-block(0,0): error -6 [ 270.360435] Please append a correct "root=" boot option; here are the available partitions: [ 270.360440] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) [ 270.360444] Pid: 1, comm: swapper/0 Not tainted 3.5.7-gentoo #1 [ 270.360446] Call Trace: [ 270.360454] [<ffffffff813d2205>] ? panic+0xbe/0x1c5 [ 270.360459] [<ffffffff813d2358>] ? printk+0x4c/0x51 [ 270.360464] [<ffffffff815d5fb7>] ? mount_block_root+0x24f/0x26d [ 270.360469] [<ffffffff815d62b6>] ? prepare_namespace+0x168/0x192 [ 270.360474] [<ffffffff815d5ca7>] ? kernel_init+0x1b0/0x1c2 [ 270.360477] [<ffffffff815d5500>] ? loglevel+0x34/0x34 [ 270.360482] [<ffffffff813d5a64>] ? kernel_thread_helper+0x4/0x10 [ 270.360486] [<ffffffff813d4038>] ? retint_restore_args+0x5/0x6 [ 270.360490] [<ffffffff813d5a60>] ? gs_change+0x13/0x13 The config: name = "dom1" bootloader = "/usr/bin/pygrub" root = "/dev/xvda1 ro" extra = "3" # runlevel memory = 5000 disk = [ 'phy:/dev/md1,xvda1,w' ] # vif = [ 'ip=..., vifname=veth1' ] # none for now Here are some details on the Dom0 kernel (grepping for "xen"): CONFIG_XEN=y CONFIG_XEN_DOM0=y CONFIG_XEN_PRIVILEGED_GUEST=y CONFIG_XEN_PVHVM=y CONFIG_XEN_MAX_DOMAIN_MEMORY=500 CONFIG_XEN_SAVE_RESTORE=y CONFIG_PCI_XEN=y CONFIG_XEN_PCIDEV_FRONTEND=y # CONFIG_XEN_BLKDEV_FRONTEND is not set CONFIG_XEN_BLKDEV_BACKEND=y # CONFIG_XEN_NETDEV_FRONTEND is not set CONFIG_XEN_NETDEV_BACKEND=y CONFIG_INPUT_XEN_KBDDEV_FRONTEND=y CONFIG_HVC_XEN=y CONFIG_HVC_XEN_FRONTEND=y # CONFIG_XEN_WDT is not set # CONFIG_XEN_FBDEV_FRONTEND is not set # Xen driver support CONFIG_XEN_BALLOON=y # CONFIG_XEN_SELFBALLOONING is not set CONFIG_XEN_SCRUB_PAGES=y CONFIG_XEN_DEV_EVTCHN=y CONFIG_XEN_BACKEND=y CONFIG_XENFS=y CONFIG_XEN_COMPAT_XENFS=y CONFIG_XEN_SYS_HYPERVISOR=y CONFIG_XEN_XENBUS_FRONTEND=y CONFIG_XEN_GNTDEV=m CONFIG_XEN_GRANT_DEV_ALLOC=m CONFIG_SWIOTLB_XEN=y CONFIG_XEN_TMEM=y CONFIG_XEN_PCIDEV_BACKEND=m CONFIG_XEN_PRIVCMD=y CONFIG_XEN_ACPI_PROCESSOR=m And the DomU kernel (grepping for "xen"): CONFIG_XEN=y CONFIG_XEN_DOM0=y CONFIG_XEN_PRIVILEGED_GUEST=y CONFIG_XEN_PVHVM=y CONFIG_XEN_MAX_DOMAIN_MEMORY=500 CONFIG_XEN_SAVE_RESTORE=y CONFIG_PCI_XEN=y CONFIG_XEN_PCIDEV_FRONTEND=y CONFIG_XEN_BLKDEV_FRONTEND=y CONFIG_XEN_NETDEV_FRONTEND=y CONFIG_INPUT_XEN_KBDDEV_FRONTEND=y CONFIG_HVC_XEN=y CONFIG_HVC_XEN_FRONTEND=y # CONFIG_XEN_WDT is not set # CONFIG_XEN_FBDEV_FRONTEND is not set # Xen driver support CONFIG_XEN_BALLOON=y # CONFIG_XEN_SELFBALLOONING is not set CONFIG_XEN_SCRUB_PAGES=y CONFIG_XEN_DEV_EVTCHN=y # CONFIG_XEN_BACKEND is not set CONFIG_XENFS=y CONFIG_XEN_COMPAT_XENFS=y CONFIG_XEN_SYS_HYPERVISOR=y CONFIG_XEN_XENBUS_FRONTEND=y CONFIG_XEN_GNTDEV=m CONFIG_XEN_GRANT_DEV_ALLOC=m CONFIG_SWIOTLB_XEN=y CONFIG_XEN_TMEM=y CONFIG_XEN_PRIVCMD=y CONFIG_XEN_ACPI_PROCESSOR=m Any ideas what I'm doing wrong here? Thanks a lot!

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• How to save a document and close it after the save

  - by Le Questione

  Currently I have a .bat file that opens a program, opens a document and then reloads this document so it contains new data. After that I need a timeout so it can run some other things within the document which takes about 2 minutes in total, but for safety I used 5 minutes. Then I want it to save the document and close the program. I've searched a lot for this but I can't find anything that saves the document and then closes it. Only can find how to save a bat file, but I already have that! CD /D "D:\01 - Config\02 - Developer" start qv.exe /l "D:\02 - Content\07 - Accesspoint\tracktrace.qvw" timeout /t 300 ???? exit 0 Please advise, thanks

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• What hardware factors may be considered bottlenecks on a Hyper-V virtual server during load testing?

  - by sean

  Our organization is load testing our application using virtual servers via Hyper-V to see what the user load can be using fair equipment on a single box setup. The developer group questioned the validity of the tests given the normal use of the box by the other virtual machines. IT admins answered that it is an acceptable platform to load test on because it has its own CPUs, memory and disks allocated. Is their answer mostly correct? What hardware factors may be considered bottle necks given the other virtual machines when testing our application? For example, would bus speed be a concern or network IO? The application consists of a windows service written using the 4.0 .NET Framework and SQL Server 2008 R2.

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• ISPs with good upload speeds? [closed]

  - by Josh Comley

  I am a web developer, and I spend most of my time not waiting for downloads but waiting for my latest build of a website to publish to a test site. I use the excellent BeyondCompare to ensure I only upload what I need to upload. But still, if a 2MB C# DLL has changed, so be it. And I must wait. At work we host our own servers and have a dedicated line, so for 8.5 hours of my day I have blistering upload speeds across the web, which is nice. At home however, it's a different story. I am with Virgin Media on their XL internet package (I think). I think that means I get 256Kb upload and 20Mb download. So I have began to wonder - are there any ISPs in the UK with good upload speeds? If you know of any for other countries, do post for other's sake, but please specify which country your post is relevant to.

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• Using a time to set XY chart axis scaling like in 2003

  - by CookieOfFortune

  In Excel 2003, when you created a XY chart using time as an axis, you could set the scaling of these axes by typing in the date. In Excel 2007, you have to use the decimal version of the time (eg. How many days since some arbitrary earlier date). I was wondering if there was a way to avoid having to make such a calculation? A developer posted on a blog that this issue would be fixed in a future release, but all versions of Excel 2007 I have tried have not resolved this issue. The relevant quote: Those of you familiar with this technique of converting time to a decimal may recall that Excel 2003 allowed you to enter a date and time like “1/1/07 11:00 AM” directly in the axis option min/max fields and Excel would calculate the appropriate decimal representation. This currently does not work in Excel 2007 but will be fixed in a subsequent release.

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• Do all domains on the same shared hosting server have the same IP or ID

  - by silow

  Here's what I've got: siteA.com and siteB.com are hosted on hostgator. They're hosted on the same account of a shared hosting server (not VPS or dedicated). script.php is an external site that each of these 2 sites are accessing. I noticed that when siteA.com or siteB.com access the outside script.php, the script identifies them both as 1a.12.12ab.static.theplanet.com (apparently because hostgator uses theplanet.com servers). The fact that they're identified as the same value isn't surprising because after all they're hosted on the same account /home/user123/public_html. What I'm wondering about is how about other websites that are hosted on the same shared hosting server, but under other accounts. Basically other websites that are under another developer's control, but just happen to share the same hardware (hosting server). Do they also have the exact same identifier 1a.12.12ab.static.theplanet.com or that changes by account?

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• How can I delete current session in Chrome?

  - by Eric

  I'm using Google Chrome and want to delete the current session data on the fly. I can do this on Firefox with the web developer extension, but Chrome doesn't seem to have the same option in their webdev extension. So how can I do this? I realize that session data is stored on the server side and tracked in the browser with cookies. So really, I think what I want to do is delete cookies that are set to live for the session lifetime. Is there a way to do THAT in Chrome? "Delete browsing data" lets me delete all cookies from within a certain time period (for example, the last hour), but that could delete OTHER cookies on the site that I don't want to erase. I just want to delete the cookie being used to track my current session. Thanks y'all...

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• Apache Tomcat 6.0.29 startup causing Win XP SP3 reboot

  - by Liam

  Some of our Windows XP Developer machines die (black screen - no ping) when starting up Tomcat from a console. This only happens if the Tomcat debug console window is displayed (not minimised). When minimised, the startup / run is successful. I've checked for Tomcat logs and the crash sessions produce empty (zero bytes) tomcat log files. No system logs exist and no crash dump is created even though this is enabled in the Windows settings. The machine is dual screen and another machine with the same image has the same issue. The only clue is just before the crash, one of the monitors the system reports "Cannot display video mode 1280x1024" (approximate error, didn't write it down). Is there a way I can get Windows to produce log files of this crash session? Beyond running Tomcat as a service / minimised window, how can I fix (or even investigate)?

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• How do I use the Microsoft IIS Diagnostics Toolkit to troubleshoot my problems?

  - by smartdirt

  I have downloaded the [IIS Diagnostics Toolkit (x86)][1] [1]: http://www.microsoft.com/downloads/en/details.aspx?familyid=9bfa49bc-376b-4a54-95aa-73c9156706e7&displaylang=en and I was wondering how to use it. I'm not a system admin just a developer trying to work my way around a strange problem. I have an iis server running php(not my choice) and every once in a while the application will not allow anyone to log in and then a little while later it just starts working again. I look in the event viewer and don't see anything and the iis logs are no help either. I read somewhere about someone using the the toolkit to diagnose there problem. I just need a little guidance on how to use this tool. Thanks.

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• Monitoring several remote servers over different VPNs

  - by Ciaran

  I'm a developer with about 20 different clients running our server application. I access each of the clients' servers remotely through VPN to provide support, updates, etc. Is there any tool available that I can set up locally that will connect through each of the VPNs automatically to allow me to monitor? The idea sounds very far fetched to me as the VPN software varies a good bit but maybe someone's had to do something similar before? It's been a few years since I last used Nagios but I think it'd be quite cool to have that set up pointing at each of the remote servers through VPN somehow.

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• Looking for WYSIWYG tool to create and edit HTML5 based presentations (slides)

  - by peterp

  There are a lot of different implementations for HTML5 based slide presentations out there, like Google Slides or S5. But all that I have seen so far, seem to need a person being able to (and willing to) read and write HTML-Code. My company still uses Powerpoint, but some people are quite unhappy about its limitedness, e.g. the lack of possibilites to embed animation (other than just appear/disappear) without using flash. I'd love to suggest a state-of-the-art solution based on HTML5, but I don't even need to think about suggesting a solution where the project people need a techie to add or edit the content of a slide. I am not looking for an editor for non-technies to create complex HTML5/javascript based animations, of course, those should be done by a developer... basically non-technies should be capable of doing the stuff they are doing in powerpoint now. Thanks in advance for your suggestions, Peter

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• Hyper-V CPU Utilization, Good Tools?

  - by yzorg

  I just learned a ton from this post: Host CPU% doesn't include child VM CPU%, specifically I learned that both the 'host OS' and 'child VM' are siblings within the HyperVisor layer. Are there good utilities for 'watching' the total CPU and other resource counters at the HyperVisor (hardware) layer? I know perfmon (watching special Hyper-V CPU counters) is the standard answer, but I've stayed away from perfmon for ad-hoc monitoring. Is there a good OSS or free tools to 'watch' the resource utilization as I create multiple new VMs running on the server? I'm a developer, so if there aren't any good UI tools to surface this data I'd consider creating one, but only if needed. P.S. My specific scenario is I'm creating new web, SQL and back-end server VMs for new Windows 8 Server and SQL 2012 (entire application stack). I need to monitor them for utilization and know when I need to grow beyond 1 host (I'll need to split the VMs into separate hosts as I hit hardware limits of the 1st host, and diagnose problems).

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• Advanced command line editing for Windows?

  - by Ben Collins

  I'm developer who was "born and bred" on Linux and BSD systems, and I've become accustomed to having advanced tools for the console (posix shells like bash, for example). My career has taken a twist that means I'm working in a Windows environment most of the time, and the console capabilities are really poor by comparison. The traditional windows console environment is a complete joke, and even most of the third party attempts at improving things aren't a lot better. PowerShell is a huge step in the right direction, but the console applications themselves are still way behind where unix has been for 20 years. Does anyone know of a PowerShell console application that supports advanced command line editing like posix shells do? I'm particularly interested in emacs-mode editing, and I'd also like to be able to resize my window to an arbirary size, unlike the native console app that comes with Windows.

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• How to copy/paste LARGE amounts of text in Windows

  - by Johnson

  I am not sure if this is more suited for Superuser or Stackoverflow, but here goes... A little bit of background: I'm learning SQL and was trying to make a very large table which I could use for optimization tests. Something generic with random values. I created a little Java program to do just that, and was able to put out a text file with 100,000 lines, each line being an SQL INSERT statement for a new random record. However, with anything much bigger than 100,000 lines, I had problems either opening/using the text file in any text editor, or copying/pasting the text to the windows clipboard and then into SQL Developer so I could execute it as a script. I'm probably overlooking something really obvious, or doing something really stupid. There has got to be a better way to do this, but I couldn't find anything through Google or Stackoverflow or Superuser. Thanks!

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• Would Apple be able to tell if I'm running Mac OS inside a VM?

  - by Thomas Havlik

  Just as the question/title says. I understand that running Mac OS inside of a VM is against the EULA for the consumer version (but not the server, which is much more expensive!) If I were to purchase a legal copy of Mac OS, and install it to a VM, then register as an Apple Developer, would they shut me out? Is there a way they can tell the difference between emulated hardware and Apple computers? I'm slightly unfamiliar with how all of Apple's software works. Windows goes through this "genuine" test whenever installing service packs, but I don't know if Mac goes through the same trouble. Many thanks, -Tom

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• Ubuntu+Mono+Postgres+ASP.NET 4.0. No problem?

  - by wreck_of_u

  Would this be ok? I'm an ASP.NET developer and I'm planning to build "portable" web app servers based on Atom D510 mini-ITX. I have ran Ubuntu 10 with MySQL along with a separate IIS machines (win 2k3, 2k8) before with no problems. But now I'm thinking of "packaging" a web/db server into one small, cheap machine. I thought of Ubuntu/Mono/Postgres/ASP.NET, that it would be a good idea but I'm not sure? I have not actually tried it yet. Your thoughts?

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• Setting up Ubuntu Server for hosting Java web applications

  - by Denis Hoss

  I'm trying to set up an Web Server running Ubuntu server to host some Java web applications, with MySQL running on it, an so on .. here is the tutorial I follow: perfect server ubuntu 11.10 The server configuration is: CPU S1155 INTEL Pentium G850 2.9GHz VGA 5GTs 3MB 65W MB Gigabyte GA-H77-D3H Ram 4x4Gb HDD 5x1TB Seagate (4 in RAID5 and 1 for Backup) The problem is that when I am trying to install the Server version of Ubuntu, when the installer asks me whether to activate ATA RAID Devices, and I click yes, he sees only that one, if I click no, he sees all 5 HDD's separate without any RAID, is this normal? I also tried to install the Desktop version on RAID5, but after restart, Ubuntu does't want to boot up, an underscore stands on the top of the screen. I am a newbie in servers and their configuration, in fact I am developer. I need a help from you guys.

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• How to set file associations and explorer options in one go?

  - by jokoon

  This has been itching me for quite a long time. When I come on a new computer with any version of Windows, I need to: un-hide file extensions set explorer default view to list instead of icons set the file extensions like h c cpp so they don't open Visual C++ (which can take up to 20 seconds!) each time I double click on them, opening them with something like Notepad++ instead. Isn't there some program to quickly set thoses options to something I want, like some standalone exe, or some generic registry file I can execute when I come on a new machine? I'm a developer and I can't believe I'm wasting so much time on those &*$%@# things.

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• Preferred apache permissions for www files with several authors

  - by user1316464

  I can't for the life of me figure out how to design my permissions scheme for my apache files. My requirements seem pretty simple: Apache should have standard permissions of RX for Directories and R for files Web authors should have RWX for Directories and RW for files Don't want to give any access to "other" Want new files/folders to inherit the proper permissions Here are the schemes I've tried 570 for directories and 460 for files Owner: Apache Group: Webdev The problem here is that new files created by users int the Webdev group are owned by user:Webdev and Apache can't read them. If Apache were in the group Webdev then it would also have the wrong permissions (ie it would have Write permissions to files) 750 for directories and 640 for files Owner: Webdev Group: Apache (Webdev is a member of Apache) The problem here is that there is only one webdev account and I have multiple people who need access to contribute. In theory this would work with only one developer if Webdev were also a member of the Apache group. Any ideas?

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• What are the risks in putting website files in the "root" folder of a shared web hosting server?

  - by Obay Ouano

  A site I've been asked to manage is hosted (shared) on GoDaddy, with this folder structure: / public_html public_ftp mail stats logs etc... However, the website files are stored in the / folder, and NOT in public_html. I'm not sure if this is how GoDaddy sets up their customers' accounts, or if the old web developer accidentally changed it from public_html to root. But when we call up GoDaddy to tell them to correct this (move files to public_html), they won't change it and insist that there is no security risk unless someone gets a hold of the FTP password. Is this true? (I have always read that website files should be inside public_html.) If not, where could this setting be changed? The .htaccess is empty.

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• team foundation server 2010 installation from DVD - I get agent installation instead!

  - by Avi

  GRRRRRRRRRRRR!(#Y%)@#!! They bragged they now have a very easy installation! I don't get it. I entered the MSDN "Disk 5000: Developer Tools" DVD, opened default.htm, clicked on the "Visual Studio Team Foundation Server 2010" link. The VSTFS2010 folder open. I click autorun.exe. And then I get "Microsoft Visual Studio Agents 2010 Setup". I don't get it. Why "agents"? I wanted to instal a server!

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• Puzzled about PHP file permission and shared webhosting - what are some explanations?

  - by extrakun

  I have this issue with different web-hosting, particular upload scripts which can only upload to a folder only if it has 777 permission (which is risky). On the test server (on a different webhost), 755 works well. On another web-hosting, log files generated by PHP file functions cannot be write to some time, but other files are mysteriously unaffected (for instance, the log files for the entire week is 655, and they work well, but just today's log-file doesn't work unless it is set to 777). I am more of an application developer than a server backend expert, so these behaviours puzzle me to no end. Why are they happening? What can be done?

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• How can I determine what is causing SQL Server 2008 Express to hang Windows 7?

  - by thelaughingdm

  I have SQL Server Express 2008 installed on a Windows 7 (32-bit) developer workstation. Whenever I run an application that accesses SQL Server the Windows 7 shell hangs when the application closes. Applications like Windows Explorer and Task Manager become completely unresponsive. The task bar will not allow any interaction. The only way to recover the system is to power cycle. Two of the applications in use when this happens are NUnit and SQL Server Management Studio. NUnit always runs the unit tests that interact with the database fine. SQL Server Management Studio will sometimes cause the problem while trying to explore the database. The Windows event log does not show any events that are obviously connected to the problem. I have reverted and reinstalled SQL Server Express 2008 several times. What can be done to identify what is causing SQL Server Express 2008 to hang the Windows 7 shell?

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