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• How to check use of userva boot option on Win 2K3 server

  - by Tim Sylvester

  I have some 32-bit Win2K3 servers running an application that fails now and then apparently due to heap fragmentation. (Process virtual bytes grows, private bytes does not) I do not have access to the source code or build process of this application. I have modified the boot.ini file on one of these servers to include /userva=2560, half way between the normal mode of operation and the /3GB option. Normally it takes weeks to reach the point of failure, but I'd like to see right away whether this has actually had any effect. As I understand it, this option limits the kernel to the remaining address space (1536MB instead of 2048), but does not necessarily give an application the extra address space, depending on the flags in the application's PE header. How can I determine whether the O/S is allowing a particular application, running in production, to access address space above 2GB? Additionally, what's the best way to monitor the system to ensure that the kernel is not starved for address space, and more generally how should I go about finding the optimal value for this setting?

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• Mounting LVM2 volume with XFS filesystem

  - by Chris

  Unfortunately I'm not able to access the data on my NAS anymore. I can't figure out why this is the case as I haven't changed anything. So I plugged one of the harddisks in my computer to access the data. What I did: kpartx -a /dev/sdc Now I should be able to access /dev/mapper/vg001-lv001 When trying to mount it I get: sudo mount -t xfs /dev/mapper/vg001-lv001 /home/user/mnt mount: /dev/mapper/vg001-lv001: can't read superblock Now I did a parted -l which gave me Modell: Linux device-mapper (linear) (dm) Festplatte /dev/mapper/vg001-lv001: 498GB Sektorgröße (logisch/physisch): 512B/512B Partitionstabelle: loop Number Begin End Size Filesystem Flags 1 0,00B 498GB 498GB xfs Does anybody have a solution how to recover the data?

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• Add "secure" in cookie by httpd server

  - by Abhishek

  How do I have to configure my httpd server to add "Secure" in the cookies? I tried the one in the below link, http://blog.modsecurity.org/2008/12/fixing-both-missing-httponly-and-secure-cookie-flags.html but this did not seem to be working. I inspected the cookie via firebug and found that the cookies have "HttpOnly" but not "Secure". I double checked the configurations and they the same as mentioned in the link. I also noticed that the server response time goes bit high when doing it by mod_security. Is there a better way to do it? Any ideas or pointers to configurations would be helpful

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• NTFS write speed really slow (<15MB/s)

  - by Zulakis

  I got a new Seagate 4TB harddrive formatted with ntfs using parted /dev/sda > mklabel gpt > mkpart pri 1 -1 mkfs.ntfs /dev/sda1 When copying files or testing writespeed with dd, the max writespeed I can get is about 12MB/s. The harddrive should be capable of atleast 100MB/s. top shows high cpu usage for the mount.ntfs process. The system has a AMD dualcore. This is the output of parted /dev/sda unit s print: Model: ATA ST4000DM000-1F21 (scsi) Disk /dev/sda: 7814037168s Sector size (logical/physical): 512B/4096B Partition Table: gpt Number Start End Size File system Name Flags 1 2048s 7814035455s 7814033408s pri The used kernel is 3.5.0-23-generic. The ntfs-3g versions I tried are ntfs-3g 2012.1.15AR.1 (ubuntu 12.04 default) and the newest version ntfs-3g 2013.1.13AR.2. When formatted with ext4 I get good write speeds with about 140MB/s. How can I fix the writespeed?

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• Howto setup neocomplcache?

  - by eddy

  I just started using vim and saw a cool plugin: [neocomplcache].(http://www.vim.org/scripts/script.php?script_id=2620) My Problem is, that I can't get it to work properly. After installing, I took the example config from the help files of neocomplcache and added the lines to my .vimrc At first I wanted to create a simple latex file (there are snippets for tex). After typing "begi" there appears a menu, I can choose between the snippets with TAB or <C-n>. But how do I get them to expand? <C-k> does not work, but I don't understand why. ======== .vimrc: ======== .... " Plugin key-mappings. imap <C-k> <Plug>(neocomplcache_snippets_expand) smap <C-k> <Plug>(neocomplcache_snippets_expand) inoremap <expr><C-g> neocomplcache#undo_completion() inoremap <expr><C-l> neocomplcache#complete_common_string() " Recommended key-mappings. " <CR>: close popup and save indent. inoremap <expr><CR> neocomplcache#smart_close_popup() ."\<CR>" " <TAB>: completion. inoremap <expr><TAB> pumvisible() ? "\<C-n>" : "\<TAB>" " <C-h>, <BS>: close popup and delete backword char. inoremap <expr><C-h> neocomplcache#smart_close_popup()."\<C-h>" inoremap <expr><BS> neocomplcache#smart_close_popup()."\<C-h>" inoremap <expr><C-y> neocomplcache#close_popup() inoremap <expr><C-e> neocomplcache#cancel_popup() ...

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• How to set which IP to use for a HTTP request?

  - by GetFree

  This is probably a silly question. I'm doing some http requests using wget from the command line, and I want those connections to be made through one specific IP of the 4 IPs my server has. Those http requests go to one specific range of IPs so I only want those to be routed differently. The 4 interfaces in my server are eth0, eth0:0, eth0:1, eth0:2. I tried with the following command: route add -net 192.164.10.0/24 dev eth0:0 But when I see the routing table it says: Destination Gateway Genmask Flags MSS Window irtt Iface 192.164.10.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 The interface is set to eth0 not eth0:0 as my command says. What am I doing wrong?

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• DPM - Monitoring is green, Protection has error and Latest rec point is old. How do I interpret that?

  - by LosManos

  How do I read the DPM info in this case? Monitoring says Failed but Protection shows Ok while having a Latest recovery point from last year. Under Monitoring tab I have Failed for Source | Computer | Protection group | Start time Computer\System Protection | MyServerName | Recovery point | 2014-06-09 19:00:00 which shows me that something happened last night. But under Protection tab everything is green. Here I have Protection group member | | Protection status Protection group ..name.. Computer: MyServerName Computer\System protection Bare metal recovery OK ... Latest recovery point: 2013-12-12 06:32:54 My guess is that backup failed last night once, but succeeded later. It then found out that there hasn't been any change since sometime last year and leave it be and flags Ok.

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• Google Apps: MX records for zonefile

  - by 23tux

  Hi everybody, I have a question about using Google Apps for handling emails. I don't want to set up a whole entire mail system on my server, so I decided to use Google Apps. The ownership of my domain is approved, and now I'm trying to change the MX records in the zone file of my domain. But I think I'm doing wrong, it doesn't work. I want to use mail.mydomain.com as a adress to the mail server for POP, SMTP and IMAP. My zone file looks like this: $TTL 86400 @ IN SOA ns1.first-ns.de. postmaster.robot.first-ns.de. ( 2011011700 ; serial 14400 ; refresh 1800 ; retry 604800 ; expire 86400 ) ; minimum @ IN NS robotns3.second-ns.com. @ IN NS robotns2.second-ns.de. @ IN NS ns1.first-ns.de. @ IN A 111.111.111.111 localhost IN A 127.0.0.1 www IN A 111.111.111.111 ftp IN CNAME www loopback IN CNAME localhost mail IN CNAME @ relay IN CNAME www @ IN MX 10 ALT1.ASPMX.L.GOOGLE.COM. @ IN MX 10 ASPMX3.GOOGLEMAIL.COM. @ IN MX 10 ASPMX2.GOOGLEMAIL.COM. @ IN MX 10 ASPMX.L.GOOGLE.COM. @ IN MX 10 ALT2.ASPMX.L.GOOGLE.COM. I hope someone can figure out, what's wrong with this configuration. When I start a ping on mail.mydomain.org I get an answer from 111.111.111.111 and not from the google server ALT1.ASPMX.L.GOOGLE.COM. thx, tux

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• Sending eMails in a external subnet in vmware ESXi

  - by user80658

  This might be a bit hard for me to explain - and it is a pretty individual situation. I got a native server at Hetzner (www.hetzner.de). The public IP is 88.[...].12. I got ESXi running on this server. I can access the esxi console by the public ip, but none of the virtual machines. That's why I bought a public subnet with 8 (6 usable) IPs (46.[...]) and an additional public ip (88.[...].26). This additional public ip belongs to the first virtual maschine - a firewall appliance - which is connected to the WAN. This need to be done this way - since it is the official way by hetzner. My 46. subnet is behind the firewall. I got a virtualmin server with dovecot imap/pop3 server. When sending a email, most provider (gmail) will accept those mails, but a lot will put it into spam (aol). My theory is: The MX line of my domain says of course the ip of the virtual machine (46.[...]), but in the raw email it says that email is sent by the ip of the firewall (88.[...].26), which doesnt sound trustworthy. A solution would be if the firewall could handle mail, but it simply cant. How can I prevent this problem? Thanks.

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• Unable to access internet if wireless enabled

  - by balki

  The following is my route output. eth0 is my wired network and eth1 is my wireless network. Only wired one has access to internet. If I enable wireless, I am not able to access internet, it tries to access via eth1 and I get 404 page of the wireless router. Why does eth1 have higher preference though default is eth0 (link)? [balakrishnan@mylap ~]$ route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface default 10.26.0.1 0.0.0.0 UG 0 0 0 eth0 10.26.0.0 * 255.255.192.0 U 1 0 0 eth0 link-local * 255.255.0.0 U 1000 0 0 eth0 192.168.1.0 * 255.255.255.0 U 9 0 0 eth1

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• Ubuntu 12.04 3.2 Kernel showing incorrect "cache size" in cpuinfo?

  - by Tom G

  2x Xeon E5620 . 16 Cores altogether. /proc/cpuinfo shows cache is only @ 4096kb According to intel this should have 12MB of "smart cache". Doing searched for E5620 and CPUinfo shows the correct number: cache size : 12288 KB However mine shows this: processor : 15 v endor_id : GenuineIntel cpu family : 6 model : 44 model name : Intel(R) Xeon(R) CPU E5620 @ 2.40GHz stepping : 2 microcode : 0x1 cpu MHz : 2400.104 cache size : 4096 KB fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush mmx bogomips : 4800.20 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual Any idea on why it shows like it's missing 8MB in CPU cache? .

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• Ubuntu 10.10 and Windows 7 (TrueCrypt) Multi-boot Problems

  - by Samuel Taylor

  I have now been searching days for a solution but have found nothing. I have Ubuntu 10.10 and Windows 7 with TrueCrypt as a multi-boot. It was working fine for a few weeks until I needed to reinstall Ubuntu. If I have the boot flag on the partition where Windows 7 is install (This is where the boot flags was when working before.), it boots fine in to Windows 7 but when pressing Esc it can't find grub2. If I have the boot flag on the partition where Ubuntu is install, it boots fine in to Ubuntu (by pressing Esc or typing the password) but unable to access Windows. I have tried reinstalling TrueCrypt Boot loader and repairing the header but it have no affect. My Partitions: sda1 - Windows 7 Recovery (GRUB2) sda2 - Windows 7 (TrueCrypt Boot Loader) sda3 - Ubuntu 10.10 (/) sda4 - Extended sda5 - Swap sda6 - Ubuntu (/home) Does anyone have any ideas? Thanks Sam

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• How to list down hosts with nmap 5.51

  - by Wild Bill

  I was using nmap 5.21 with the -PN, -F and --reason flags in version 5.21. I was outputting the results to an XML file. It would list ALL hosts (say I gave it a /24 subnet to scan. I then updated to 5.51 and ran the exact same command, but it no longer lists down hosts, just ones that are up. Is there a new flag to list down hosts? OR did this get removed in 5.51? My full options are: -sS -n -PN -SV -F --reason I've also used and removed --open but it will not list down hosts in my XML output.

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• Apache mod_proxy

  - by mhouston100

  Uggh, I'm spewing that I can't figure this out, I'm so frustrated: <VirtualHost *:80> servername domain1.com.au ServerAdmin webmaster@localhost DocumentRoot /var/www/html ErrorLog ${APACHE_LOG_DIR}/error.log CustomLog ${APACHE_LOG_DIR}/access.log combined <Proxy *> Order Allow,Deny Allow from all </Proxy> RewriteEngine on ReWriteCond %{SERVER_PORT} !^443$ RewriteRule ^/(.*) https://%{HTTP_HOST}/$1 [NC,R,L] </VirtualHost> <VirtualHost *:443> servername domain1.com.au SSLEngine on SSLCertificateFile /etc/apache2/ssl/owncloud.pem SSLCertificateKeyFile /etc/apache2/ssl/owncloud.key DocumentRoot /var/www/html </VirtualHost> <VirtualHost *:*> Servername domain2.com.au ProxyRequests Off <Proxy *> Order deny,allow Allow from all </Proxy> ProxyPass / https://192.168.1.12/ ProxyPassReverse / https://192.168.1.12/ </VirtualHost> Not sure if it's clear what I'm trying to do, but I've read and read and READ, I still can't figure it out. Basically I have a working Apache server with a rewrite to force HTTPS, as seen in the first two VirtualHost entries. I now have a webmail service I set up on another server, under another domain name, however I only have one incoming public IP address. So I'm trying to have any incoming requests for the second domain to be proxied to the other server to access the webmail, whether its port 80 or 443. IMAP and POP3 are no problems, I can just forward the ports directly to the correct server. The results of the above configuration is that requests to domain2.com.au (port 80 or 443) are forwarded to https://domain1.com.au. Am I headed in the right direction?

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• LXC Container Networking

  - by digitaladdictions

  I just started to experiment with LXC containers. I was able to create a container and start it up but I cannot get dhcp to assign the container an IP address. If I assign a static address the container can ping the host IP but not outside the host IP. The host is CentOS 6.5 and the guest is Ubuntu 14.04LTS. I used the template downloaded by lxc-create -t download -n cn-01 command. If I am trying to get an IP address on the same subnet as the host I don't believe I should need the IP tables rule for masquerading but I added it anyways. Same with IP forwarding. I compiled LXC by hand from the following source https://linuxcontainers.org/downloads/lxc-1.0.4.tar.gz Host Operating System Version #> cat /etc/redhat-release CentOS release 6.5 (Final) #> uname -a Linux localhost.localdomain 2.6.32-431.20.3.el6.x86_64 #1 SMP Thu Jun 19 21:14:45 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux Container Config #> cat /usr/local/var/lib/lxc/cn-01/config # Template used to create this container: /usr/local/share/lxc/templates/lxc-download # Parameters passed to the template: # For additional config options, please look at lxc.container.conf(5) # Distribution configuration lxc.include = /usr/local/share/lxc/config/ubuntu.common.conf lxc.arch = x86_64 # Container specific configuration lxc.rootfs = /usr/local/var/lib/lxc/cn-01/rootfs lxc.utsname = cn-01 # Network configuration lxc.network.type = veth lxc.network.flags = up lxc.network.link = br0 LXC default.confu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:12:30:f2 brd ff:ff:ff:ff:f #> cat /usr/local/etc/lxc/default.conf lxc.network.type = veth lxc.network.link = br0 lxc.network.flags = up #> lxc-checkconfig Kernel configuration not found at /proc/config.gz; searching... Kernel configuration found at /boot/config-2.6.32-431.20.3.el6.x86_64 --- Namespaces --- Namespaces: enabled Utsname namespace: enabled Ipc namespace: enabled Pid namespace: enabled User namespace: enabled Network namespace: enabled Multiple /dev/pts instances: enabled --- Control groups --- Cgroup: enabled Cgroup namespace: enabled Cgroup device: enabled Cgroup sched: enabled Cgroup cpu account: enabled Cgroup memory controller: /usr/local/bin/lxc-checkconfig: line 103: [: too many arguments enabled Cgroup cpuset: enabled --- Misc --- Veth pair device: enabled Macvlan: enabled Vlan: enabled File capabilities: /usr/local/bin/lxc-checkconfig: line 118: [: -gt: unary operator expected Note : Before booting a new kernel, you can check its configuration usage : CONFIG=/path/to/config /usr/local/bin/lxc-checkconfig Network Config (HOST) #> cat /etc/sysconfig/network-scripts/ifcfg-br0 DEVICE=br0 TYPE=Bridge BOOTPROTO=dhcp ONBOOT=yes #> cat /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0 ONBOOT=yes TYPE=Ethernet IPV6INIT=no USERCTL=no BRIDGE=br0 #> cat /etc/networks default 0.0.0.0 loopback 127.0.0.0 link-local 169.254.0.0 #> ip a s 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:12:30:f2 brd ff:ff:ff:ff:ff:ff inet6 fe80::20c:29ff:fe12:30f2/64 scope link valid_lft forever preferred_lft forever 3: pan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN link/ether 42:7e:43:b3:61:c5 brd ff:ff:ff:ff:ff:ff 4: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN link/ether 00:0c:29:12:30:f2 brd ff:ff:ff:ff:ff:ff inet 10.60.70.121/24 brd 10.60.70.255 scope global br0 inet6 fe80::20c:29ff:fe12:30f2/64 scope link valid_lft forever preferred_lft forever 12: vethT6BGL2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether fe:a1:69:af:50:17 brd ff:ff:ff:ff:ff:ff inet6 fe80::fca1:69ff:feaf:5017/64 scope link valid_lft forever preferred_lft forever #> brctl show bridge name bridge id STP enabled interfaces br0 8000.000c291230f2 no eth0 vethT6BGL2 pan0 8000.000000000000 no #> cat /proc/sys/net/ipv4/ip_forward 1 # Generated by iptables-save v1.4.7 on Fri Jul 11 15:11:36 2014 *nat :PREROUTING ACCEPT [34:6287] :POSTROUTING ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A POSTROUTING -o eth0 -j MASQUERADE COMMIT # Completed on Fri Jul 11 15:11:36 2014 Network Config (Container) #> cat /etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp #> ip a s 11: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 02:69:fb:42:ee:d7 brd ff:ff:ff:ff:ff:ff inet6 fe80::69:fbff:fe42:eed7/64 scope link valid_lft forever preferred_lft forever 13: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever

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• rsync to ONLY keep files in destination that have been removed from source

  - by David Corley

  We use rsync to copy filesystem contents from one machine to another as a backup. We first run MACHINE-X-MACHINE-Y rsync for a straight backup with the --delete and --delete-excluded switches We also run an internal Rsync between the MACHINE-Y destination, and another folder on MACHINE-Y with either of the delete flags. This maintains a non-destructive copy in the event someone inadvertently deletes a file on MACHINE-X. However, it also has the overhead of being a complete copy of what has already been synchronized. Ideally I want to be able to run the non-destructive rsync in such a way that the destination ONLY receives the deleted files and so avoids unnecessary duplication . Is there any way to do this?

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• Extracting httpdocs from Plesk Panel 9.5.4 Webserver backup file

  - by Paddington

  Good day, I am having problems manually extracting domains from Plesk 9.5 backup that was FTPed onto my back up server. I have followed the article http://kb.parallels.com/en/1757 using method 2. The problem is here: zcat DUMP_FILE.gz DUMP_FILE My backup file CP_1204131759.tar is a tar archive and zcat does not work with it. So I proceed to run the command: cat CP_1204131759.tar CP_1204131759. But when I try # cat CP_1204131759 | munpack I get an error that munpack did not find anything to read from standard input. I went on to extract the tar backup file using the xvf flags and got a lot of files (20) similar to these ones: CP_sapp-distrib.7686-0_1204131759.tgz CP_sapp-distrib.7686-35_1204131759.tgz CP_sapp-distrib.7686-6_1204131759.tgz How best can I extract the httpdocs of a domain from this server wide Plesk 9.5.4 backup?

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• Where to set java heap options (e.g. -Xmx) for Tomcat 6 under Ubuntu 9.04?

  - by Chris

  I'm running Tomcat using the tomcat6 package from Ubuntu 9.04, which makes a daemon out of Tomcat using jsvc. I'd like to know the proper way to set Java heap options like -Xmx for Tomcat. I'd like to put the configuration wherever is most stylistically correct, and wherever is least likely to be overwritten by Ubuntu package updates. The options I see right now: Hard-code them somewhere in /etc/init.d/tomcat6. Hard-code them somewhere in /usr/share/tomcat6/bin/catalina.sh. Create a line in /usr/share/tomcat6/bin/startup.sh to set CATALINA_OPTS to have the desired flags, and then export CATALINA_OPTS as an environment variable. (This looks like it will get picked up by catalina.sh.) The last option sounds like the best one, and it's advocated (without explanation of why) at http://serverfault.com/questions/121038/increasing-javas-heapspace-in-tomcat-startup-script. But I wanted to get a second opinion. Anyone want to confirm that there isn't a better way?

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• Filtering ToDo List in Outlook 2010 with multiple Exchange accounts

  - by David LaRocque

  I'm trying to figure out how to get the ToDo list filtered for just one account? I've tried customizing the view, and using the advanced filter to get just one Oulook Data file, but once I do that the filter goes bonkers and I get all sorts of results! I know it's a combination of email flags and true tasks, and tried combining filters to pull those conditions together, and simply can't get it to cooperate. Before 2010, when the only way to get multiple mailboxes was to add additional mailboxes to the primary account, the task list pulled from just the primary account - but of course, the secondary accounts are not cached and available offline.

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• Cant remove/delete symlink

  - by user477519

  I have tried to create a symlink and it threw this error: ln: accessing `.test': Permission denied Now I can't unlink or delete the symlink file. Tried Googling for help but could not find a solution. Please find the results of following commands. stat .test : File: `.test'stat: cannot read symbolic link `.test': Permission denied Size: 26 Blocks: 0 IO Block: 16384 symbolic link Device: 1fh/31d Inode: 312075453 Links: 1 Access: (0777/lrwxrwxrwx) Uid: (11160/ chatt) Gid: (11307/ pgr) Access: 2012-11-12 11:36:51.167327500 +0000 Modify: 2012-11-12 11:36:51.163331700 +0000 Change: 2012-11-12 11:36:51.163331700 +0000 Birth: - chattr -i .test: chattr: Permission denied while trying to stat .test lsatter .test lsattr: Operation not supported While reading flags on .test Any help would be appreciated. Thanks

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• What are the typical methods used to scale up/out email storage servers?

  - by nareshov

  Hi, What I've tried: I have two email storage architectures. Old and new. Old: courier-imapds on several (18+) 1TB-storage servers. If one of them show signs of running out of disk space, we migrate a few email accounts to another server. the servers don't have replicas. no backups either. New: dovecot2 on a single huge server with 16TB (SATA) storage and a few SSDs we store fresh mails on the SSDs and run a doveadm purge to move mails older than a day to the SATA disks there is an identical server which has a max-15min-old rsync backup from the primary server higher-ups/management wanted to pack in as much storage as possible per server in order to minimise the cost of SSDs per server the rsync'ing is done because GlusterFS wasn't replicating well under that high small/random-IO. scaling out was expected to be done with provisioning another pair of such huge servers on facing disk-crunch issues like in the old architecture, manual moving of email accounts would be done. Concerns/doubts: I'm not convinced with the synchronously-replicated filesystem idea works well for heavy random/small-IO. GlusterFS isn't working for us yet, I'm not sure if there's another filesystem out there for this use case. The idea was to keep identical pairs and use DNS round-robin for email delivery and IMAP/POP3 access. And if one the servers went down for whatever reasons (planned/unplanned), we'd move the IP to the other server in the pair. In filesystems like Lustre, I get the advantage of a single namespace whereby I do not have to worry about manually migrating accounts around and updating MAILHOME paths and other metadata/data. Questions: What are the typical methods used to scale up/out with the traditional software (courier-imapd / dovecot)? Do traditional software that store on a locally mounted filesystem pose a roadblock to scale out with minimal "problems"? Does one have to re-write (parts of) these to work with an object-storage of some sort - such as OpenStack object storage?

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• Unified inbox shows twice on Thunderbird

  - by That Help Vampire Guy

  I'm using Thunderbird 24. If I show folders in Unified mode, my inbox folder shows up twice. If I choose the "All" folders mode, I see only one inbox. The issue started when I was using Ubuntu 12.04, but now I'm on Fedora 19. (I have migrated the folders on /home). I do remember having it not-duplicated, but then it started while still on Ubuntu. I noticed it when using the Converation plugin, but I had previously used the plugin without it happening. I have disabled the plugin and it persists. What I have tried If I close Thunderbird, rename the .thunderbird folder on my /home to something else, then it will create a new config profile, I have to set up everything again, and then it works as expected, see images below: Before resetting Unified vs All Folders After resetting Unified vs All Folders (I'm trying to avoid resetting the profile and creating a fresh new one, because the server -- MS Exchange -- doesn't support IMAP labels, so I'd lose all the tags on my messages, and I have organized it based on tags instead of folder).

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• How to turn on/turn off leds by terminal?

  - by GarouDan

  I would like turn on/turn off some of my leds running a command on linux. I use Ubuntu 12.04 LTS. I tried xset led named "Scroll Lock" xset led named "Num Lock" xset led 2 (this is the number of Scroll Lock as `xset q` says) xset led 1 but nothing works. Tried setleds +num setleds +scroll but I got a error message saying Error reading the current settings of flags. Maybe you're not on the console? (I was in a terminal). So, how can I perform this?

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• ffmpeg error while segmenting

  - by Tommy Ng

  I'm using ffmpeg and segmenter on Ubuntu 10.04 to create the transport stream from flv/h264 video files and then segment the ts segments for ipad streaming. Some ts files show an error with segmenter - Output #0, mpegts, to '29': Stream #0.0: Video: 0x0000, yuv420p, 480x360, q=2-31, 90k tbn, 25 tbc Stream #0.1: Audio: 0x0000, 0 channels, s16 [mpegts @ 0x11f4ac0]sample rate not set Could not write mpegts header to first output file my ffmpeg command for creating the ts file - ffmpeg -i 1.flv -f mpegts -acodec libfaac -ar 48000 -ab 64k -s 480x360 -vcodec libx264 -b 192k -flags +loop -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 -subq 5 -trellis 1 -refs 1 -coder 0 -me_range 16 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -bt 200k -maxrate 192k -bufsize 192k -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 -level 30 -aspect 480:360 -g 30 -async 2 -y 1.ts my segmenter command - segmenter 1.ts 10 1 1.m3u8 path/to/streams/

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• Could 0x800CCC0E in Outlook be caused by bad wireless connection?

  - by AndrejaKo

  I have a computer connected to a WiFi access point/router/modem. Sometimes, I get page not found errors and similar when opening a browser window, sometimes pings fail and it looks like the router's signal isn't very good. On the other hand, I get around 4 bars of signal strength in windows and graph looks good in Inssider. I also never get dropped connection to the router. My main problem is that I often get errors (such as 0x800CCC0E) in Outlook 2010 that after some searching appear to be connected to bad server connection. I'm using GMail over IMAP and all settings are correct. I didn't have similar errors on my previous router, but I'm not 100% sure that they appeared after switching to current one. It may have worked for some time without errors. There are also around 3000 messages on the server and the size of mailbox is around 12 GiB, which may contribute to the problems. On the other hand, there are at least 24 other networks in the 2.4 GHz range which I'm using and the number may have increased since I switched routers. Should I try solving this by getting a router with stronger signal?

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