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• zeroing a disk with dd vs Disk Utility

  - by jdizzle

  I'm attempting to zero a disk on my Mac OS X machine. I'm going for complete zeros and unformatted, so I think of dd. Unfortunately the maximum throughput I've managed to get out of dd is 7MB/s. Just for grins I tried disk utility and it has a throughput of 19MB/s. What gives? I've tried changing the bs option on dd to all sorts of values, but it still hovers around 7MB/s. Why is disk utility so much faster?

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• Is it possible to run bash builtin from non bash script?

  - by tig

  Is it possible to run for example history -w for underlying bash shell from ruby script? Or better is it possible to run builtin command for bash shell knowing only its pid? The only way I found is to trap signal like trap "history -w" SIGUSR1 and then send signal to process, but I am not sure that it is a good practice and USR1 is not used by bash, also this way I can execute max 2 commands (USR1 and USR2). And I have to define trap before using it. I am on Mac so there is not SIGRTMIN..SIGRTMAX.

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• Foward slash in kibana 3 query

  - by G Mawr

  I'm trying to add a query that will match a request that ends with a slash, like this one: n.n.n.n - - [16/Oct/2013:16:40:41 +0100] "GET / HTTP/1.1" 200 25058 "-" "Mozilla/5.0 (iPad; CPU OS 7_0_2 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11A501 Safari/9537.53" I'm using the Lucene query type. If my query is set to *, I see the event. If I set it to request:"css", I see CSS requests, as expected. However, all of the following yield no results: request:"/" request:"\/" request:"\\/" I tried a Lucene regular expression, with no luck: request:/\// I note that someone else is getting what appears to be a similar issue, although that's on Kibana 2: https://github.com/rashidkpc/Kibana/issues/401 How can I query for requests that end with a / character?

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• Mouse cursor in Terminal?

  - by marienbad

  I use Mac OS X Terminal.app. But the answer to this would probably apply to any typical UNIX-ish terminal emulator in a graphical environment. Question -- what do I do to: Use my mouse cursor to click on a character-position in the current line of the terminal, and have the terminal's cursor jump to that spot? Typically, you have to hold down an arrow key to move to the correct cursor position. If you're pasting in a long string of text at the shell prompt, or working in an editor like VI, this can take a long time. I know editors have other navigation keys like jump-words, but I like my mouse cursor.

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• How can I send an email from Mail.app to Outlook with an attachment that does not embed into the email body?

  - by JAG2007

  I'm using Mail.app (on Mac OS X 10.6) and when I send an email to users on PC Outlook, with an attached image, they get the email as an image embedded into the body, not as an attachement. I even tried clicking "view as icon" before sending the attachment from Macmail, but that made no difference. I also tried this myself, sending from Mail.app over to my PC's Outlook, and I do get that same problem. In Outlook the image is not coming through as an attachment, but as an image embedded into the body of the email. The reason this is an issue primarily is because the user is then unable to click "save as" and has to actually copy and paste it into some other program, which means the file is converted from jpg or png to the bmp format. But beyond that, most of my recipients don't even know how to copy and paste it into another program to save it that way anyway. They need the "save attachment as" functionality.

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• Setting up 802.1X wireless connection on OSX

  - by hizki

  I am an OSX user, I have Snow Leopard 10.6.5 and an updated AirPort. I am trying to connect to my university's wireless network, but it has a complex security that I am having trouble defining... Here there are instructions for connecting with Windows XP, Windows 7 and Linux. Can someone please instruct me what should I do to set up this network on my MAC? Thank you. P.S. I have had previous success in setting up this network, but I have no idea what I did that made it work. Since I updated my AirPort it worked only seldomly and very slowly... Before the update, even when it worked it never remembered my password.

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• Virtual NIC on VM couldn't ping externally after Vmotion

  - by ToreTrygg

  Today I vmotioned 5 MS SQL 2005 servers over to a new DRS Cluster. All SQL servers use the "Production_LAN" network and a single virtual NIC of type "VMXNET 3". The first 4 SQL VM (Windows 2003 Standard or Enterprise x32 bit) vmotioned over without a hitch. The last SQL VM I vmotioned (Windows 2003 Standard x64 bit R2) vmotioned over without error, but I upon completion, I could no longer ping the VM. I went into the VM and could not even ping the gateway, however I could ping the loopback. This SQL server is extremely busy in comparison with the previous 4 VM's. I restarted the server and it came back up with the virtual nic working just fine. The build of both servers (vmotioner and vmotionee) is ESX 4.0.0 175625 - So, pre-update 1. Should I suspect the network switch/VM for possibly not updating the mac table on the switch? Anybody else ever have this issue or know what may have caused it? Thank you!

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• Why would a server not send a SYN/ACK packet in response to a SYN packet

  - by codemonkey

  Lately, we've become aware of a TCP connection issue that is mostly limited to mac and Linux users who browse our websites. From the user perspective, it presents itself as a really long connection time to our websites (11 seconds). We've managed to track down the technical signature of this problem, but can't figure out why it is happening or how to fix it. Basically, what is happening is that the client's machine is sending the SYN packet to establish the TCP connection and the web server receives it, but does not respond with the SYN/ACK packet. After the client has sent many SYN packets, the server finally responds with a SYN/ACK packet and everything is fine for the remainder of the connection. And, of course, the kicker to the problem: it is intermittent and does not happen all the time (though it does happen between 10-30% of the time) We are using Fedora 12 Linux as the OS and Nginx as the web server.

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• seeking to upgrade my bash magic. help decipher this command: bash -s stable

  - by tim

  ok so i'm working through a tutorial to get rvm installed on my mac. the bash command to get rvm via curl is curl -L https://get.rvm.io | bash -s stable i understand the first half's curl command at location rvm.io, and that the result is piped to the subsequent bash command, but i'm not sure what that command is doing. My questions: -s : im always confused about how to refer to these. what type of thing is this: a command line argument? a switch? something else? -s : what is it doing? i have googled for about half an hour but not sure how to refer to it makes it difficult. stable : what is this? tl;dr : help me decipher the command bash -s stable to those answering this post, i aspire to one day be as bash literate as you. until then, opstards such as myself thank you for the help!

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• Chat client/server that offers certain options.

  - by MrStatic

  A few friends of mine and including me for the past few years have hosted an irc server on one of our dedicated servers. We use it for just personal reasons. We like the aspect of it that it allows private messages and chat rooms. Plus the ability to send/receive files and is cross platform (Linux/Mac/Windows/Mobile). Our domain is about to expire and we are looking to move onto something new. So we are looking for a chat client / server that offers the following: Chatroom (multiple people chatting together in the same box) File transfers Private messages Cross Platform (especially mobile ie: Blackberry and Android) We don't have to host it but that isn't out of the question Logging on the client side (we say a lot of crap and like to go back and quote said crap) SSL/TLS Some sort of encryption some of the stuff said/sent is of a sensitive nature ie: business nature

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• Copying OS X account settings to new user account

  - by Donna Crain

  Hi I hope someone can help me... I accidentally renamed my own user name on my mac running OS X 10.4.11 and tried renaming back to what it was but now I have two accounts (the one I want to use which has all my preferences, applications, mail boxes, etc etc) is it possible to copy my settings from my original into this new user name? When I open my computer it defaults to this new account but everything is setting up from new and I just need to get access to all my work documents, mail settings etc. If there is anyone who could help out, I would be very grateful. Thank you in advance.

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• Sound recognition software

  - by Cawas

  I'm looking for a software able to recognize an specific sound and then do some action. I want to leave my notebook close by the house intercom so when I hear someone ringing it, a very specific and unique sound, it will send me an email at my office or something. The main issue is that there's a lot of different noises there, but none would be as loud as the intercom for the specific place I've left the microphone. Is there any software out there able to do this? Hopefully with a mac version. I trust there's nothing closely related in this to speech or voice recognition technologies, and specially the softwares in there.

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• Colour output piped to less

  - by mmacaulay

  Operating system: Mac OS 10.6.2 I'd like to be able to see colour output when piping certain commands through less. Two examples: I've got ls aliased to ls --color=auto, so I'd like to be able to see colour when I do this: ls -l | less I've also got the color extension turned on in Mercurial, so I'd like to see colour output from: hg diff | less and hg st | less After some googling, it seems like some versions of less support either -r or -R to make this work, but no dice for me. I can't see anything in the man page that looks like what I need. (-r or -R SEEM to be the right options, but again, they don't seem to work)

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• Recommendations needed for email server and file sharing solutions.

  - by Abeansits

  I work at a relatively small company, around 30 people and we are now looking into a solution that can handle: File sharing. Email server. Calendar support. Around 30 users. Accessible from external network. Support for Windows XP (and above), Mac OS 10.6.3 and Ubuntu clients. When it comes down to security we don't have the experience to comment on that. I guess the de facto standard is good enough for us. Sorry if this is formulated as a n00b question, because it is. =) Any kind of pointer in the right direction will be appreciated. Thanks in advance! //Abean

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• Windows Server 2008 Active Directory DNS setup

  - by Mister IT Guru

  I have to setup a small windows network inside my bigger linux/mac infrastructure. In order to get the windows clients logging onto the domain, I have had to make the DC their primary DNS server, which seems to have worked. I would much prefer to have one DNS server running on my network, or at least one authoritative server running on the network. I have a USG 200 router/firewall and I can configure some static records for DNS, but I an not sure what I need to put in order to get DNS and AD working together, and hints and tips appreciated.

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• Network connectivity logs on OSX

  - by Stephen

  I'm trying to determine whether or not Macs store a log of network connectivity. Specifically, I'm trying to find out if one of my machines (Mac Tower, OSX 10.7.4, 2-2.26 GHz, 16 GB DDR3) lost connection to pinpoint an issue. This machine is on an external network where and the IT staff is not very helpful, so I'm trying to ensure that there were network issues rather than some other local issue on that particular machine. Can you pull network logs thru Console that show when a network connection was established and was disconnected?

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• Users not getting ip when connected through wifi,but wired connection getting ip in ddwrt router

  - by Kevin Parker

  I am having DD-WRT v24-sp2(05/08/11) running on Asus RT n 13 u B1 router,with dhcp on. But users not able to connect through wifi...its showing obtaining ip address and disconnects there after. Wired Devices are getting ip address and able to access internet.Wifi was working till yesterday,but all of a sudden it stopped working. on the ddwrt controlpanelsystem information under Wireless Clients mac address of clients that are trying to connect are appearing but soon it disappears. but no such issue with wired clients. Can any one please help me in fixing this..

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• Why am I getting this SVN can't move .svn/tmp/x to trunk/x error?

  - by Alex Waters

  I am trying to checkout into the virtualbox shared folder with svn 1.7 in ubuntu 12.04 running as a guest on a windows 7 host. I had read that this error was a 1.6 problem, and updated - but am still receiving the error: svn: E000071: Can't move '/mnt/hostShare/code/www/.svn/tmp/svn-hsOG5X' to '/mnt/hostShare/code/www/trunk/statement.aspx?d=201108': Protocol error I found this blog post about the same error in a mac environment, but am finding that changing the folder/file permissions does nothing. vim .svn/entires just has the number 12 - does this need to be changed? Thank you for any assistance! (just another reason for why I prefer git...)

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• How do I do a cross-platform backup/restore of a DB2 database?

  - by Pridkett

  I need to dump a couple of databases from DB2 for Mac and DB2 for Linux and then import the databases to DB2 for Windows. Unfortunately, when I try the standard backup and restore I get the following error: SQL2570N An attempt to restore on target OS "NT-32" from a backup created on source OS "?" failed due to the incompatability of operating systems or an incorrect specification of the restore command. Reason-code: "1". I've seen references to DB2 needing an IXF dump and import, but I can't find any solid information about how to do this without dozens of other steps. Any hints on how to do this in the least painful manner?

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• Send option/alt key press to OS X connected from Windows via VNC?

  - by sohocoke

  I recently started using a mac running Leopard Server remotely at work, using the RealVNC client to connect from my Windows XP workstation via the Leopard VNC server. As I need to do a fair amount of editing, I would like to have the keys mapped to the same positions as the macs I have been using for a long time. The Ctrl key works as Ctrl, and the Alt key works as Cmd, which is good, but I have had no success getting the Windows logo key to work as Option/Alt. It's seriously affecting my productivity in XCode and Terminal. Has anybody with the same setup solved this question, either by configuring Windows and/or the VNC client, or otherwise?

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• Give apache write access to DocumentRoot on dev server

  - by Abhi Beckert

  I've got apache running on my mac workstation (OS X 10.7, with the pre-installed copy of apache), and our web applications require write access to certain sections of the filesystem to run (usually just a tmp dir, but sometimes more than that). We have (literally) thousands of clients, and I want to be able to quickly grab a copy of any website's code, and have it "just work", however I always need to manually modify the unix permissions of specific directories after pulling a client's website out of source control (the list of directories varies from one client to another, as it has changed over the years). Since it's a dev server, firewalled off from the general internet, I would like to give apache/php write access to the entire DocumentRoot. How can I do this? I tried chmod 777 on the DocumentRoot, but if I create a directory inside it, the permissions are still 755 (owner: me, group: wheel). I think there should be a way to force all files created inside DocumentRoot to be 777 or perhaps 775, with the _www user added to the wheel group?

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• X11Forwarding on MacOSX (Leopard/Snow Leopard)

  - by Shyam

  Hi, I have some remote boxes, which are a bunch of Mac Mini's. I access them now through SSH, and it fits my needs to do the maintenance. In the past, I used X11Forwarding with Linux boxes, when I was still using Debian myself, and I was able to run a specific application as if it was natively present (Firefox). I haven't succeeded to do this yet, but I assume because of the BSD underneath the fancy Apple GUI should be able to do such a task similar. I am aware of the remote administration, but I rather keep access limited to SSH on these boxes for inbound connections. Background information about the why's, tips, advice and comments are all helpful! Thanks!

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• Removing DS_Store files and variants?

  - by Ron Gejman

  Hi, I am running an Ubuntu 10.04.1 LTS server. Frequently I open up files using AFP from my Mac. Inevitably this created .DS_Store files on the server (although for some reason they are named :2eDS_Store. However, it also creates variants on DS_Store files. These variants are often named similarly to other files in that directory. E.g.: ~$ ls total 60K -rw-r--r-- 1 tarakhovsky 16K 2010-11-30 18:28 :2eDS_Store drwx--S--- 4 tarakhovsky 4.0K 2010-11-08 13:58 :2eTemporaryItems/ lrwxrwxrwx 1 tarakhovsky 15 2010-10-19 17:44 bigdisk -> /media/bigdisk// ... drwxr-xr-x 3 tarakhovsky 4.0K 2010-11-03 18:24 Temporary Items/ drwxr-xr-x 3 tarakhovsky 4.0K 2010-11-30 01:34 tmp/ ... I've disabled creation of DS_Store files using: defaults write com.apple.desktopservices DSDontWriteNetworkStores true so hopefully this won't continue to occur—but I really want to get rid of all of the existing variants of DS_Store files already on the server. Any ideas as to why these variants are being created and how I can get rid of them all?

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• Why are my at jobs running immediately on OS X?

  - by Gabe

  I want to schedule events for exact times in Mac OS X. It seems like the 'at' command is the simplest way to do this. I have enabled atrun using the command: launchctl load -w /System/Library/LaunchDaemons/com.apple.atrun.plist To test at, I'm using the following one-line BASH script: echo 'foo' path/to/log.txt | at now + 2 minutes When I run the script, I get output like: job 17 at Sat May 15 12:57:00 2010 where '12:57:00' is indeed 2 minutes in the future. But the echo command executes immediately: the line 'foo' is added to log.txt right away. How can I make at work for me?

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• Configuring NAT and static IP on Cisco 877W

  - by David M Williams

  Hi all, I'm having trouble setting up a static IP reservation on a network. What I want to do is assign IP 192.168.1.105 to MAC address 00:21:5d:2f:58:04 and then port forward 35394 to it. If it helps, output from show ver says Cisco IOS software, C870 software (C870-ADVSECURITYK9-M), version 12.4(4)T7, release software (fc1) ROM: System bootstrap, version 12.3(8r)YI4, release software I have done this - service dhcp ip routing ip dhcp excluded-address 192.168.1.1 192.168.1.99 ip dhcp excluded-address 192.168.1.200 192.168.1.255 ip dhcp pool ClientDHCP network 192.168.1.0 255.255.255.0 default-router 192.168.1.1 dns-server 192.168.1.1 lease 7 ip dhcp pool NEO host 192.168.1.105 255.255.255.0 hardware-address 0021.5D2F.5804 ip nat inside source static tcp 192.168.1.105 35394 <PUBLIC_IP> 35394 extendable However, the machine is getting assigned IP address 192.168.1.101 not .105 ... any suggestions? Thanks !

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