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  • iptables: Allow only HTTP access for web browsing

    - by user1448260
    Have a linux box, want it locked down but just be able to surf internet on it. Why is this script blocking http too? #!/bin/sh # # iptables -F # #Set default policies for INPUT, FORWARD and OUTPUT chains # iptables -P INPUT DROP iptables -P FORWARD DROP iptables -P OUTPUT DROP # # Allow TCP connections on tcp port 80 # iptables -A INPUT -i eth0 -p tcp --dport 80 -m state --state NEW,ESTABLISHED -j ACCEPT iptables -A OUTPUT -o eth0 -p tcp --sport 80 -m state --state ESTABLISHED -j ACCEPT # # Set access for localhost # iptables -A INPUT -i lo -j ACCEPT # # List rules # iptables -L -v

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  • Method to calculate downtime percentage

    - by Chris
    I need a calculation to work out the downtime percentage of a server. I am making a script that runs via cron every minute to check the uptime of a remote server. The two values I have to play with are number of checks run and times the checks failed (outages). Is this a plausible way of calculating it? I am thinking it must be but can't be too sure as my Maths skills are slipping away from me with age!

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  • Configuration to point an X tty to a separate system?

    - by buu700
    Specifically, I have an Ubuntu 10.04 system with a headless Ubuntu 12.04 virtual machine, and I'm looking for a way to have it set up so pressing ctrl+alt+F8 will take me into another X client which is connected to an X server on the vm (with gdm appropriately displayed at startup, etc.). As in, my startup script should spin up the headless machine and then immediately perform a "startx" pointed at the vm.

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  • Remove USB device from command line

    - by Luke
    I'm constructing a backup script for Windows 7, and the last action I want it to perform is to safely "remove" the USB drive that it is backing up to. I am under the impression that plugging the drive into the SAME USB port all the time will keep the same DEV_ID, correct me if I'm wrong. With a Command Line (or PowerShell), how can I tell Windows to safely remove the hardware automatically without user input? Just as a place holder, other OSes that may have a way to do this would be great to know as well

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  • How to install Reddit Open Source on a web server

    - by Shubz
    I have been playing around with the Reddit open source software and have been getting no where fast. I was wondering if anybody can instruct me on how to install the software on a web server. I know how to install normal php scripts etc, but I've never installed a software such as a python or rails script before. I'm not very good with commands but I know how to run them. If that makes sense. Thanks!

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  • Getting users LastLogonTime on Live@edu using powershell

    - by Eagles
    I am trying to get a csv file of all users in a Live@edu environment with a LastLogonTime, but I am having some issues here is my script: foreach ($i in (Get-Mailbox -ResultSize unlimited)) { Get-MailboxStatistics -LastLogonTime $i.DistinguishedName | where {$_.LastLogonTime} | select-object MailboxOwnerID,Name,LastLogonTime | export-csv -path "c:\filepath\UserLastLogon.csv" } I get the error: A positional paparameter cannot be found that accepts argument '[email protected],OU=domain.edu,OU=Microsoft Exchange Hosted Organizations,DC=prod,DC=exchangelabs,DC=com'. +Category Info: InvalidArgument: (:) [Get-MailboxStatistics], ParameterBindingException +FullyQualifiedErrorId : PositionalParameterNotFound,Get-MailboxStatistics Any help would be great!

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  • VirtualBox no network access

    - by Frantumn
    I'm on a work machine, setting up a virtual ubuntu image using virtual box. After I installed the image, I can't seem to connect to the internet. If I look at network and sharing center on my host OS (W7) I see that the VirtualBox Host-Only Network reads as "no network access" How can I set it up so that it uses the same network as the host OS. UPDATE! Okay, is there a way I can tell virtual box host-only network to use a proxy script?

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  • Export MS SQL database as *.dbschema

    - by jjczopek
    We have a production database and visual studio 2010 database project. We had to make some changes in database schema. Unfortunately we don't have previous database schema file for production database. Is there a way to export existing database schema as *.dbschema file, preferably from Microsoft SQL Server Management Studio (2008 R2)? This way we could run schema comparison and generate update script.

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  • serving files via subdomain

    - by muntasir
    does serving files like images via subdomain speed up loading speed. i read somewhere that static files like images, java script served via cookieless domain does mean something regarding website speed.

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  • Rsync and Lazy mode ?

    - by fabien-barbier
    Since transferring or copying a file that is being used sometimes causes corruption of the transferred file, can we define a time interval in which Rsync checks each file in a given directory to see if there is a change within that time interval ? Files that are not changed during that interval will be transferred, while those that have changes will not. Can I do that with rsync ? Or another tool ? Is there a script to add this functionality to Rsync ? Thanks

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  • How to re-run one line of a PowerShell cmdlet if it fails

    - by pansal
    I wrote a PowerShell script which is supposed to send emails automatically, but sometimes the email won't send out due to a network issue. Here is how I'm sending email: $smtp_notification.Send($mail_notification) Here are the error logs: Exception calling "Send" with "1" argument(s): "Failure sending mail." At line:1 char:24 + $smtp_notification.Send <<<< ($mail_notification) + CategoryInfo : NotSpecified: (:) [], MethodInvocationException + FullyQualifiedErrorId : DotNetMethodException Is there anyway to re-run the sending line when I met this failure? Can anyone give me some suggestions please?

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  • How to change the default terminal emulator on Windows (cmd)?

    - by alex
    Is it possible to change the default terminal emulator on Windows (7 and 8 in particular) from cmd to, for example, Console2 or ConEmu? In essence, I want all command line tools, whether launched by double clicking, from "Run" or by other processes to use the custom terminal. This is a trivial matter on Linux, is it even possible on Windows? It would be especially helpful if this could be done via a script.

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  • Add Clamd as a service to CentOS?

    - by Josh
    As I understand I think I need to add something to init.d, but I am not sure what to add. At the moment to start clamav I have to do clamd start. I would like it as a service so I can start it on run level 3 as a service. I realize I could probably do this through a shell script in the right runlevel, but I would like to be able to use chkconfig to configure it.

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  • How do I create a bridged virtual network for libvirt+KVM+ubuntu-server the easy way?

    - by Arthur Ulfeldt
    I see lots of documentation on how to manually set up a network bridge and then manually add vm's tun devices to these bridges and then write a shell script that glues it all together. lots of work, very manual, and not impressive. On the other hand if you want to use NAT to KVM+libvirt VMs to the network you just click the new network button in the virt-manager gui and relax. Am I missing "the easy way" of causing a VM to share the physical network with the host?

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  • What is a 8086 relocatable?

    - by gerrit
    I'm running some Fortran software (LBLRTM) and a shell-script that prepares input generates a number of files with names TAPE3, TAPE4, etc. For debugging purposes, I used file to identify the file type. file tells me: TAPE3: 8086 relocatable (Microsoft) My guess is that file is wrong here, and that it's just a binary file that happens to look like a 8086 relocatable. But what is a 8086 relocatable?

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  • Command-line tool to deduplicate a single humongous file?

    - by romkyns
    I make regular snapshots of my VM using a nightly script. These backups are compressed using WinRAR and do shrink considerably, but I suspect it's not as efficient as had the file had been deduplicated first (just a hunch which I'm hoping to test). So instead of compressing the VHD itself, I would like to deduplicate the single file first, and then compress the output of the deduplicator. Is anyone aware of such a CLI tool?

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  • vim: remove previous code indentation and convert to another

    - by ramgorur
    I have a c project with multiple files (more than 100), the codes are written in Whitesmiths style, but I want to change them into K&R style indentation. Is it possible to do using vim in an automated way ? For example I have a emacs-lisp script to achieve this -- (progn (find-file "{}") (mark-whole-buffer) (setq indent-tabs-mode nil) (untabify (point-min) (point-max)) (indent-region (point-min) (point-max) nil) (save-buffer)) I was wondering if there is a similar trick that could be done with vim.

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  • How do I configure a guest VM's static IP address automatically in Citrix XenServer?

    - by Kev
    To facilitate automation of guest VM provisioning, how do I set (in a script) the IP address on a guest VM's NIC (or NIC's) once a new VM has booted? Is there a way to "inject" netsh commands via the Citrix guest OS tools (for Windows for example) once the host has started? Or can this be done via the Citrix API/SDK or the xe tools? These are windows 2008 servers that have been sysprep'd so when the boot for the first time they have no IP address.

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  • How to fix SCRIPT_NAME with PHP-FPM and Apache's mod_fastcgi?

    - by Kyle MacFarlane
    I have the following in my Apache conf to get PHP-FPM working: FastCgiExternalServer /srv/www/fast-cgi-fake-handler -host 127.0.0.1:9000 AddHandler php-fastcgi .php AddType text/html .php Action php-fastcgi /var/www/cgi-bin Alias /var/www/cgi-bin /srv/www/fast-cgi-fake-handler DirectoryIndex index.php This works fine except that SCRIPT_NAME is always /var/www/cgi-bin and some scripts use SCRIPT_NAME to work out the location of the current script (vBulletin). Google has plenty of solutions for Nginx but not a word for Apache.

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