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• I added some options to stop spam with Postfix, but now won't send email to remote domains

  - by willdanceforfun

  I had a working Postfix server, but added a few lines to my main.cf in a hope to block some common spam. Those lines I added were: smtpd_helo_required = yes smtpd_recipient_restrictions = reject_invalid_hostname, reject_unknown_recipient_domain, reject_unauth_pipelining, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, reject_rbl_client multi.uribl.com, reject_rbl_client dsn.rfc-ignorant.org, reject_rbl_client dul.dnsbl.sorbs.net, reject_rbl_client list.dsbl.org, reject_rbl_client sbl-xbl.spamhaus.org, reject_rbl_client bl.spamcop.net, reject_rbl_client dnsbl.sorbs.net, reject_rbl_client cbl.abuseat.org, reject_rbl_client ix.dnsbl.manitu.net, reject_rbl_client combined.rbl.msrbl.net, reject_rbl_client rabl.nuclearelephant.com, permit It appears my postfix is now receiving normal emails fine, and blocking spam emails. But when I now try to use this server myself to send to a remote domain (an email not on my server) I get bounced, with maillog saying something like this: Nov 12 06:19:36 srv postfix/smtpd[11756]: NOQUEUE: reject: RCPT from unknown[xx.xx.x.xxx]: 450 4.1.2 <[email protected]>: Recipient address rejected: Domain not found; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<[192.168.1.100]> Is that saying 'domain not found' for gmail.com? Why is that recipient address rejected? An output of my postconf-n is: alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases broken_sasl_auth_clients = yes command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix debug_peer_level = 2 html_directory = no inet_interfaces = all inet_protocols = all mail_owner = postfix mailbox_size_limit = 0 mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain mydomain = primarydomain.net myhostname = mail.primarydomain.net myorigin = $myhostname newaliases_path = /usr/bin/newaliases.postfix queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES relay_domains = $mydestination, primarydomain.net, secondarydomain.org sample_directory = /usr/share/doc/postfix-2.6.6/samples sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop smtpd_client_restrictions = permit_sasl_authenticated smtpd_helo_required = yes smtpd_recipient_restrictions = reject_invalid_hostname, reject_unknown_recipient_domain, reject_unauth_pipelining, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, reject_rbl_client multi.uribl.com, reject_rbl_client dsn.rfc-ignorant.org, reject_rbl_client dul.dnsbl.sorbs.net, reject_rbl_client list.dsbl.org, reject_rbl_client sbl-xbl.spamhaus.org, reject_rbl_client bl.spamcop.net, reject_rbl_client dnsbl.sorbs.net, reject_rbl_client cbl.abuseat.org, reject_rbl_client ix.dnsbl.manitu.net, reject_rbl_client combined.rbl.msrbl.net, reject_rbl_client rabl.nuclearelephant.com, permit smtpd_sasl_auth_enable = yes smtpd_sasl_path = private/auth smtpd_sasl_type = dovecot smtpd_sender_restrictions = reject_unknown_sender_domain soft_bounce = no unknown_local_recipient_reject_code = 550 virtual_alias_domains = mail.secondarydomain.org virtual_alias_maps = hash:/etc/postfix/virtual Any insight greatly appreciated. Edit: here is the dig mx gmail.com from the server: ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.17.rc1.el6_4.4 <<>> mx gmail.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 31766 ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 4, ADDITIONAL: 14 ;; QUESTION SECTION: ;gmail.com. IN MX ;; ANSWER SECTION: gmail.com. 1207 IN MX 5 gmail-smtp-in.l.google.com. gmail.com. 1207 IN MX 30 alt3.gmail-smtp-in.l.google.com. gmail.com. 1207 IN MX 20 alt2.gmail-smtp-in.l.google.com. gmail.com. 1207 IN MX 40 alt4.gmail-smtp-in.l.google.com. gmail.com. 1207 IN MX 10 alt1.gmail-smtp-in.l.google.com. ;; AUTHORITY SECTION: gmail.com. 109168 IN NS ns1.google.com. gmail.com. 109168 IN NS ns4.google.com. gmail.com. 109168 IN NS ns3.google.com. gmail.com. 109168 IN NS ns2.google.com. ;; ADDITIONAL SECTION: alt1.gmail-smtp-in.l.google.com. 207 IN A 173.194.70.27 alt1.gmail-smtp-in.l.google.com. 248 IN AAAA 2a00:1450:4001:c02::1b gmail-smtp-in.l.google.com. 200 IN A 173.194.67.26 gmail-smtp-in.l.google.com. 248 IN AAAA 2a00:1450:400c:c05::1b alt3.gmail-smtp-in.l.google.com. 207 IN A 74.125.143.27 alt3.gmail-smtp-in.l.google.com. 249 IN AAAA 2a00:1450:400c:c05::1b alt2.gmail-smtp-in.l.google.com. 207 IN A 173.194.69.27 alt2.gmail-smtp-in.l.google.com. 248 IN AAAA 2a00:1450:4008:c01::1b alt4.gmail-smtp-in.l.google.com. 207 IN A 173.194.79.27 alt4.gmail-smtp-in.l.google.com. 249 IN AAAA 2607:f8b0:400e:c01::1a ns2.google.com. 281970 IN A 216.239.34.10 ns3.google.com. 281970 IN A 216.239.36.10 ns4.google.com. 281970 IN A 216.239.38.10 ns1.google.com. 281970 IN A 216.239.32.10

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• Feeding the kernels entropy source from other machines and/or increasing its maximum size

  - by David Spillett

  We have has a little trouble with a small box that acts as a VPN end-point and mail relay for our network, caused by the available entropy for /dev/random being too low (which causes TLS connection attempts by exim to fail). The machine doesn't do anything else, so the normal feed into the entropy pool (interrupt timings from things like disk access) is not enough. As a quick hack I've set a looping script that reads from /dev/hda at a couple of Mbyte/sec which keeps it topped up. Other than buying a hardware RNG, is there a clean way of piping data for entry from elsewhere, such as a copy of the data our file server uses for its entropy source? I've spotted several tips for using rng-tools to feed it from /dev/urandom on the same machine but that "feels dirty". Also, is it possible to increase the maximum pool size? It currently seems to max out at 3585.

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• MySQL will Stop working after being Started

  - by user115343

  i am new to a webserver thing. I use Centmin mod to install nginx + mariaDB to setup small wordpress blog,the first day it is ok,there are nice "hello world" on my box's IP,but today i have checked that mysql is stop working so i immediately start it again but it is stoped again after some minutes! i use this tutorial but still,it will stop after some period here is my log [root@rylai ~]# tail -f /var/log/mysqld.log 120326 16:19:05 [Note] Plugin 'PBXT_STATISTICS' is disabled. 120326 16:19:05 [Note] Plugin 'InnoDB' is disabled. 120326 16:19:06 [Note] Event Scheduler: Loaded 0 events 120326 16:19:06 [Note] /usr/sbin/mysqld: ready for connections. Version: '5.2.10-MariaDB-mariadb107' socket: '/var/lib/mysql/mysql.sock' port: 3306 (MariaDB - http://mariadb.com/) 120326 16:20:36 mysqld_safe Number of processes running now: 0 120326 16:20:36 mysqld_safe mysqld restarted 120326 16:20:39 [Note] Plugin 'ARCHIVE' is disabled. 120326 16:20:39 [Note] Plugin 'FEDERATED' is disabled. 120326 16:20:40 mysqld_safe mysqld from pid file /var/lib/mysql/rylai.pid ended I only access mysql on CLI,didnt install any panel yet

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• How do I get around restrictive email policies by ISP?

  - by Peter Turner

  Apparently we've been restricted (though packet filtering) to some arbitrarily small and untenable number of emails a day by some bankrupt ISP (and they say that's how it's always been chortle). We've been using our own mail server for the last 15 years, and only recently they've been giving us guff. Is there a way for a legitimate business to email their clients, who really want to receive these emails, by bypassing the ISP? The way we've been doing it is by breaking up into 20 or 30 emails, but that gets complicated and requires a lot of manual labor by the receptionist, and unless she's really careful we wind up emailing lots of people twice. So what are my options (Hosted Email, Lithuanian Proxy Server, Different ISP, not writing awful PHP that sends out zillions of emails and gets us blacklisted)?

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• Maximum memory allocation for 32bit linux kernel

  - by LedZeppelin

  I was reading this article that talks about how maximum amount of ram dedicated for kernel usage in 32 bit windows is 2GB even when the total amount of ram is 4GB. http://www.brianmadden.com/blogs/brianmadden/archive/2004/02/19/the-4gb-windows-memory-limit-what-does-it-really-mean.aspx\ Is this the same for 32bit linux environments like 32-bit ubuntu 10.04? IE is the max kernel allocation 2GB ram even if the total main memory 4GB? If you increase the total amount of memory to 64GB of ram by recompiling the kernel with the PAE option enabled, what is the maximum amount of ram you can dedicate for kernel usage? Is it still 2GB? Or can you increase it?

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• How do I create a rule in Outlook 2010 that moves emails without special headers to a folder?

  - by burnersk

  I like to create a rule in Outlook 2010 that moves emails not containing a special string within the email header field message-id to a folder. How to do that? Pattern: not contains "SPECIAL-STRING". Example E-Mail: ... Date: Fri, 1 Sep 2012 11:16:32 +0100 Message-ID: <bla.bla.bla@SPECIAL-NOT-STRING> MIME-Version: 1.0 ... Hi there :) Pattern matches because "SPECIAL-STRING" is not present (note there is a "NOT" between the words). Automatically moves those emails to folder INBOX/other-mails.

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• sudo access for desktop actions in Gnome/KDE?

  - by Jakobud

  I feel kinda silly asking this question. I'm using CentOS 5.4 and KDE. I downloaded an archive and I want to drag/drop the contents into a folder that I need root access to write to. I can obviously go into terminal and sudo blah blah. But how do I get sudo access for desktop procedures? Like for simple dragging and dropping of files? KDE just tells me that I don't have permission to do that, but doesn't give me the option of entering the root password or sudo.

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• Authentication issues setting up iRedMail on Debian

  - by Sergio Rinaudo

  I'm setting up an exchange server using iRedMail. Following the official iRedMail installation guide (http://www.iredmail.org/install_iredmail_on_debian.html) and the Digital Ocean guide (https://www.digitalocean.com/community/articles/how-to-install-iredmail-on-ubuntu-12-04-x64) I was able to install iRedMail without any problems, so I have all the services up and running. I can configure domains and emails using iRedAdmin BUT I have problem both sending and receiving email, what I get from Roundcube is 'Authentication error' when trying to send an email. Also I can't receive anything. I also tried to connect to the mx server using telnet, it connects, but after the STARTTLS command, when I start to write "MAIL FROM:" the connection is lost. Something in the configuration is not working (at the moment I have the configuration written by the iRedMail installation) but I do not know where, I hope someone can enlight me! Thank you

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• Is there a lightweight MTA for Ubuntu 9.10 Desktop?

  - by Joe Casadonte

  I'm writing a Perl script to run as a cron job, and I want to email results & errors to a local account on the laptop. I'd like something that can talk SMTP (do any MTAs not adhere to SMTP?). I use Thunderbird 3, so I'll also need a POP/IMAP server (unless T-Bird can read straight from an mbox file; I'll have to check into that). No need for spam controls as I'll lock it down real tight, only accepting mail originating from the laptop itself. Thanks!

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• Why does m4 error "linux-gnu.m4 - No such file or directory" appear the first time after updating sendmail.mc?

  - by Mike B

  SendMail 8.14.x | CentOS 5.x I've noticed that if I manually update /etc/mail/sendmail.mc (for example, enable TLS support), and then bounce sendmail, I get the following error: Shutting down sm-client: [ OK ] Shutting down sendmail: [ OK ] Starting sendmail: sendmail.mc:18: m4: cannot open `/usr/share/sendmail-cf/ostype/linux-gnu.mf': No such file or directory [ OK ] Starting sm-client: [ OK ] This only happens one time after I update a sendmail.mc file. If I bounce sendmail again (without making any other change), I don't see the error any more. Any idea why this happens? It doesn't cause any errors - I'm just curious.

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• Debian, CentOS, Slackware, FreeBSD, OpenSolaris and Ubuntu Server Edition: Which one to use for an http web server?

  - by Ako

  I am going to install and administrate a virtual server for a small university. The server should run inside a virtual machine (VirtualBox OSE). It is only used in the university network and is invisible to the outside world. It should run Apache web server for PHP, MySQL and probably a mail server. I don't know which OS to use. Main criteria for choosing include ease of administration and updating, package management and performance. I wonder if anyone has any suggestions? And candidate OSs are: Debian, Ubuntu, CentOS, Slackware, FreeBSD, OpenSolaris. Add any other OS if you know any better alternatives.

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• CentOS - Yum doesn't update anymore?

  - by Xanathos

  I've been trying to use yum now, but for some reason, not even the search work anymore. I even tried putting packages I already downloaded in the search criteria and is the same. [root@AMDFX03 Downloads]# yum search glibc Loaded plugins: fastestmirror, refresh-packagekit, security Loading mirror speeds from cached hostfile epel/metalink | 22 kB 00:00 * base: centos.secrel.com.br * epel: archive.linux.duke.edu * extras: centos.secrel.com.br * rpmforge: apt.sw.be * updates: centos.secrel.com.br adobe-linux-x86_64/primary | 1.2 kB 00:00 http://linuxdownload.adobe.com/linux/x86_64/repodata/primary.xml.gz: [Errno -1] Metadata file does not match checksum Trying other mirror. Error: failure: repodata/primary.xml.gz from adobe-linux-x86_64: [Errno 256] No more mirrors to try. This error always appear no matter what I do. Please, can you tell me how to fix this, or at least how to reset yum's configuration?

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• How do I update my servers' domain name for Reverse DNS?

  - by Jeff

  I'm updating my mail servers' rDNS and I think I have it all figured out except for one thing. When I installed my OS (Debian Etch), the installer asked me to enter the "domain name". Is the "domain name" updated by using the hostname command? If so, which config file(s) are updated when using the hostname command? If not, how do I change my servers' domain name? My current /etc/hosts: 127.0.0.1 localhost 67.228.178.164 mrspock.example-old.com mrspock My current /etc/hostname: mrspock $ hostname -f mrspock.example-old.com I need to update hostname -f to be mrspock.example-new.com.

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• Thunderbird is unable to find server in DHCP controlled network.

  - by Skizz

  I have a network which consists of linux server and a combination of WinXP, Win7 and linux clients. All the systems are given dynamic IP addresses by the router which connects them all together. The server hosts an IMAP mail server. On Win7 and WinXP Thunderbird can access the IMAP server without any problems. On the linux client, using the same IMAP parameters, Thunderbird is unable to connect to the server. How do I get Thunderbird to find the server? I'm not sure if this is a linux system configuration problem or a Thunderbird issue. Additional note: The linux client is running Gnome, the server has a series of Samba shares defined. In the client, doing Places-Connect to Server and selecting Windows Share and specifying the server name, the Samba share is mounted OK.

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• iOS calendar sync with Exchange 365

  - by Patrick J Collins

  I signed up for an Exchange 365 account with Microsoft Online. I followed the instructions to set up my iPhone to access my mail. However, I can't access the calendar function. When I go into the account settings screen on my iPhone, the options to turn on the calendar, contacts and reminders are missing! (See step 9 on this site to get an idea of what the dialog should look like). Anyone have an idea why those options are missing and how I could activate them? Thanks, Patrick

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• Thunderbird replacement with PGP support

  - by Robert

  Is there any good Thunderbird replacement with full PGP support ? To be more exact replacement for (Thb +Enigmail this is the tandem Im using now) Best way would be if PGP would be built in into application. Commercial software is also fine :) excluding M$ software. What I need: - PGP support - application much more stable than Thunderbird, - support for Gmail out of the box including support for labels, - better search functionality (search in THB is far away from perfection), - cross platform (I should be able to run it on windows and Linux). So do you guys have an experience with other mail clients which have PGP support ?

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• install filezilla error, Depends: libatk1.0-0 (>= 1.29.3) but 1.28.0-0ubuntu1 is to be installed

  - by solomongaby

  Hello, I am trying to install filezilla from this repo: https://launchpad.net/~yofel/+archive/ppa and after sudo apt-get update i tried to install it but i get the error: Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: filezilla: Depends: libatk1.0-0 (>= 1.29.3) but 1.28.0-0ubuntu1 is to be installed Do you have any ideea what is happening ?

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• Installing Java 1.5 on Ubuntu?

  - by StackedCrooked

  I already have Java 1.6, but I need to test something with 1.5. I have downloaded the .bin file from http://java.sun.com/javase/downloads/index_jdk5.jsp using the Sun Download Manager. Now I want to create a deb file from this bin file: $ fakeroot make-jpkg java_ee_sdk-5_01-linux.bin Creating temporary directory: /tmp/make-jpkg.Zpm1Y7LbZ0 Loading plugins: blackdown-j2re.sh blackdown-j2sdk.sh common.sh ibm-j2re.sh ibm-j2sdk.sh j2re.sh j2sdk-doc.sh j2sdk.sh j2se.sh sun-j2re.sh sun-j2sdk-doc.sh sun-j2sdk.sh Detected Debian build architecture: i386 Detected Debian GNU type: i486-linux-gnu No matching plugin was found. Removing temporary directory: done How can I fix the "No matching plugin was found." error? Update I downloaded jdk-1_5_0_22-linux-amd64.bin from the archive page and ran Linux installer. It works fine.

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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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• Google Apps bounces bulk emails

  - by znq

  I've an [email protected] email address which receives emails from clients and delivers it to various people within my company. However, since today I get the following bounce error message when sending an email to this address: Delivery to the following recipient failed permanently: [email protected] Technical details of permanent failure: Message rejected by Google Groups. Please visit http://mail.google.com/support/bin/answer.py?hl=en&answer=188131 to review our Bulk Email Senders Guidelines. The Bulk Senders Guidelines describe how to send out bulk emails. However, in my case I only receive one email and distribute it to a couple of people within my company. Same problem applies to the [email protected] email address which we use internally. Does anyone know how to resolve this issue? UPDATE: I just realized that emails coming from the outside and being sent to this address still work. It just seems to be emails coming from my domain. I found a solution and posted it below.

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• trigger script on postfix delivery errors

  - by edovino

  I'm trying to get postfix to run a script on soft (4xx) and hard (5xx) delivery errors, but I'm not sure where to start. If I understand things correctly, I could insert (pipe-based) filters in the master.cf file, there's a whole 'milter' infrastructure available, an finally I suppose I could simply grep through the mail.info logs. So - any advice? Should I go the 'handle it via master.cf' route, and if so, what daemon should I intercept? 'bounce'? The grep-the-logs route is probably simplest, but I can't help but feel that there is a better way. Any advice appreciated!

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• Can Exchange be configured to populate a text/plain part of a meeting invite?

  - by larsks

  I work in an environment where some people are using Microsoft Exchange and some people are not. The meeting invitations sent out by Exchange include a text/calendar attachment with the meeting information in iCal format. They also include an empty text/plain and an empty text/html part. Is there any way to configure Exchange such that it will populate either (or both!) the text/plain or the text/html part with a human-readable version of the meeting summary? This would help out people using mail clients that do not have native support for text/calendar attachments.

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• Remote Install Mac OS X from Windows not on LAN?

  - by Frost Shadow

  I want to install applications from my Mac OS X install disc, or be able to archive-install from it, but it's back at my house outside my current LAN. Is there a way I can remotely access my OS X install disc on my home Windows XP computer from my Snow Leopard? In my help manual it says I can do remote installs, or use another computer's disc drive remotely, but it has to be with another computer on the LAN. Is there a way to combine my mac's LAN and my windows' LAN? I think it has something to do with making a VPN; is there a way to do that which will work between Snow Leopard and XP, doesn't require additional hardware, and is preferably free? Thanks a lot!

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• added shell script to sudoers still getting permission denied

  - by Bill S

  I don't understand this? Other uses of sudo work fine. [oracle@o plugins]$ su Password: [root@ plugins]# su nrpe bash-3.2$ /home/oracle/obiee/instances/instance1/bifoundation/OracleBIApplication/coreapplication/setup/bi-init.sh bash: /home/oracle/obiee/instances/instance1/bifoundation/OracleBIApplication/coreapplication/setup/bi-init.sh: Permission denied bash-3.2$ sudo -l Matching Defaults entries for nrpe on this host: env_reset, env_keep="COLORS DISPLAY HOSTNAME HISTSIZE INPUTRC KDEDIR LS_COLORS MAIL PS1 PS2 QTDIR USERNAME LANG LC_ADDRESS LC_CTYPE LC_COLLATE LC_IDENTIFICATION LC_MEASUREMENT LC_MESSAGES LC_MONETARY LC_NAME LC_NUMERIC LC_PAPER LC_TELEPHONE LC_TIME LC_ALL LANGUAGE LINGUAS _XKB_CHARSET XAUTHORITY" Runas and Command-specific defaults for nrpe: User nrpe may run the following commands on this host: (ALL) NOPASSWD: /home/oracle/obiee/instances/instance1/bifoundation/OracleBIApplication/coreapplication/setup/bi-init.sh bash-3.2$

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• create a bootable usb to automatic repair windows xp system32 files

  - by Edo Post

  Is it possible to create a script/live distro that replaces some system32 files? To explain it a bit more in details: There is a company that has multiple computers (think in 100/1000's) and they all are missing the same system32 files since the company's software removed it. The systems are distributed all over the world and are managed by "normal" people who don't have any knowledge about computers. I want to create a usb stick that i can mail to all those people which contains a script that executes when you boot the usb. this script should replace the missing system32 files without any user input is this possible, and if so how could i manage this?

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