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• How to make a huge ram drive?

  - by Brandon Moore

  At my old job when a report was needed I could sit down with someone and pull up results and get immediate feedback, and then refine my queries and ultimately have the data we needed, in the format we needed within 30-90 minutes. I just started working for a new company with a database containing millions of records and I spent my whole 8 hours making a report that I feel I could have made in less than 2 hours if it were not for the massive amount of data the queries are working with, and the fact that I couldn't ask the person needing the data to sit down with me and give me feedback as I pulled up results as I am used to. So I am trying to think of how we can make the server faster... much faster, so that I can have the same level of productivity I'm used to. One thought that just came to mind is that memory is so cheap these days, and by my calculations I could buy 10 8gig ram sticks for 1000 bucks. What I have never heard of though is a device that would let me combine these into a huge ram drive. So I'd like to know if any such device exists, and if not what is the largest ram drive I could realistically make and how would I go about doing so? EDIT: To you guys who are saying the database shema needs to be analyzed... you can't make a query such as "Select f1, f2, f3, etc from SomeTable" run any faster by normalizing or indexing the table. What I'm talking about IS ABSOLUTELY a need for improved performance at the hardware level. I am used to having results come back to me in a few seconds, not a few minutes or much less a half an hour. Maybe that's what you guys are used to who have 100 billion record tables and you feel like that's fast, but I'm looking for results back from tables with about 10 million records to come back to me withing less than half a minute TOPS.

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• CentOS security for lazy admins

  - by Robby75

  I'm running CentOS 5.5 (basic LAMP with Parallels Power Panel and Plesk) and have thus far neglected security (because it's not my full-time job, there is always something more important on my todo-list). My server does not contain any secret data and also no lives depend on it - Basically what I want is to make sure it does not become part of a botnet, that is "good enough" security in my case. Anyway, I don't want to become a full-time paranoid admin (like constantly watching and patching everything because of some obscure problem), I also don't care about most security problems like DOS attacks or problems that only exist when using some arcane settings. I'm in search of a "happy medium", for example a list of known important problems in the default installation of CentOS 5.5 and/or a list of security problems that have actually been exploited - not the typical endless list of buffer overflows that "maybe" a problem in some special case. The problem that I have with the usually recommended approaches (joining mailing lists, etc.) is that the really important problems (something where an exploit exists, that is exploitable in a common setup and where the attacker can do something really useful - i.e. not a DOS) are completely and utterly swamped by millions of tiny security alerts that surely are important for high-security servers, but not for me. Thanks for all suggestions!

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• Need help diagnosing my machine

  - by Tom Collins

  I have something that just slows my computer to a crawl sometimes. Not running anything big. Yesterday all I had running (besides background apps) were Firefox & Windows Explorer and could barely even switch screens. Nothing showing up in the task manager as hogging CPUs. I have all non-essential services stopped (MySQl & MSSQL) unless I need them. I made some restore points not long ago, but they disappeared. This is a development mach with a LOT of apps installed, so I really, really do not want to re-install Windows. So, what I'm looking for are ideas or tools I can use to help diagnose this problem. The only clues I have is this started right after I installed Office 2013 (with Office 2010 still installed as well) installed Visual Studio 2012 (also keeping 2010 as a co-install) and installed MSSQL 2012 (upgrade from 2008, no co-install) Also, computer runs fine in Safe Mode. I've just ran out of ideas of what to check. Any help / suggestions would much appreciated. Thanks P.S. I'm running Win 7 Pro (x64). Office is also 64 bit. Visual Studio & MSSQL are 64 bit if that option was available (not sure).

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• Find and Replace several several different values all at once

  - by matt

  I have a file with multiple instances of Text_1 and Text1 and I need to replace both those strings with Text_A and TextB respectively. Currently I'm doing two Find and Replace functions on each file one that finds Text_1 and replaces it with Text_A and the other that finds Text1 and replaces it with TextB. Is there any way to do this all at once instead of having to run "Find and Replace" twice? I am using Dreamweaver CS3, but I also have Notepad++, regular Notepad, OO Writer, MS Word if those will be easier. Ideally I could do this in Dreamweaver or Notepad++ but I'm open to downloading something else to get the job done. I'd prefer not to have to do any command line stuff or create a batch file (while I'm aware of it, I don't understand it really). Edit: In case the above description isn't clear, let me explain it this way... I want to run Find & Replace 1 time in 1 document and I want it to do ALL of the following during that one Find & Replace instance: Find: Text_1 and Replace with: Text_A Find: Text1 and Replace with: TextB I am not trying to do a Find and Replace across several documents.

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• Windows 7 network performance tuning for LAN

  - by Hubert Kario

  I want to tune Windows 7 TCP stack for speed in a LAN environment. Bit of background info: I've got a Citrix XenServer set up with Windows 2008R2, Windows 7 and Debian Lenny with Citrix kernel, Windows machines have Tools installed the iperf server process is running on different host, also Debian Lenny. The servers are otherwise idle, tests were repeated few times to confirm results. While testing with iperf 2008R2 can achieve around 600-700Mbps with no tuning what so ever but I can't find any guide or set of parameters that will make Windows 7 achieve anything over 150Mbps with no change in TCP window size using -w parameter to iperf. I tried using netsh autotuining to disabled, experimental, normal and highlyrestricted - no change. Changing congestionprovider doesn't do anything, just as rss and chimney. Setting all the available settings to same values as on Windows 2008R2 host doesn't help. To summarize: Windows 2008R2 default settings: 600-700Mbps Debian, default settings: 600Mbps Windows 7 default settings: 120Mbps Windows 7 default, iperf -w 65536: 400-500Mbps While the missing 400Mbps in performance I blame on crappy Realtek NIC in the XenServer host (I can do ~980Mbps from my laptop to the iperf server) it doesn't explain why Windows 7 can't achieve good performance without manually tuning window size at the application level. So, how to tune Windows 7?

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• Installing OEM Windows Server 2008 under KVM

  - by rancidfishbreath

  Issue I have an HP server that came with an OEM copy of Windows Server 2008. I have installed CentOS 5.4 on the hardware and am trying to install Windows Server 2008 as a KVM guest. When I attempt to install Windows Server 2008 it complains that I am trying to install on unsupported hardware. This issue is caused because the hardware SMBIOS information is not being passed to the KVM guest. Background Before I go any further I want to state that what I am trying to do is within the license. HP offers a supported solution for VMWare but does not have an official solution for KVM. After much research the platform I am going to use is CentOS and KVM so please do not suggest other platforms. I emailed the KVM developers mailing list and was told that this is possible and was given the advice that: "You can dump SLIC table of your host bios and provide it to guest bios using -acpitable parameter." I used dmidecode and got the parameters that need to be passed, but I do not know where to pass the parameters into. Update Looks like CentOS 5.4 uses virt-install instead of qemu. Qemu is in the package manager and I was able to install it after uninstalling qemu-img (they conflict and qemu contains the packages in qemu-img). So now I know how to pass the acpitable parameters, but I am having trouble mapping what came out of dmidecode into -acpitable.

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• Search inside of text files

  - by Matt

  So here is the situation. I currently run a mail server for my small non-profit company. My mail server (Merak Mail Server) keeps logs in .log files and mail as .tmp files. Essentially these are just text files that are kept on the server. Problem is that when I put text into the "Containing text" field on Windows Explorer, it always misses the files and tells me no results returned. Then when I search the files one by one (painful at best), I find the files I need. Do I not understand the search feature well enough, or maybe I have it indexing wrong. I really don't care what I need to use to search the files, even a third-party app is fine with me, I just want to type an email address into a box and search all of my log files or email files and find out which one I am looking for. It can be Windows Search or something else, as long as I can find a way to get the job done I will be happy. Pay solutions are fine as well. Thanks everyone in advance.

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• How to check that all ZFS snapshots within a pool are without holds before destroying that pool

  - by Graham Perrin

  Question Already I can check each snapshot of a filesystem individually, manually. I would prefer to check all at once (all with a single command or script). Please: can that be done with a script? Background From the man page for zfs(8): zfs holds [-H] [-r] snapshot… … -r Specifies that a hold with the given tag is applied recursively to the snapshots of all descendent file systems. I wondered whether recent snapshots are treated as descendants of older snapshot. No: Last login: Sat Dec 8 09:02:26 on ttys003 macbookpro08-centrim:~ gjp22$ zfs holds -r gjp22@2012-12-08-081957 NAME TAG TIMESTAMP macbookpro08-centrim:~ gjp22$ zfs holds -r gjp22@2012-10-28-212255 NAME TAG TIMESTAMP gjp22@2012-10-28-212255 problem with LocalStorage for WOT for Safari Mon Oct 29 6:44 2012 macbookpro08-centrim:~ gjp22$ zfs hold experiment gjp22@2012-12-08-081957 macbookpro08-centrim:~ gjp22$ zfs holds -r gjp22@2012-10-28-212255 NAME TAG TIMESTAMP gjp22@2012-10-28-212255 problem with LocalStorage for WOT for Safari Mon Oct 29 6:44 2012 macbookpro08-centrim:~ gjp22$ zfs holds -r gjp22@2012-12-08-081957 NAME TAG TIMESTAMP gjp22@2012-12-08-081957 experiment Sat Dec 8 9:04 2012 macbookpro08-centrim:~ gjp22$ zfs holds -r gjp22@2012-10-28-212255 NAME TAG TIMESTAMP gjp22@2012-10-28-212255 problem with LocalStorage for WOT for Safari Mon Oct 29 6:44 2012 macbookpro08-centrim:~ gjp22$

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• How to monitor changes in the frequency of network latency spikes over time?

  - by dequis

  I'm currently trying to troubleshoot an issue with my network in which I get latency spikes up to 200 seconds (normally around 50 secs) in an apparently random way at apparently random moments of the day. While trying to find what part of my messy network needs to be blamed (outside of the scope of this question - discussed a bit on chat), I realized I have no reliable way to confirm that a change actually improved anything. So far, the main way in which i notice this is that irssi shows [Lag: 15 (??)] in the statusbar, increasing every 5 seconds, and all other connections seem to be affected too. Since this depends on my observations, it's not a very reliable method to know how often it really happens. Note that just sending ICMP pings is probably not enough, but that's just my guess. It might be a "bufferbloat" issue, it might be packet loss, it might only apply to persistent connections. I suspect this because a few months ago, when the issue started, I had a "ping" command running in background and it didn't show anything weird at all during the latency spikes. This seems to have changed now (pings don't go through), but still, I'd prefer something more robust.

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• How to let MSN or Yahoo Messenger set you to be Invisible or Offline when you are idle for an hour?

  - by Jian Lin

  The short question is: How do we let MSN or Yahoo Messenger set us to be Invisible or Offline when we are idle for half an hour or an hour? The reason is: if I am on 24 hours a day, some people see me as weird. Some people see my value as low, because I am always there. There are ways to set me to "Away" or "Busy" after 10 minutes, but there seems to be no way to set myself to invisible or offline after 1 hour. As I am a software developer, I am very used to turning the computer on 24 hours a day. (for example, for checking email for urgent fixes, and fix issue and push to web server). We don't turn off computer usually even when we sleep, because we may sometimes can't sleep yet and come check on the computer, or wake up in the morning and immediately need to check if everything is ok. But, my MSN and Yahoo Messenger is always on for 24 hours a day, and I found that some girls start to ask me why I am always there 24 hours a day (even though they see me as away or busy, their feeling is that I am always there). What's more, I found that since I am always there, my value actually drop in their eyes, because hard to get = high value, and always there = low value. Some people feel me as having nothing much to do, always in front of computer, or what is he doing in front of computer so much? Now since it is my job, and I need to read emails once in a while, I am in fact in front of the computer more than some other people. I am in front of the computer maybe 10 hours a day, far from 24 hours a day. Is there an easy and automatic solution to this?

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• Connection timeout when trying to SSH

  - by dan

  The other day I tried to connect to my remote server via SSH as i always have. But now when I try to connect it just times out after about 60 seconds. I run service ssh start Which tells me that Job is already running: ssh. I then ran $netstat -tnlp Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:993 0.0.0.0:* LISTEN 1972/dovecot tcp 0 0 0.0.0.0:995 0.0.0.0:* LISTEN 1972/dovecot tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN 2030/mysqld tcp 0 0 0.0.0.0:110 0.0.0.0:* LISTEN 1972/dovecot tcp 0 0 0.0.0.0:143 0.0.0.0:* LISTEN 1972/dovecot tcp 0 0 0.0.0.0:10000 0.0.0.0:* LISTEN 2157/perl tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 3028/sshd tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 2273/master tcp6 0 0 :::80 :::* LISTEN 2618/apache2 tcp6 0 0 :::21 :::* LISTEN 2291/proftpd: (acce tcp6 0 0 :::22 :::* LISTEN 3028/sshd I am able to access subdomains on my site, and FTP, but don't have the ability to SSH or even ping remotely. Any thoughts?

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• How Do I Secure WordPress Blogs Against Elemento_pcx Exploit?

  - by Volomike

  I have a client who has several WordPress 2.9.2 blogs that he hosts. They are getting a deface kind of hack with the Elemento_pcx exploit somehow. It drops these files in the root folder of the blog: -rw-r--r-- 1 userx userx 1459 Apr 16 04:25 default.htm -rw-r--r-- 1 userx userx 1459 Apr 16 04:25 default.php -rw-r--r-- 1 userx userx 1459 Apr 16 04:25 index.asp -rw-r--r-- 1 userx userx 1459 Apr 16 04:25 index.aspx -rw-r--r-- 1 userx userx 1459 Apr 16 04:25 index.htm -rw-r--r-- 1 userx userx 1459 Apr 16 04:25 index.html -rwxr-xr-x 1 userx userx 1459 Apr 16 04:25 index.php* It overwrites index.php. A keyword inside each file is "Elemento_pcx". It shows a white fist with a black background and the phrase "HACKED" in bold letters above it. We cannot determine how it gets in to do what it does. The wp-admin password isn't hard, but it's also not very easy either. I'll change it up a little to show you what the password sort of looks like: wviking10. Do you think it's using an engine to crack the password? If so, how come our server logs aren't flooded with wp-admin requests as it runs down a random password list? The wp-content folder has no changes inside it, but is run as chmod 777 because wp-cache required it. Also, the wp-content/cache folder is run as chmod 777 too.

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• make local only daemon listening on different interface (using iptables port forwarding)?

  - by UniIsland

  i have a daemon program which listens on 127.0.0.1:8000. i need to access it when i connect to my box with vpn. so i want it to listen on the ppp0 interface too. i've tried the "ssh -L" method. it works, but i don't think it's the right way to do that, having an extra ssh process running in the background. i tried the "netcat" method. it exits when the connection is closed. so not a valid way for "listening". i also tried several iptables rules. none of them worked. i'm not listing here all the rules i've used. iptables -A FORWARD -j ACCEPT iptables -t nat -A PREROUTING -i ppp+ -p tcp --dport 8000 -j DNAT --to-destination 127.0.0.1:8000 the above ruleset doesn't work. i have net.ipv4.ip_forward set to 1. anyone knows how to redirect traffic from ppp interface to lo? say, listen on "192.168.45.1:8000 (ppp0)" as well as "127.0.0.1:8000 (lo)" there's no need to alter the port. thanx

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• On Windows and Windows 7's Task Manager, why Memory is 1118MB Available but only 62MB Free? [closed]

  - by Jian Lin

  Possible Duplicate: Windows 7 memory usage What are the "Cached", "Available", and "Free" memory in the following picture (From Windows 7's Task Manager). If it is 1118MB Available, then why isn't it Free (to use)? As I understand it, if a bowl of noodle is available, that doesn't mean it is free... it may still cost $7. But what about in the Task Manager, when it is Available, it is also not Free? Does it cost $2 per MB? What about the "Cached"... What exactly is the Cached Memory? We may put some hard disk data in RAM and so we cache the data in RAM, for faster access (that's the operating system's job). So the Total Physical RAM is 6GB, what is the 1106 Cached? Cached in where? Caching physical RAM in ... some where? It is also strange that the Cached value is sometimes higher and sometimes lower than the Available value. Can somebody who is knowledgeable about this shred some light on these meanings?

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• Websites down EC2 inaccessible via SSH CPU utilisation 100% last few hours - what should I do?

  - by fuzzybee

  I have multiple websites hosted on 1 single EC2 instance. 1 website "abc" were down for a few hours, sometimes threw database connection error and sometimes just took too long to respond. 1 website "def" were incredibly slow but still up and running the rest of the websites had the same symptoms has "abc" I can afford 15 min or less down time for "def". Should I then (in AWS console) reboot my instance or create an AMI image from my instance and launch it and associate my elastic IP to the new instance or "launch more like this" Background on what may have happened to my ec2 The last time I made changes for 21 hours ago. A cronjob to create snapshots ran around 19 hours ago and it has been running for a long time. Google Analytics shows traffic to my websites such as kidlander.sg has been nothing exceptional. Is there any other actions I should take or better options I could have? (I have already contacted AWS support but their turnaround is 12 hours so I appreciate all the help I could get) Update I got everything back up and running and CPU utilisation back to normal, around 30%. There is 1 difference between "def" and "abc" as well as my other websites "def"'s database is hosted on RDS "abc"'s database is hosted on an EC2 instance (different from my web server instance) configured by myself Nevertheless, I checked the EC2 instance I'm using as MySQL server yesterday and it was absolutely fine during the incident low CPU ultilisation I could log in using linux command line

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• Windows 7 just deleted 4 days of work wtf!?

  - by Mat

  Hey! I'm just a bit about to freak out. I just finished a project and rebooted my computer. It didn't want to boot anymore so I had to use the windows 7 system repair option. it run for a minute and then booted up. Now most of my sourcecode from the last 4 days of work is gone! background: sometimes (most often after installing new software) my notebook won't boot up anymore. It will just show the little Win 7 flag, but not read from the harddisk anymore. If I hardabord and reboot then, it asks me whether to start windows normally (which won't work) or to run "windows startup repair". If i run it, it does some stuff for about two or three minutes and then I can boot windows again. Usually after this, .exe files i added to the computer during previous days are gone - but other files so far were not touched. But now, after this happened, a whole bunch of ".as" (ActionScript source files) from my project are gone!! does anyone know where and whether there's a way to recover them?? please help! Thank you!

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• Identifying Httpd error log in Fedora 16

  - by Cerin

  How do you find the cause of httpd errors in Fedora 16? The new systemctl command in Fedora 16 seems to horribly obscure any useful logging info. [root@host ~]# systemctl start httpd.service Job failed. See system logs and 'systemctl status' for details. [root@host ~]# systemctl status httpd.service httpd.service - The Apache HTTP Server (prefork MPM) Loaded: loaded (/lib/systemd/system/httpd.service; enabled) Active: failed since Thu, 21 Jun 2012 16:26:56 -0400; 1min 23s ago Process: 2119 ExecStop=/usr/sbin/httpd $OPTIONS -k stop (code=exited, status=0/SUCCESS) Process: 2215 ExecStart=/usr/sbin/httpd $OPTIONS -k start (code=exited, status=1/FAILURE) Main PID: 1062 (code=exited, status=0/SUCCESS) CGroup: name=systemd:/system/httpd.service So the first command fails...and it tells me to run another command...which simply tells me that the command returned an error code. Where's the actual error? Even more frustrating is nothing seems to have been written to the logs: [root@host ~]# ls -lah /var/log/httpd/ total 8.0K drwx------. 2 root root 4.0K Jun 21 16:19 . drwxr-xr-x. 21 root root 4.0K Jun 20 16:33 .. -rw-r----- 1 root root 0 Jun 21 16:19 modsec_audit.log -rw-r----- 1 root root 0 Jun 21 16:19 modsec_debug.log

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• Backup with Mercurial and Robocopy?

  - by Andrew Neely

  The Problem We would like to backup our critical files from several network shares to a removable hard drive. We want to automate the backup so we don't have to remember to run it. It needs to finish overnight. Furthermore, we want to be able to preserve multiple versions of each file so we can back out of our user's mistakes easier. Background Information I work in a large Windows-based enterprise with a centralized IT section who is responsible for all backups. Their backups are geared towards disaster recovery and not user error, and require upper-level management approval for any non-disaster recoveries. Several times we have noticed that our backups have failed, we weren't notified. I do not have administrative rights to the server or my desktop. We are trying to backup some 198,000 files spanning about 240 gigabytes. These files rarely change. Our backup drive is one terabyte. My Proposed Solution What I would like to do is to write a batch file using Robocopy with the /mir option along with Mercurial SCM to store all versions of the file. I would do an hg add followed by an hg commit before each execution of Robocopy to save the current state, and then make a mirrored copy of the file structures. The problem is the /mir will delete every folder not present in the source, and Mercurial stores the repository in a .hg folder in the destination folder. Does anybody know how I could either convince Mercurial to store the .hg folder elsewhere, or convince Robocopy not to delete it from the destination? I'm trying to avoid writing a custom program do to copying.

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• Get IP or MAC addresses of Windows Multipoint Server 2012 stations?

  - by user1454265

  Is it possible to programmatically retrieve the IP or MAC address of a station assigned to a Windows MultiPoint Server 2012 host, using PowerShell or any other .NET or Windows API? Background: I'm developing a application to help set up USB-over-Ethernet zero clients in a WMS 2012 setup, bridging the PowerShell "WmsCmdlets" module (Microsoft.WindowsServerSolutions.MultipointServer.PowerShell.Commands.Library.WmsStation) and a third-party vendor API for configuring zero client IP address, etc. So far, I do not know any means of matching up the "stations" of the WmsCmdlets with the zero client objects in the vendor's API. Finding out the IP or MAC associated with a WMS station would do nicely, since I have this on the zero client API side. However, I haven't found any information I could use in the PowerShell WmsCmdlets module, such as Get-WmsStation which returns the following: Id : 1 Name : <my station name> IsAutoLogOn : False IsSplit : False CollabId : 0 RemoteConnectionServerName : VirtualMachineName : VirtualMachineId : AutoLogOnUserName : AutoLogOnPassword : DeviceTypes : {DT_Mouse, DT_Keyboard, DT_Audio, DT_MassStorage...} DeviceCounts : {2, 2, 0, 0...} ComputerName : <my WMS host server name> SessionId : 4294967295 SessionHostServer : <my WMS host server name>

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• Conky starts above windows in Ubuntu Maverick

  - by DesertIvy

  Hey guys, I did not run into this problem until I upgraded my Ubuntu box to Maverick Meerkat (10.10). Basically, whenever I start my computer, conky runs as expected, except it gets drawn over any windows that I load (see screenshot). To fix this for a single session, I simply restart conky by running killall conky; conky in a terminal. Conky gets re-drawn below active windows (namely, only appearing on my desktop), and does not have the border/drop-shadow, but I have to do this every time I start a new session. Is there a simple way to fix this? I have a small shell script that I run on startup, but it does not seem to solve the problem. #!/bin/bash sleep 10 && conky; sleep 5 && killall conky; conky; Below is the non-text part of my .conkyrc file. # Conky settings # background yes update_interval 1 cpu_avg_samples 2 net_avg_samples 2 override_utf8_locale yes double_buffer yes no_buffers yes text_buffer_size 2048 #imlib_cache_size 0 temperature_unit fahrenheit # Window specifications # own_window yes own_window_type override own_window_transparent yes own_window_hints undecorate,sticky,skip_taskbar,skip_pager,below border_inner_margin 0 border_outer_margin 0 minimum_size 200 250 maximum_width 200 alignment tr gap_x 220 gap_y 280 # Graphics settings # draw_shades no draw_outline no draw_borders no draw_graph_borders no # Text settings # use_xft yes xftfont caviar dreams:size=8 xftalpha 0.5 uppercase no temperature_unit celsius default_color FFFFFF # Lua Load # lua_load ~/.lua/scripts/clock_rings.lua lua_draw_hook_pre clock_rings

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• Utility to store/cache all web pages and YouTube videos

  - by jonathanconway

  I found myself in the following situation. I'm travelling abroad with my laptop. I connect to a WiFi point and do a bit of browsing and play a YouTube video or two. Then I disconnect and hop on either a plane or taxi. Now I want to go back to some of the webpages I was browsing before and continue reading them, or watch some more of that YouTube video. Unfortunately it seems like none of these resources are cached, or if they are, I have no idea how to access them. Here's what I'd like: A utility that starts when my computer boots and sits in the background, silently caching all the web pages that I view. Not only that, but also the resources such as YouTube videos. Later, when I re-navigate to a site while disconnected, the browser automatically pulls the pages from my cache rather than giving me a 404 error. Or I can click an icon in the system tray and see a list of all the pages/videos in the cache and view any that I like. I'm sure Internet Explorer had a feature like this at some point, like "Offline Mode" or something. But these days it doesn't seem to work. Even when I select that option I still can't view pages that I'm certain I downloaded before. So has the utility I'm talking about been developed yet?

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• ghc6 install trouble: hGetContents: invalid argument (invalid UTF-8 byte sequence)

  - by olimay

  Having trouble installing ghc6 on Ubuntu Maverick via apt. Here's what seems to be the relevant error that comes up when I try to (apt-get|aptitude) install ghc6: A package failed to install. Trying to recover: Setting up ghc6 (6.12.1-13ubuntu1) ... ghc-pkg: /home/opm/.ghc/i386-linux-6.12.1/package.conf.d/unix-compat-0.2-edefa7bced91ebe610d455bab466e200.conf: hGetContents: invalid argument (invalid UTF-8 byte sequence) (Here's the full output, if you're interested: http://paste.ubuntu.com/566475/ ) This still happens after apt-get clean and apt-get update. My searching around has not really helped me understand what's going on, except that it might be caused by a mismatch in locale. So, here's the output of locale too: LANG=en_US.utf8 LANGUAGE=en_US:en LC_CTYPE="en_US.utf8" LC_NUMERIC="en_US.utf8" LC_TIME="en_US.utf8" LC_COLLATE="en_US.utf8" LC_MONETARY="en_US.utf8" LC_MESSAGES="en_US.utf8" LC_PAPER="en_US.utf8" LC_NAME="en_US.utf8" LC_ADDRESS="en_US.utf8" LC_TELEPHONE="en_US.utf8" LC_MEASUREMENT="en_US.utf8" LC_IDENTIFICATION="en_US.utf8" LC_ALL= Any ideas? Additional background: this all seems very strange to me, because I used to have ghc6 installed correctly--I use XMonad as my main window manager most of the time. I tried to install haskell-platform (through apt), which failed and told me that there was something wrong with ghc6, and so I reinstalled ghc6 and began to get the above error message.

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• APACHE - PHP - Bounce emails

  - by user1179459

  I want to improve our mail server lists by handling all the bounces we get in our websites. I have a website which has over 8000+ users and another website which as over 1500+ users, they are emailed various notifications every second, ie. job alerts, email alerts, I am using POP connections with EXIM on APACHE server, most scripts are based on PHP language generates email on the fly. Problems i have But some users has registered long time ago and now quite few has bounce email address Some users register with dummy emails like [email protected] which never existed but a valid email address, any chance of stopping this without asking them login to the email account and clicking links which dont work most times.. (too annoying to the end user) Server is sending unnecessary emails can be avoided if i know they dont exists ? Solutions i need to have Is there a way i can download the bounce email list somewhere (WHM/Cpanel), i know exim mail has it but its not readable (i need a file like CSV or something similar to scan them over and write a php script to delete the users from the database ?) I need to know if there is any function in the PHP that can check the existence of the email address on the fly ? so that i can set the email send function in the mailer class to check before it sends out. On the server will bouncing emails are going to eatup lots of server resources ? like memory/cpu on processing them ? or are they are minimal where we dont have to worry about this at all ? May be a opensoruce or linux software to capture them and view them in a report basis and cleaning them up ? I am not a linux expert or server admin but i do lot of PHP coding, so please be descriptive of the solutions specially if they are linux commands Thank you!

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• Is the sysadmin/netadmin the defacto project planner at your organization?

  - by gft74

  At my company it has somehow over the past few years slowly become my job to come up with a project plan, milestones and time lines for deployment of developer applications. Typical scenario: My team receives a request for a new website/db combo and date for deployment. I send back a questionnaire for the developer to fill out on all the reqs for the site (ssl? db? growth projections etc.) After I get back all the information, the head of development wants a well developed document of what servers will it live on why those servers what is the time line for creating the resources step-by-step SOP for getting the application on the server and all related resources created (dns, firewall, load balancer etc.) I maybe just whining but it feels like this is something better suited to our Project Management staff (which we have) or to the developer. I understand that I need to give them a time-line on creating the resources, but still feel like this is overkill. We already produce documentation on where everything lives and track configuration changes to equipment. How do other sysadmin folks handle this?

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• How do you handle data archiving?

  - by 20th Century Boy

  Backups are one thing, but long term archival is another. For example, you might be required to store emails for 7 years, or keep all project data indefinitely. I used to save archives to tape, but then I've had tapes get destroyed (drives rip the tape out). So...write to 2 tapes I hear you say. Is that what others do? Have 2 (or more) tapes of the same data for redundancy? But then the other issue is that tapes cannot usually be read by different backup software vendors. Eg if you go from Arcserve - Backup Exec - Commvault over 10 years you would need to keep all 3 systems so that you could restore old data. Likewise for hardware. Old tapes might not be barcoded. Might not be compatible with the new library etc etc. So do you keep old tape hardware AND old software just in case you might need to restore a 10 year-old file? Or...when you move to a new backup system do you migrate all archived data to the new system and re-archive it onto new tapes? That could be a huge job. Any thoughts?

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