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• Lightweight alternative to R for RHEL?

  - by Eric Rath

  I want to use R for some statistical analysis of logfile information, but found that even the "limited" R-core RPM has a lot of dependencies not already installed. I don't want to install so many packages for a peripheral need. Are there lightweight alternatives for simple statistical analysis on RHEL 6? I have an R script that accepts on stdin a large set of values -- one value per line -- and prints out the min, max, mean, median, 95th percentile, and standard deviation. For more context, I'm using grep and awk to find GET requests for a particular path in our webserver log files, get the response times, and calculate the metrics listed above in order to measure the impact on performance of changes to a web application. I don't need any graphing capabilities, just simple computation. Is there something I've overlooked?

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• Firefox: combine bookmarks toolbar and tabbar

  - by horsedrowner

  I am looking for a way to 'minify' the Firefox UI by combining the bookmarks toolbar with the tabbar. The easiest way I could see this done, is by simply moving the Bookmarks left of the tabs on the tabbar. I do not have the knowledge of writing my own userChrome.css styles, but it seems possible to do it this way. Another more difficult way to do this, would be by making it work similar to Windows 7's taskbar. What I mean by this, is to have a bookmark toolbar, and clicking on a bookmark would turn it into a tab, just like clicking an icon in the taskbar in Windows 7 would turn that into a 'program'. Ultimately, it comes down to this: by default, you have two toolbars: a bookmarks toolbar and a tabbar. I would like to combine these into one toolbar.

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• Effectively managing crontab

  - by jakenoble

  My crontab looks something like this; 1 * * * * /var/www/cron/site1.sh > /dev/null 2>&1 0 * * * * /var/www/cron/site2.sh > /dev/null 2>&1 3 * * * * /var/www/cron/site3.sh > /dev/null 2>&1 This works great and lets me place all the nasty little script calls into one place, rather than making crontab harder to read than it already is. But, this fails massively when site2.sh needs one script to run once a day, another to run once a week and another to run every 5 minutes. And of course it gets worse as new scripts get added with different timings. Is there a better way? EDIT By better I mean making it more manageable, having a large crontab is not manageable, but neither is having scripts all over the place. Not a GUI necessarily.

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• Analyse frequencies of date ranges in Google Drive

  - by wnstnsmth

  I have a Google Drive spreadsheet where I would like to compute occurrences of date ranges. As you can see in my sheet, there is a column date_utc+1 which contains almost random date data. https://docs.google.com/spreadsheet/ccc?key=0AhqMXeYxWMD_dGRkVGRqbkR3c05mWUdhYkJWcFo2Mmc What I would like to do is 1) put the date values into bins of 6 hours each, i.e. 12/5/2012 23:57:04 until 12/6/2012 0:03:17 would be in the first bin, 12/6/2012 11:20:53 until 12/6/2012 17:17:07 in the second bin, and so forth. Then, I would like to count the occurrence of those bins, such as bin_from bin_to freq ----------------------------------------------- 12/5/2012 23:57:04 12/6/2012 0:03:17 2 12/6/2012 11:20:53 12/6/2012 17:17:07 19 ... ... ... Hope it is clear what I mean. Partial hints are very welcome as well since I am pretty new to spreadsheeting.

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• how to publish c# project online

  - by hero

  i have done a simple c# website that have a lot of pics (3000+). i want to publish the full website online. all i know is that i have to first buy a domain name, and then buy some space on a webhosting server. could anybody guide me? how much does a domain name usually cost? and also how should i upload the website on a hosting server? i mean should i upload the full code?

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• Is a "Soft Modem" (i.e. internal) really going to cause incompatibilities?

  - by Farseeker

  Thanks to the fact that our banking industry in Australia... outdated (which is the politest word I could think of when describing the banking industry)... to do a certain kind of transaction our bank requires us to use a dialup modem and send serial data to them. When reading through their documentation (last update: 1995), they state that any "Soft Modems" (by which I assume they mean internal modems, as they refer to a AMR socket on a motherboard, which I haven't seen in donkeys years) should not be used because of "possible incompatibilities" Seeing as buying an external, serial-port modem is actually quite expensive these days and I have a whole box of PCI modems taken out of a bunch of Dells I really don't want to have to buy an external modem. Additionally I think their documentation is simply outdated. Has anyone had experience with internal modems causing issues, where an external modem didn't?

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• So confused by these CPU Specs can someone please help me out? THanks!

  - by Kevin

  Intel® Core™ i7-640M (2.8~3.46GHz, 35W) w/4MB Cache - 2 Cores, 4 Threads - 2.5 GT/s SO i'm buying a new laptop, which i have not done in 6 years. So i am not familiar with any of these cpu specs. It was the highest option for intel for this laptop. So i am assuming it is somewhat fast. But i'd like to learn what these specs mean. Any help would be greatly appreciated. i am not really a computer guy but would love to learn about what I am buying. Thanks!

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• Mysql loses its root password

  - by RubyDev

  I am having a strange problem, my mysql loses/resets the root password automatically. By which I mean that it resets it to none. It has happened twice this month. I am worried that it can be a security issue as data is open waiting only for someone trying no password! Here is the version: mysql --version mysql Ver 14.14 Distrib 5.1.56, for redhat-linux-gnu (i386) using readline 5.1 Any help would be appreciated. Update: Output of select user, host, password from mysql.user; how it looks after the password got reset | root | localhost | | root | 127.0.0.1 | | | localhost | | | admin | localhost | ################################# | (I have removed the actual output with #) So all the passwords are blank, except for for another user named 'admin'

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• OpeVPN log connecting client IPs

  - by TossUser

  I looking for the best solution to log all connecting client's ip to either a text file or a database who logs into my VPN server. Under the IP I mean the public WAN IP on the internet where they are connecting from. A hack could definitely be to make the openvpn server log to a separate logfile and run logtail periodically to extract the necessary information. So the database I want to build would look like: Client_Name | Client_IP | Connection_date roadwarr1 | 72.84.99.11 | 03/04/14 - 22:44:00 Sat Please don't recommend me to use the commercial Openvpn Access Server. That's not a real solution here. If the disconnection date could be determined that would be even better so I could see how long a client was connected and from where! Thank you

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• Any cloud storage service that lets us to authenticate the file when we serve the file to our visito

  - by TORr0t

  Lets say, i want to restrict a file to my visitors. I mean , i have an xx.avi file to be streamed/downloaded, and the visitor paid me for the bandwidth and the size of the file. In amazon s3, i cant control the file at all .(there is a very basic control thing which is not ok for me) Only way is my server can proxy the file, like it fetches the file from amazon s3 storagenode and send it to the owner with authentication approval by a php script. But this way i would double up the bandwidth usage and again there would be latency problem since my server needs to get the file from amazon s3. So i was wondering if there is a better solution or any cloud storage service that lets us to control the file restriction to my visitors. Thanks

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• Export policy configuration from eTrust ITM 8.1

  - by grub

  Currently we are using the Enterprise AV Solution eTrust ITM 8.1. The licenses are running out in october and we are going to replace eTrust with another AV solution. The eTrust Server is running on Windows Server 2003 SP2 with an MS SQL 2000 Standard Edition. The problem is that we've got many different policy - sets which we have to redefine in the new AV solution. Is there any way with eTrust ITM 8.1 to export the different policies as csv, pdf ... whatever? I really dont want to do that manually (that would mean one print screen after the other ;-) ) Thank you very much. grub

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• Is possible to arbitrarily register names to the same public IP?

  - by Alex. S.

  I registered a domain, lets say mysite.com (for example), then, results that somebody else has an A record from anotheraddress.com pointing to the same IP address of mine (in a VPS in linode.com) What can I do to avoid this???, I mean, I would prefer reject accesses from anotheraddress.com to my site. I just know only by casualty putting my genuine domain name on this http://www.domaintools.com/reverse-ip/ My DNS server is name.com, and the DNS server pointing to the my public IP is from GoDaddy. Is possible to register arbitrarily names to the same public IP? Can I use my DNS record with mysite.com to point to 209.85.133.147 (google.com), for example?

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• Is there software that can visualize all sounds from the sound card?

  - by bentsai

  I'm looking for a solution to this problem: When I'm working at my computer, sometimes I'll be using noise-isolation headphones connected to a source other than my computer (e.g., an iPod). I would like to see (this is what I mean by "visualize") some kind of notification on my screen, since I will not be able to hear the sound. Is there any software out there that would accomplish this? I'm interested in seeing any sounds that would normally come out of th sound card. This is for Windows (XP), but I'd be interested in hearing solutions for other flavors, and OS X, as well.

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• VGA passthrough and desktop virtualization

  - by Zacariaz

  In short, my dream is to have one machine with multiple paravirtualized desktop and server guests, one of which has to be a Windows desktop with powerful graphics. As Windows can't be paravirtualized in the normal sense of the word, I was quite happy when I heard about VGA passthrough, but then I read on. As I understand it, such a setup would mean that the Graphics will be dedicated to one particular guest, thus you wouldn't be able to switch between guests. If this is in fact so, would someone please explain to me what the purpose/use of VGA passthrough is? I can think of no real use for it. Yes it's a cool technology, but to me it seems pointless. It's true that it's possible to passthrough individual VMs to separate GPUs, which is also cool, but in the end I should think that two seperate computers would make life a whole lot simpler. Again it seems rather pointless.

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• How to migrate Notepad++ settings?

  - by NoCatharsis

  I am trying to portabilize every program I use if possible, and Notepad++ is on the list. The only problem is that I've had a native installation until now so that I'm not totally sure which settings files need to be moved to the portable directory. Surely there's a function tucked away somewhere in NPP exactly for this purpose, or some plugin out there? I mean the developers have literally thought of everything else, yet this is the one thing I cannot find specifically anywhere in the NPP wiki or otherwise, and I don't want to miss an important file. Here is the closest I've gotten: Notepad++'s configuration files and Where are all the files? Should I just copy every configuration file listed on the first link?

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• Logins with only HTTP - are they as insecure as I'm thinking?

  - by JoeCool1986

  Recently I was thinking about how websites like gmail and amazon use HTTPS during the login process when accessing your account. This makes sense, obviously, since you're typing in your account username and password and you would want that to be secure. However, on Facebook, among countless other websites, their logins are done with simple HTTP. Doesn't that mean that my login name and password are completely unencrypted? Which, even worse, means that all those people who login to their facebooks (or similar sites) at a wifi hotspot in public are susceptible to anyone getting their credentials using a simple packet sniffer (or something similar)? Is it really that easy? Or am I misunderstanding internet security? I'm a software engineer working on some web related stuff, and although at the current time I'm not too involved with the security aspect of our software, I knew I should probably know the answer to this question, since it's extremely fundamental to website security. Thanks!

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• Checking that tasks are executed

  - by homer5439

  I'm not sure how to explain this. Once one starts having dozens or hundres of servers, each running some sort of periodic jobs (mostly from cron), there is a problem of making sure (or as sure as possible) that these tasks are actually ran. I mean, I get an email if a job fails fails, and no mail if it succeeds, but also no mail if it doesn't run for whatever reason. Sure, I could change them and have them send a "successfully ran" email, only to be flooded by mails that most of the time I don't want to see. Basically, I want to be notified only if: a task ran and failed a task didn't run at the expected time. Is there a way to do this?

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• php5-suhosin Broken Installation

  - by h00j

  Hi i get the following error when trying to install, have you any idea how to fix? apt-get install php5-suhosin Reading package lists... Done Building dependency tree Reading state information... Done 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: php5-suhosin : Depends: phpapi-20090626 E: Unable to correct problems, you have held broken packages. I get the following error in my apache2 error log [Mon May 07 21:43:15 2012] [error] [client ip] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php5/20100525/suhosin.so' - /usr/lib/php5/20100525/suhosin.so: cannot open shared object file: No such file or directory in Unknown on line 0

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• Don't understand [0:0] iptable syntax

  - by artaxerxe

  I'm struggling with some iptables rules. I'm a newbie in iptables. I found some resources where I get the following command related to iptables. This is stored in a file that will be executed. [0:0] -A PREROUTING -s 10.1.0.0/24 -p tcp -m tcp --dport 81 -j DNAT --to-destination 10.1.0.6:3128 Can anybody explain me what does [0:0] mean? Also, some link related to this in iptables are welcome. Thanks in advance! P.S. If you need more rules, just let me know.

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• Computers with Small Capacity SSD - For caching?

  - by RXC

  Recently, in newsletters from websites, I have been seeing computers for sale from manufacturers that include an HDD and an SSD but the SSD has a small capacity like 24 GBs. I don't know if this still holds true, but I learned that when building a computer, you would want to install your OS on your fastest hard drive. I do a lot of PC gaming, so I install my OS and games on my SSD, because I learned that games and many applications make lots of system calls to the OS and performance can only be as fast as the slowest piece. Why these computers come with small capacity SSDs? Most OS's take up around 20 to 30 GBs of space, so what are the benefits of such a small SSD? Are these small size SSDs for caching? and what exactly does caching mean (what does it do and how does it help)?

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• Can You Specify Where LVM Snapshots Are (Initially) Stored?

  - by bottles

  Disclaimer: this is my first time using lvm. Upon RTFM, it appears that LVM snapshots are automatically stored in the same directory as the original logical volume. In my case, that would mean the /dev directory. This isn't very nice, because there's not enough disk space in there for me to store a large snapshot. So when I run a command like lvcreate --size 1G --snapshot --name snapshot /dev/lvmData/usr, I need an additional 1G of space free in /dev? Is there any way to specify a different directory in which to store my snapshot?

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• "Undeleting" partition (NTFS) - recommendations?

  - by kagali-san

  So I have a drive which either suffered from hardware error or, possibly, got a little shock from badly configured Windows unattended install started on the same PC (the drive in question wasn't the install drive..). Quick exam shows that filesystem is seemingly intact, as some data recovery tools work with it (UnFormat rated it as "Excellent"). This may mean that a copy of partition table exists on disk, or a copy of MFT survived whatever happened, or.. Any idea how to restore partition tables/FS header, add a drive letter thus let Windows to mount the filesystem as if nothing happened? (I guess there must be tools of this kind)

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• mongodb replication: no primary elected

  - by Max

  I have three servers with mongod installed on it running as a replication set. Suddenly the two secondories became unavailable (the mongod process died) - I think because they were too stale. The problem is that the original PRIMARY is now the SECONDARY and my application doesn't work because it can't connect to a PRIMARY. I mean, in which way does that help me? If the replica set can't do failover?! Am I missing something? Furhtermore I am asking myself why did the SECONDARIES die / why are they too stale? What can I do about it? FYI: My database is quite big (40GB on disk).

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• Nightly backups (and maybe other tasks) causing server alerts

  - by J. Pablo Fernández

  I have two independent alert notification systems for my servers. The server is a virtual machine on Linode and one of the alerts comes from Linode. The other monitoring system we use is New Relic. They are both watching out for IO utilization. Every night I get alerts from both of them as the server is using too much IO. I run quite a few tasks in the middle of the night but the one I confirmed that can cause IO-warnings is running the backups. The backup is done by s3cmd sync. I tried ionice but it still generates the warnings. Getting warnings every night reduces the efficacy of warnings when they happen for real. For Linode I could raise the level at which a warning is issued, but it might mean making the whole thing useless as the level is too high. What would be the proper solution for this?

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• Can I sleep one of the displays on a dual-monitor setup? [duplicate]

  - by archedpenguin

  This question already has an answer here: Can I sleep one of the displays on a dual-monitor setup (running Windows 7)? 4 answers I want to be able to 'put the display to sleep' on one of my two monitors when it isn't needed, so it doesn't distract me or use unnecessary power. Ideally, the display would be asleep, but the OS would remain in dual-monitor mode, so I could still have a variety of windows open in the sleeping monitor's display space, which would mean I wouldn't have to keep switching between single- and dual-monitor modes. Its the same as "Can I sleep one of the displays on a dual-monitor setup (running Windows 7)?" I just wasn't sure I could comment on such an old thread. None of the answers there provided a perfect solution and I was wondering if there is now a solution available.

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