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• Mount --bind persistence over reboot

  - by vnuk

  I'm having trouble finding an answer for this question Does mount --bind persist over reboot? On my CentOS it looks like it doesn't, so I've placed apropriate mount --bind calls in rc.local. How can I do mount --bind to avoid rc.local scenario?

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• Are there disagvantages to using Outlook's Chached Exchange Mode?

  - by Rax Olgud

  Since I found out about Outlook's "Cached Exchange Mode" I've been using it, and I also set it up on every PC I come across. I think it's a great feature that improves the efficiency of of every Outlook user, and I don't understand why it's not ON by default. My question is - are there any disadvantages to using Cached Exchange Mode? (Besides the obvious fact that it consumes a bit more space, which I don't see as a big issue nowadays)

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• In CPanel, cron job is not being executing and not sending any mail

  - by Abhishek

  though many of us has asked many question related to cron jobs, let me ask my one... I want to execute a PHP script periodically. As a cron command I'm using: php -q http://www.example.com/cron.php?action=getA I also tried this one: php -q /home/myuser/www.example.com/cron.php?action=getA It is not getting executed and not sending any mail. I set the mail ID to my gMail ID. What am I doing wrong?

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• BGP Dual-As support, any RFC?

  - by Saran

  Generally most of routers like cisco and junos allow a router to have dual-As to be configured via a "local-as" command which overrides the global as-number configured in "router bgp ". Also local-as prepending may or may not happen based on configurations; for example "no-prepend" in cisco. Now my question is, is there any RFC which which standardises this Dual-As support?? Which provides guidelines on whether or not to prepend the "local-as" to As-Path attributes in the Bgp updates ?

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• Samba server with Virtual Box Guest

  - by Anwar Shah

  I want to setup a samba server on My Ubuntu host for My Windows Guest in Virtual Box. I am using Ubuntu 12.04 and Windows version is Windows XP. VirtualBox 4.1.0.0 The Question is : How can I achieve this or Is it possible? Note: I am not trying to use the shared folder feature of Virtual Box. I used that feature already. Please Remember that I have only a physical machine. The other one is virtual.

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• Any way to recover ext4 filesystems from a deleted LVM logical volume?

  - by Vegar Nilsen

  The other day I had a proper brain fart moment while expanding a disk on a Linux guest under Vmware. I stretched the Vmware disk file to the desired size and then I did what I usually do on Linux guests without LVM: I deleted the LVM partition and recreated it, starting in the same spot as the old one, but extended to the new size of the disk. (Which will be followed by fsck and resize2fs.) And then I realized that LVM doesn't behave the same way as ext2/3/4 on raw partitions... After restoring the Linux guest from the most recent backup (taken only five hours earlier, luckily) I'm now curious on how I could have recovered from the following scenario. It's after all virtually guaranteed that I'll be a dumb ass in the future as well. Virtual Linux guest with one disk, partitioned into one /boot (primary) partition (/dev/sda1) of 256MB, and the rest in a logical, extended partition (/dev/sda5). /dev/sda5 is then setup as a physical volume with pvcreate, and one volume group (vgroup00) created on top of it with the usual vgcreate command. vgroup00 is then split into two logical volumes root and swap, which are used for / and swap, logically. / is an ext4 file system. Since I had backups of the broken guest I was able to recreate the volume group with vgcfgrestore from the backup LVM setup found under /etc/lvm/backup, with the same UUID for the physical volume and all that. After running this I had two logical volumes with the same size as earlier, with 4GB free space where I had stretched the disk. However, when I tried to run "fsck /dev/mapper/vgroup00-root" it complained about a broken superblock. I tried to locate backup superblocks by running "mke2fs -n /dev/mapper/vgroup00-root" but none of those worked either. Then I tried to run TestDisk but when I asked it to find superblocks it only gave an error about not being able to open the file system due to a broken file system. So, with the default allocation policy for LVM2 in Ubuntu Server 10.04 64-bit, is it possible that the logical volumes are allocated from the end of the volume group? That would definitely explain why the restored logical volumes didn't contain the expected data. Could I have recovered by recreating /dev/sda5 with exactly the same size and disk position as earlier? Are there any other tools I could have used to find and recover the file system? (And clearly, the question is not whether or not I should have done this in a different way from the start, I know that. This is a question about what to do when shit has already hit the fan.)

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• numeric keypad functions on compact or tenkeyless keyboard

  - by RedGrittyBrick

  I am purchasing a keyboard without a numeric pad (a Cooler Master Storm Rapid but my question probably applies to any keyboard without a numeric pad) I very occasionally use the numeric pad on my current keyboard, in conjunction with the Alt key, to enter special characters. If the keyboard does not make any special provision for this (no obvious keypad overlay on main section of keyboard, nothing on this subject in user-guide) - is there any way to retain this Alt+nnn capability under Windows-7?

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• Per bytes RAM memory acess

  - by b-gen-jack-o-neill

  Hi, I have just a simple question. Today memory DDR chips are 64 bits wide, and the CPU data bus is also 64 bits wide. But memory is stil organised in single bytes. So, what I want to ask is, when CPU selects some memory adress, it should be one byte, right? Becouse the lowest memory portion you can access is 1 byte. But, if you get 1 byte per 1 adress, why is memory bus 8 bytes wide?

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• Mysql Servers for Attendance System

  - by foo

  I'm building an attendance system. There are about 20 places where people will check in and check out using Mifare 1K Card. It will use MySQL as the database. The system will display something like "#ID IN: 800AM" when the first time the user checks in and "#ID OUT: 400PM" when the user checks out. For this to work, all the databases need to be synchronized with each other all the times. For an example, if user A went to location #1 to check in but by the time he wants to return home, the server at location #1 went down, he needs to go to location #2 or the nearest server to check out. The server at location #2 should display '#ID OUT: 400PM" and not "#ID IN: 400PM" since he's already checked in. So, what should I use to ensure this idea will work? My main concern is with the network (other department manages it) which is very unpredictable. It just love to go down anytime it wants to. Update LOL, didn't realize my question is not clear, just noticed it when you guys pointed it out, sorry about that. My real question is, how can I configure my MySQL to be synchronized with each other (20 servers)? MySQL cluster ? (tried reading about it, but I'm not sure if it's the right thing to do) My current setup (first phase): Local database for each server OS: Slackware A main server that keeps track which staff is at which server A web based front end for the user to see their history (which connects to the server based on their records) Main Pros No worries about network problems since it is a local database Main Cons A user can only check in and out at the same server. Databases/Servers are not connected with each others. Have to add the user to each server if the users want to check in at different locations. Which means, if he wants to go to location A, he must be checked out from location A first and then check in at location B. The server at location B didn't know that the user has checked in before at A. By the way, I've already centralized my NTP to a local server. About the network, let's just say, I don't have the authority to make changes so that the network will be better. The network won't effect all 20 servers at once, usually, just a few of them for several times a week. If there are anything else you would like me to answer, please just ask.

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• HowTo use my iPhone as WebServer?

  - by mosg

  Hi. Is there any people who deal with this issue? My iPhone: 3G PS: I'm asking this question, because in not so far future I want to buy new iPhone (3GS or 4G perhaps), and I don't know what to do with my old one. :) PSS: Comments "u can send it to me" or "just sell this old sh't" will not be useful!) Thank you!

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• Automating silent software deployments on Solaris 10

  - by datSilencer

  Hello everyone. Essentially, the question I'd like to ask is related to the automation of software package deployments on Solaris 10. Specifically, I have a set of software components in tar files that run as daemon processes after being extracted and configured in the host environment. Pretty much like any server side software package out there, I need to ensure that a list of prerequisites are met before extracting and running the software. For example: Checking that certain users exists, and they are associated with one or many user groups. If not, then create them and their group associations. Checking that target application folders exist and if not, then create them with preconfigured path values defined when the package was assembled. Checking that such folders have the appropriate access control level and ownership for a certain user. If not, then set them. Checking that a set of environment variables are defined in /etc/profile, pointed to predefined path locations, added to the general $PATH environment variable, and finally exported into the user's environment. Other files include /etc/services and /etc/system. Obviously, doing this for many boxes (the goal in question) by hand can be slow and error prone. I believe a better alternative is to somehow automate this process. So far I have thought about the following options, and discarded them for one reason or another. 1) Traditional shell scripts. I've only troubleshooted these before, and I don't really have much experience with them. These would be my last resort. 2) Python scripts using the pexpect library for analyzing system command output. This was my initial choice since the target Solaris environments have it installed. However, I want to make sure that I'm not reinveting the wheel again :P. 3) Ant or Gradle scripts. They may be an option since the boxes also have java 1.5 enabled, and the fileset abstractions can be very useful. However, they may fall short when dealing with user and folder permissions checking/setting. It seems obvious to me that I'm not the first person in this situation, but I don't seem to find a utility framework geared towards this purpose. Please let me know if there's a better way to accomplish this. I thank you for your time and help.

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• Need for page file with 12 GB RAM

  - by MartinStettner

  Hi, I recently got my new PC with 12 GB RAM (running Windows 7 64bit). The default installation suggests a 12 GB page file on the system drive (which I think is both inefficient and expensive on a SSD drive...) I'm wondering if I need any virtual memory at all, 12 GB being more than I had on my previous machine including the page file (I had 3GB RAM + 3GB pagefile). Thanks Martin EDIT As mokubai pointed out, the question is pretty much answered in Windows 7 pagefile size with large RAM and SSD

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• Does using a tiling window manager make a terminal multiplexer obsolete?

  - by Jan Westerdiep

  Since about half a year I have been enjoying a terminal multiplexer (tmux, to whomever it may concern), and have grown to like it. I would like to try a tiling WM as opposed to a stacked one some time in the future but cannot wrap my head around this simple question: Why would one use the splits in a multiplexer within a tiling WM? Is there an upside, besides of course the single instance you'd be running?

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• icacls batch file multiple directories with wildcards help needed

  - by user153521

  I have written the following batch file that does a great job combing through all folders beginning with the number 3 and applying folder permissions to any 2010 subfolder. Example of the batch filesis below: for /D %%f in (D:\Data\3*) do icacls "%%f\2010" /inheritance:r /grant:r "Domain Admins":(OI)(CI)F Question : How can I improve this script to allow for me to apply the permissions to a specific folder below ANY folder within the folders beginning with 3? here is an example of my failed attempt: for /D %%f in (D:\Data\3*) do icacls "%%f*\specificfolder" /inheritance:r /grant:r "Domain Admins":(OI)(CI)F

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• Should I join technicians' laptops to our domain?

  - by TooFat

  I have been charged with distributing about a dozen laptops to technicians at our company that will spend almost all of their time in the field not connected to our network. They may come in for quarterly meetings and may or may not connect their laptops to the network. My question is what are the benefits or disadvantages of joining these laptops to our domain and under these circumstances (given what I describe above) what would you do?

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• Store profile image of all users into single directory or per subdirectory id?

  - by Luccas

  I'm using amazon s3 as storage for users profile pic. I see that many websites generates large random filenames and put them into the same root directory like: http://xxx.us-east-1.amazonaws.com/aHR0cHM6Ly9mYmNkbi1wcm9maWxlLWEuYWthbWFpaGQubmV0L2hwcm9maWxlLWFrLWFzaDIvMjczMzkxXzEwMDAwMDMxMjAxMzg5OV81NTk3MjM4Mzdfbi5qcGc.jpg And my question is: What are the pros and cons of that approach? If I palce them into different directories, what problems I will have in future? http://xxx.us-east-1.amazonaws.com/users/id/username.jpg or http://xxx.us-east-1.amazonaws.com/users/id/random_number.jpg Thanks!

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• Checking if my PC working correctly

  - by aiacet

  hello to everyone and thanks in advance to all the spuer-users than will aswering to my question.Can you suggest me an utility, software or program than can check if my PC is well configured?That can check if communication between all the components works correctly?that can indicate to me if the OS work properly?That can check if ram and memory paging is configured correctly? Waiting for your gentle answers, best regards Ajax

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• cURL connection error (60): SSL certificate pr0blem on Windows

  - by Cheeso

  When I try to use Curl on windows, to retrieve an https url, I get the dreaded "connection error (60)." The exact error message is: curl: (60) SSL certificate problem, verify that the CA cert is OK. Details: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed More details here: http://curl.haxx.se/docs/sslcerts.html How to resolve this? ps: I spelled the word "Problem" wrong in the title purposefully, because superuser refuses to accept the question with the correct spelling.

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• What is the "updater" in Plesk control panel actually updating?

  - by Dougal

  Is it performing operating system package updates (with yum or what-have-you)? Or is it just updating Plesk itself? As a bonus question, if it isn't performing operating system package updates, then how does one do that with a Plesk server?

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• Tape vs SSDs backups regarding long-term storage reliability

  - by user66131

  My question is very specifically about solid state drives, not regular hard drives. I would like to put in place a grandfather-father-son backup scheme, with the SSDs being used for the grandfather and father portions, and the yearly grandfather would be locked in a safe offsite for maybe 5-10 years. Can I expect that after this period of time the data would be preserved as well as it would be on a tape?

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• Is there any reason to use a different app other than iMovie to record video via webcam of a long le

  - by dr dork

  Is there any reason to use a different app other than iMovie to record video via webcam of a long lecture I'll be attending? If so, what is that app and why? Just as a note, I don't plan to do any kind of editing of the video, just recording only. Thanks so much in advance for your help! I'm going to continue researching this question right now.

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• Sync photos to ipod touch without optimization

  - by nijikunai

  Every time I sync my ipod touch with itunes, the photos get their resolution reduced. Is there a way to turn off this "optimization"? (There's already a question here about this, but the answer no longer works)

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• Nginx Global Error Page

  - by sidprak

  I see this question was also asked here: Configure Nginx global error page but there wasn't a suitable answer. I am currently allowing only certain IPs to some of my sites and would like Nginx to drop connections from the rest of the IPs instead of returning a 403. Ideally, I would like to do this without configuring each site separately. I have this in the http section: error_page 403 =444; But, now, it tries to serve up the page =444 instead of returning a 444.

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• MB with CPU and power supply - can be turned on but not off [closed]

  - by COcodrilo

  Hi, Not sure whether this question belongs here, I hope so. I have just bought a motherboard and CPU. I have installed the CPU, cooler and connected to CPUFAN on the MB. I have plugged the power supply to MB and the cable from "ON" button to pins named "PWR" and the LEDs. However when I turn on the PC, both HDD and POWER leds are continously on and the PC cannot be turned out. What could I be missing?

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• How do Windows 7 encrypted files look like?

  - by Sean Farrell

  Ok this is kind of an odd question: How do Windows 7 (Home Premium) encrypted files look like "from the outside"? Now here is the story. An acquaintance of a freind of mine got a nasty virus / scareware. So I wiped out my PC technician cap and went to work on it. What I did was remove the drive from the laptop and put drive into my external drive bay. I scanned the drive and yes it was loaded with stuff. That basically cured the infection and I could start the system back up. To check if it cured the problem I wanted to see the system while running. There where two user accounts, on with a password and one without (both admin users !?!). So I logged into the unprotected user and cleaned up the residual issues, like proxy server to localhost in the browser config. Now I wanted to do the same for the password protected user. What I noticed that from my system and the unprotected user account the files of the protected user looked garbled. The files are something like 12 random alphanum chars, but the folders looked ok. Naive as was thought this might be how encrypted files looked "from the outside". (I never use Microsoft's own security features, so how would I know. TrueCrypt is one big blob.) Since the second user could not be reached, I though sod it and removed the password from the account. (That might have been a mistake, I know.) Now I did the same clean up tasks and all nice and fine; except for the files which where still "encrypted". So I looked into many Windows Encrypted Files recovery posts and not all hope is lost, since I should be able to extract the certificate and with the password regain access to the files. Also note that windows did "only" prompt me that removing the password would be insecure, not that access to encrypted files would be lost, like it is claimed in most recovery articles. Resetting the password did not help and I gave up for the night. The question that nagged me half of the last night was, what if the files are not encrypted, but the scare-ware encrypted / destroyed the files? I don't want to spend hours of work trying to recover files that are not recoverable. The ting is that the user does not remember turning it on and aren't the files marked in blue and the filename is readable? Many thanks for input from users who have more knowledge about WEF...

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