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• High load without explanation

  - by Sebastian

  I have a very high load on my machine and don't know what is responsible or how to find out. On the machine runs a jboss appserver and mysql. Here is a top from the user at peak time: top - 16:23:01 up 101 days, 6:50, 1 user, load average: 23.42, 21.53, 24.73 Tasks: 9 total, 1 running, 8 sleeping, 0 stopped, 0 zombie Cpu(s): 17.2%us, 1.6%sy, 0.0%ni, 80.4%id, 0.1%wa, 0.1%hi, 0.7%si, 0.0%st Mem: 16440784k total, 16263720k used, 177064k free, 151916k buffers Swap: 16780872k total, 30428k used, 16750444k free, 8963648k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 27344 b 40 0 16.0g 6.5g 14m S 169 41.7 1184:09 java 6047 b 40 0 11484 1232 1228 S 0 0.0 0:00.01 mysqld_safe 6192 b 40 0 604m 182m 4696 S 0 1.1 93:30.40 mysqld 7948 b 40 0 84036 1968 1176 S 0 0.0 0:00.07 sshd 7949 b 40 0 14004 2900 1608 S 0 0.0 0:00.03 bash 7975 b 40 0 8604 1044 840 S 0 0.0 0:00.44 top The CPU usage of the java process is normal. The peaks only show up when i deployed a certain web application. Could the resulting network traffic boost the load in such way that i don't see it in top?

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• Mac OS X Terminal get in Macintosh HD? For using Git and Github

  - by user63119

  I wanted to get started with using Git and Github especially for installing Web software to my htdocs directory. htdocs is the folder in which you put all your websites that then run by using MAMP -- Apache server, PHP, MySQL and stuff. This not the real problem though, the problem is I am in the terminal and see this: imac-van-jeroen-*******-2:~ JeroensiMac$ And using cd ~ or cd .. just results back in the line above, which is usual. The problem is that all my applications and everything really is not on my user but in the Macintosh HD. Macintosh HD/applications, or Macintosh HD/applications/MAMP/htdocs/ I want to be in the Terminal and go to my Macintosh HD (is this referred to as being superuser?). I want to know if this is just my fault for installing everything on my Macintosh HD instead of Macintosh HD/users/JeroensiMac/~. Also I would like to know if its possible at all, and I am just missing something. And If I am not doing anything wrong is it safe to use Git(Github) with directories in my Macintosh HD?

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• Windows XP SP3 install keeps rebooting

  - by TerryR

  The base fonts on my Windows XP Pro were corrupted. A suggested fix was to "install" XP again, essentially just to overwrite the WINNT folder hence resetting all the fonts. I downloaded the XP Pro SP3 installer from our corporate MSDN account, ran it straight from the HDD and at the very end it crashed and rebooted. Now it just keeps rebooting over and over after saying "Continuing installation...." I can't boot in Safe Mode, I can't get to a command prompt or anything. I'm out of ideas. Formatting the drive and performing a fresh install is NOT an option.

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• ATI radeon hd 5450 Graphics Card Issues

  - by RGM-79FP GM Striker

  I have an Old Dell Optiplex 755 SFF with an Intel Core 2 Processor (windows 7). Now This can hold a PCI-E x16 port. Now I got an ATI Radeon HD 5450 low profile. I plugged and played and it fits without a hitch, the software installed too! , now for the graphics well... It doesn't really work at all as it seems to freeze at the moment that it loads on the windows logo. It loads into safe mode so I'm not really sure what the problem is. Any ideas, I read the dell forums and they should be somewhat compatible... with the specs so I'm at a loss here. and I am a novice here. Ideas? Edit I have tried to reset the cmos,no luck there. I have tried to move the ram as well. nothing big happened.

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• Can I cancel a resize operation in GParted without causing data loss?

  - by Anderson Green

  I'm currently waiting for GParted to finish resizing a partition, but the progress bar is currently at 0, and it's been taking much longer than usual (perhaps an hour). Is it safe to cancel the resize operation? I don't want to wait days for the resize operation to complete, but I don't want to lose all of my files either. (Is there any way that I can simply pause the resize operation, attempt to recover files, and then resume the resize operation?) (An update: the operation has finally completed, and my files are still intact!)

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• Plesk file permissions - Apache/PHP conflicting with user accounts.

  - by hfidgen

  Hiya, I'm building a Drupal site which performs various automatic disk operations using the apache user (id=40). The problem is that the site was set up on a subdomain belonging to user ID 10001 (ie my main FTP account) so the filesystem belongs to that user ID. So I keep getting errors like this: warning: move_uploaded_file() [function.move-uploaded-file]: SAFE MODE Restriction in effect. The script whose uid is 10001 is not allowed to access /var/www/vhosts/domain.com/httpdocs/sites/default/files/images/user owned by uid 48 in /var/www/vhosts/domain.com/httpdocs/includes/file.inc on line 579. I've tried changing the apache group in httpd.conf to apache:psacln, psacln being the default group for all web users but that's not helped. The situation now is: ..../files/images/ = 777 and chown = ftplogin:psacln ..../files/images/user = 775 and chown = apache:psacln ..../files/tmp = 777 and chown = ftplogin:psacln So apparently uid 40 and 10001 both have permissions to write to any of the 3 directories involved, but still can't. Am i missing something here? Can anyone help? Thanks!

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• Permission settings for apache2 web content directories with several users?

  - by John

  Hi there. I've got a Debian VPS set up with a LAMP-stack. My apache2 instance runs on the user account 'www-data'. In addition to the root account and the service accounts I have several user accounts belonging to friends, family and myself that includes FTP-access. This is to allow the users to drop files to the root of their domain which is located in their home folder. I am having issues with setting the correct permissions so that Apache is able to serve the content ("403 Forbidden"). I could just do a 'chmod -R 755 *' on the entire www-directory for each domain, but from what I gather that's not a good idea. Here's an example of the structure: apache2 is run by 'www-data' User 'john' has this home folder structure /home/john/domains/somedomain.com/www /home/john/domains/sub.somedomain.com/www How can I keep things safe while still allowing users to upload content via FTP, and allow for file-uploads in lets say Wordpress?

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• Why did my power supply fry itself?

  - by ULTRA_POROV

  I am in europe. There was a switch on my psu that could switch the voltage between 230v and 130v (not 100% sure). In europe we use 230. I switched the psu to 110 and turned it on. Several sparks and a power failiure resulted, the psu was fried. Can someone explain why this happened. I was assuming that because the system was using 230 and the psu only draws 130 it would be safe cause it's less. I guess i was wrong. Can someone explain me the physics behind this.

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• Squid Proxy Antivirus - Recommendations / Performance

  - by Jon Rhoades

  Due to our user's increasing expertise at downloading virus and the like, we are investigating adding Antivirus to our Squid proxy. A casual Google reveals several free and one paid: HAVP squid-vscan Viralator Safe Squid (commercial) None of the 'free' ones have reached v1 yet, nor do any inspire huge confidence form their websites (although of course I would rather they spent their time on the app rather than their website!). Does anybody have experience with any of these (or any other similar apps). If so are they suitable for a production network with 400ish concurrent users, and what sort of CPU/RAM requirements does it have?

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• Secure external connection to SQL Server (from third party software)

  - by Bart

  I have a SQL Express 2008 R2 server running on a server in an internal lan network. A few databases are used by some third party software to store data. A SQL-Server user is used by this application to connect to the database. Now I need to access this database using a local installation of the software from an external pc. In this particular case a VPN connection is not the solution I am looking for. I have access to an external linux server, so I tried ssh tunneling from the windows server to the linux server and use the external pc to tunnel it back from the linux server to the client, but this is working very very slow. What are my other options to allow this external connection in a safe way?

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• Mac Book Refuses to Boot

  - by pas09

  I have a Macbook that has unfortunately died on me. I randomly got a pop up message that said I needed to restart my computer, and once I did, I was greeted with the blinking folder question mark start up screen. I've tried everything, including running Disk Utility repair and reformatting the hard drive and reinstalling OS X. All of my data is backed up and safe, I just need my computer to start again. Before I go off and buy a new hard drive, I wanted to see if there is anything I might have forgotten.

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• Trackpad and battery on stop working at same time

  - by Alex Krycek

  Gateway E-475M G Windows 7 Professional SP1 Synaptics TouchPad 15.2.20.0 Microsoft ACPI-Compliant Control Method Battery 6.1.7600.16385 It seems that when my battery stops working correctly, my touchpad will also act erratically. Specifically, the computer will charge for a few seconds, then stop charging for another few seconds. This will continue for some time. But if I close the lid, the charging LED will stay lit. As for the touchpad, it'll click or highlight things at random when I can get it to move. As a test, I stopped charging my computer. Now it seems my touchpad is working fine. I've tried to reinstall both the battery and touchpad drivers. I've also started the computer in safe mode, but that didn't help either. Edit: I've now tried booting my computer with an Ubuntu live cd, and the charging problem persists. So, it now seems my computer can only charge continuously as long as it's turned off or sleeping.

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• Acer Aspire 3820TG video card driver issue for Windows 8 Pro

  - by supernx

  The model for Acer laptop is ATI mobility Radeon 5650. I am using Windows 8 Pro from MSDN. It was working fine until two days ago when Microsoft pushes an update. After the update, my video card stops working and I only see black screen after loading splash screen. I can go in Safe Mode. I tried to install driver from AMD website but it failed with error message "load detection driver failed". Anyone else have the same issue? Any idea how to solve this? I need to go in Win8 for my latest development.

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• How do you search for backdoors from the previous IT person?

  - by Jason Berg

  We all know it happens. A bitter old IT guy leaves a backdoor into the system and network in order to have fun with the new guys and show the company how bad things are without him. I've never personally experienced this. The most I've experienced is somebody who broke and stole stuff right before leaving. I'm sure this happens, though. So, when taking over a network that can't quite be trusted, what steps should be taken to ensure everything is safe and secure?

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• Starting and stopping X11 and LXDE from command line

  - by Radian

  I have a Raspberry Pi with Debian Wheezy (Raspbian) and so far I've managed to learn quite a lot about Linux just playing around, but I have a few questions for all you seasoned Linux pros out there. 1) From command line, if I execute startx, X11 will launch followed by LXDE. If I had a monitor connected, I'm imagining I would see a transition from command line to the desktop environment. Can I launch X11 first with x, then start LXDE on top of X11 afterwards with /etc/init.d/lxdm start (is this correct?) and get to the same result as startx? 2) Instead, let's say I executed /etc/init.d/lxdm start alone, would X11 start automatically (since LXDE relies on X11)? 3) From desktop, if I CTRL+ALT+F1 to get back to command line, then I should be able to shutdown LXDE using /etc/init.d/lxdm stop. Does X11 automatically close with the termination of LXDE? 4) What is the proper/safe way to shutdown X11? Thanks

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• Not able to access a folder in Windows 7 and not able to see in Ubuntu.

  - by Rohit

  I have four partitions on my hard disk. Partition C has Windows XP installed and Partition G has Windows 7 installed. Ubuntu 10.10 is also installed, probably in F. Partitions C and G are NTFS. When I boot into C, XP is loading but when I click on the C Drive in MyComputer, it displays: "Access is denied". Windows 7 displays the folder tree of C, but when I try to open a folder, I am not able to view the contents. The same error: of Access Denied. When I try to view the C Partition using Ubuntu, the entire C partition is not visible. I tried following commands to take ownership of the C drive: takeown /f C: cacls C: /G Rohit:F but still I am not able to get rid of "Access Denied". I again tried the above commands from the Windows 7 safe mode, but still the problem persists. The two commands return "Successful", but nothing is happening.

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• How good is PDF password protection?

  - by Tim

  It appears that Word's password protection is not really good, at least until Office 2003, if I read this SU entry correctly. I'm under the impression that Acrobat's PDF password protection should be better (it says 128-bit AES for Acrobat 7 and higher). Is that true? Of course, it depends on the strength of the password used, but assuming I protect my PDF with a password like sd8Jf+*e8fh§$fd8sHä, am I on the safe side? Like, say, for sending confidential patient information - not really valuable, but potentially highly sensitive.

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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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• What can I do to give some more love and disk space to my database on Ubuntu?

  - by Yaron Naveh

  I'm new to linux. I've deployed a db to ubuntu server on amazon and found out I'm low on disk space. did df (see below) - and found out that I'm 89% capacity on one file system, but less on others. What does this mean? Do I have a few partitions and can now utilize others besides /dev/xvda1? Also /dev/xvdb seems large, is it safe to put the db in it and only use it? If so do I need to mount it or do something special? $> df -lah Filesystem Size Used Avail Use% Mounted on /dev/xvda1 8.0G 6.7G 914M 89% / proc 0 0 0 - /proc sysfs 0 0 0 - /sys none 0 0 0 - /sys/fs/fuse/connections none 0 0 0 - /sys/kernel/debug none 0 0 0 - /sys/kernel/security udev 3.7G 8.0K 3.7G 1% /dev devpts 0 0 0 - /dev/pts tmpfs 1.5G 164K 1.5G 1% /run none 5.0M 0 5.0M 0% /run/lock none 3.7G 0 3.7G 0% /run/shm /dev/xvdb 414G 199M 393G 1% /mnt

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• Firefox: This connection is untrusted + Behind corporate firewall

  - by espais

  I've seen some similar issues strewn throughout Google's results about this, but none seem to be corporate-specific. I continually get the 'This connection is untrusted' screen every time I attempt to log into a secure site...for instance Gmail. This is pretty annoying as sometimes I have to go through the process of adding the exception two or three times before it finally lets me into Gmail. I am behind a corporate firewall, going through an internal proxy server to get to the Internet, so there is no possibility for me to update the firewall...etc. Does anybody know a way around this? Can it simply be disabled (and is that safe)? EDIT I'm going to reopen this question with a bit of new information. I have been using Google Chrome lately until today, and one thing that I noticed was that I never had this issue when using either Chrome or Internet Explorer. Is there something that these other browsers do that I need to manually do in FF?

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• Splitting CA component off puppet master

  - by Dennis LeMioux

  We are scaling our puppet infrastructure and would like to split off the CA component from the puppet master server to another server. Part of the change involves a servername change for the puppetmaster too. I'm no puppet expert but i'm at a point where I -think- we need to create a SAN cert with both the old and new names in it (to be safe), and then re-sign all the agent nodes all over again which is going to be a royal PITA. Is there a quicker/smarter way to do this? We already have hundreds of agent nodes out there and individually re-signing them will be an arduous task.

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• Concerns with compressing sensitive data in OSX

  - by Derek Adair

  Hi, I have some really sensitive data that I am trying to compress and back up so I can reformat. It's absolutely imperative that nothing happens to these files. I'm a developer so I have very little room for error... plus I'd really hate it if any of my .mp3's got corrupted! File Formats Include... .mp3 .php .js .ai - .psd - .flv (and many more) Is the mac OSX file compression safe enough? Or should I look elsewhere? Is there a more efficient/secure file-format other than .zip (i'm assuming so...)

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• Is the motherboard the cause of these errors?

  - by ianfuture

  Motherboard is : ASUS A7N8X-E Deluxe, Rev1.01, On start up get: "cmos checksum error - defaults loaded" error BIOS is reset everytime and can't boot to Windows off HDD. POST report is ok once I tell it there is no Floppy drive attached and not to seek it. The boot sequence starts then just as get to load windows safe mode options whole PC shuts down. BIOS is reset to defaults again. I've checked the battery and jumpers. Tried a known working battery. Changed Graphics card, changed memory, changed HD to one without an OS. Disconnected DVD drive. PSU is known to be ok. IN BIOS CPU is recognised correctly and memory is also recognised ok. So is it likely to be a bad motherboard or corrupted BIOS or something else? Thanks :)

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• Command line safety tricks

  - by deadprogrammer

  Command line and scripting is dangerous. Make a little typo with rm -rf and you are in a world of hurt. Confuse prod with stage in the name of the database while running an import script and you are boned (if they are on the same server, which is not good, but happens). Same for noticing too late that the server name where you sshed is not what you thought it was after funning some commands. You have to respect the Hole Hawg. I have a few little rituals before running risky commands - like doing a triple take check of the server I'm on. Here's an interesting article on rm safety. What little rituals, tools and tricks keeps you safe on the command line? And I mean objective things, like "first run ls foo*, look at the output of that and then substitute ls with rm -rf to avoid running rm -rf foo * or something like that", not "make sure you know what the command will do".

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• Can my PowerMac G3 B&W really take a harddrive larger than 128GB?

  - by Josh Calvetti

  So it's a well known fact that the PowerMacs manufactured before 2002 cannot take a harddrive larger than 128GB. I have an old B&W that was running 10.4, and upon putting a 250GB drive inside, it told me that I had inserted a 128GB. That was expected. However, I recently decided to turn that machine into a Debian home file server. I shoved the 250GB drive inside, did some formatting, and now it tells me that it is a 250GB drive. Is this safe to use? Will all my data go corrupt after I've added more than 128GB of stuff? In case the specs are helpful to have, it's a 400MHz B&W, 1GB RAM, Rev. B.

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