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• "Slave" user accounts in GNU/Linux

  - by Vi

  How to make one user account to be like root for some other user account, e.g. to be able to read, write, chmod all it's files, chown from this account to master and back, kill/ptrace all it's processes and to all thinks root can, but limited only to that particular slave account? Now I'm simulating this by allowing "master" user to "sudo -u slaveuser" and setting setfacl -dRm u:masteruser:rwx ~slaveuser. It is useful as I run most desktop programs in separate user accounts, but need to move files between them sometimes. If it requires some simple kernel patch it is OK.

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• Dell Latitude E4300 TouchPad - Odd Behavior

  - by Cade Roux

  I'm seeing some intermittent behavior on the touchpad. First it wasn't working at all. Then during restart, for a little while it seemed like the buttons attached to the joystick and external mouse were both swapped left/right. Then I went in to the dell touchpad control and disabled the touchpad and re-enabled it and nothing happened. Then a short while after disabling the joystick the touch pad started working. So I restarted to see if it would keep the settings and before login, the touchpad appeared to work, then after login it stopped working for a few minutes while login continued. Then after the login was almost completed it started to work again. It appeared to have retained the settings for the disabled joystick. It seems like perhaps there are conflicting mouse drivers trying to simultaneously or similar. This doesn't seem normal for the touchpad to be disabled for so long after login. What steps should I take to ensure the drivers are right?

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• What do encrypted files' data look like?

  - by Frost Shadow

  I know there are a lot of encryption programs available, that I would guess use different methods for encryption, and thus have different types of output files (.fve .tc .cha .dmg (bitlocker, truecrypt, challenger, ect.)), but if someone didn't know what the file was and just looked at the data, what would it look like? Does it just look like random bits, or can you still pick out a pattern? If it does look random, how is it if I moved the encrypted file to another computer, the other computer can tell it's a file, and is able to decrypt it (how would it even know where to start or stop, if it all looked random)? Also, how is the structure affected by encrypting files twice, using the same method, or a different one? Thanks for any help, and if you know any books or site about encryption for complete idiots, I'd appreciate it!

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• kernel openvpn segfault

  - by Rex

  e.. I have some trouble about OPENVPN these days.. At first,I find that the OPENVPN is always down. Then I try to restart it.But after a short while,It's down again. Then I check /var/log/messages and find something below openvpn[4338]: xxx.xxx.xxx.xxx:48484 Re-using SSL/TLS context openvpn[4338]: xxx.xxx.xxx.xxx:48484 LZO compression initialized openvpn[4338]: xxx.xxx.xxx.xxx:48484 [abc.abc_] Peer Connection Initiated with xxx.xxx.xxx.xxx:48484 kernel: openvpn[4338]: segfault at 0000000000000018 rip 00002b75ca30ca2e rsp 00007fff153806a0 error 4 Obviously,OPENVPN is Down. So,I just want to know what's wrong here..... P.s. The username should be abc.abc.But it shows that is abc.abc_ Is there something wrong? CentOS 5.4 x64 Linux 2.6.18-238.9.1.el5 My English is very pool... :( Thanks~

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• How do I reassemble a zip file that has been emailed in multiple parts?

  - by Guy

  I received 3 emails each containing part of a zip file. The extensions end in .z00, .z01 and .z02. (Emailed as such to get around the typical 10Mb attachment limit per email.) I have put all 3 files into one directory. I can use both 7-zip and WinZip to open the first file (the .z00 file) and it lists the contents of the zip but when trying to extract the files both programs are reporting errors. What is the least error prone way of reassembling this zip and getting to the files?

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• TeamViewer: How to disable color dithering for low-bit-depth screen settings

  - by gogowitsch

  I am using Terminal Services and TeamViewer a lot to access other computers, partly over slow networks. The problem described below is not affected by which of the two remote access services I am using. When accessing Windows 7 Professional machines, a great deal of text is hard to read as the background is dithered. Even for exactly the same colors, Windows 2003 does not seem to dither at all, but to choose the closest available color. I strongly prefer the latter, as I don't care for the exact colors, I just want to be able to read easily. I am not sure whether this is operating system-related. The programs on the remote systems do not allow me to change the color choices for the various backgrounds to anything sane. Is there a way to disable this color dithering using some target operating system setting that will do the trick for both Terminal Services and TeamViewer?

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• How do i enable deflate on apache2? debian

  - by acidzombie24

  I looked at the other answers and those solutions did not help. I am completely confused how to do this. I know almost nothing about apache nor how to use it and nearly all the article say write this but doesnt tell me where. So far i have done this # a2enmod deflate Module deflate already enabled Then i tried writing this in httpd.conf AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css Then i wrote a longer version which involved deflate.c. After those didnt work i deleted them all and wrote the AddOutputFilterByType line in apache2/sites-enabled/000-default inside of I used this to test http://www.whatsmyip.org/http_compression/ everytime it says no compression. I used another site but i could never compress. Also i restart the server everytime i save a file so what could be the problem and how do i enable this properly?

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• TCP connection stuck in SYN_RECV state despite ACK received, Linux 2.6.18, embedded, ARM

  - by waynix

  My client cannot connect to my protocol port (TCP) after some network glitches, even though all other protocols (telnet/HTTP/FTP) work fine. netstat shows that my server is listening and tcpdump on the server shows all 3 packets are exchanged: 18:29:16.578964 IP 10.9.59.10.3355 10.9.43.131.5084: S 2602965897:2602965897(0) win 65535 <mss 1460,nop,nop,sackOK> 18:29:16.579107 IP 10.9.43.131.5084 10.9.59.10.3355: S 3464857909:3464857909(0) ack 2602965898 win 5840 <mss 1460,nop,nop,sackOK> 18:29:16.579284 IP 10.9.59.10.3355 10.9.43.131.5084: . ack 1 win 65535 But somehow netstat -t shows the connection still in SYN_RECV, as if the ack is not seen by the TCP state machine. I have to restart my server to get it to work. syncookie is not enabled, and I know from client code behavior and tcpdump that there is no SYN flooding. Help much appreciated.

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• how to automatically accept license with mounting mac osx .dmg files from command line?

  - by Vitaly Kushner

  Im automating my mac installation using 'puppet'. as a part of it I need to install several programs that come in a .dmg format. I use the following to mount them: sudo /usr/bin/hdiutil mount -plist -nobrowse -readonly -quiet -mountrandom /tmp Program.dmg The problem is that some .dmg files come with a license attached, and so script is stuck accepting the license. (there is no stdin/out when running with puppet, so I can't manually approve it to continue). Is there a way to pre-approve or force-approve the license?

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• Problem whit usb wireless mouse

  - by aiacet

  Recently i have thi problem whit my wireless mouse (Trust model on: www.trust.com/15313). Sometimes when i start the Pc or during a game the pointer/arrow stop to move it. In the Pc start the pointer is blocked on the center of the screen. If I'm lucky i have to chance the USB wirless adapter from port 1 to port 2 but sometimes this trick doesn't work i to use the mouse i have to restart. Like you can see in the productor webpage this mouse don't have the direver but only a tool to solve some problem. Thank you in advance to all the "super-users" that reading this question would be help me Ajax

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• How do I set "MaxPermSize" for Atlassian Fisheye/Crucible running as service on Win2k3?

  - by Jeremy

  I have been trying to setup Atlassian Fisheye/Crucible as a service on Win 2K3 R2 for two weeks. I keep getting various "java.lang.OutOfMemoryError: PermGen space" errors, which crash Fisheye and force me to restart the service. I've followed the example on the Atlassian support site to configure MaxPermSize within the service wrapper. However, when I check SysInfo inside the Fisheye Admin pages and the debug log, I don't see any confirmation. The Java Heap info is in both places, so I'd expect the MaxPermSize setting to show up in both places. The error is persisting and Atlassian support has been little help. I appreciate any help.

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• Cannot ssh anymore into FreeBSD 7.2 home server

  - by Gabi

  Somehow sshd stopped running and no amount of start, restart or onestart will make it go again. I normally ssh into it from a dual-boot laptop computer that shows up on the network as gabi-buntu when running Ubuntu Karmic, and as gabi-pc when running Windows XP Pro. Neither my Putty connection nor the Linux terminal can establish a ssh link anymore. Upon rebooting the server, I am greeted with "/etc/rc: WARNING: run_rc_command: cannot run /usr/sbin/sshd". In addition, a message will appear saying things like rpc.statd: failed to contact host gabi-buntu RPC: port mapper failure RPC: timed out Everything else works fine. The FreeBSD 7.2 box runs a print server, a Samba server, and an Apache server for the home wiki, via https. It also serves up NFS shares for Linux clients. Any suggestions? Thank you, Gabi Huiber

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• MSTSC Not working, disconnects shortly after connecting

  - by F4r-20

  I'm currently having a problem connecting remotely to a server. It is a brand new build Windows 2008 R2, remote users are enabled. I'm trying to connect from a Windows 7 machine. Everytime I remotely connect to the server it will stay connected for a matter of seconds (maybe 3-5) and then disconnect and I get the standard old cannot connect and list of reasons it could be. Then I cannot connect again and get this prompt until I restart the server. As soon as it's finished restarting, it happens all over again. The network and hardware configuration between the two machines is completely reliable. Does anybody know what else I could try? Thanks.

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• inetmgr missing after vista iis7 install

  - by GHarping

  I have installed IIS7 on Vista with all options from Programs and Features->Turn on/off windows features. I have searched for inetmgr accross the whole system with no luck. It is also not present in C:\Windows\System32\inetsrv. The IIS Admin Service is shown as running in the list of all services. Might anyone know what the problem is? My initial problem before this was that after installing IIS and trying to view any arbitrary page via localhost/*filename*, i recieved the error HTTP Error 404.4 - Not Found The resource you are looking for does not have a handler associated with it.

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• Explorer hijacked by a trojan

  - by hsdb

  I managed to catch a newish trojan that my Anti virus program wasn't able to detect. I'm usually not that bad at technical stuff regarding computers but I really don't know what to do with this one anymore. The trojan somehow managed to get my Windows to recover it every time I try to remove it by deleting it's exe (called some weird name located in Programs "asdza/saddasn.exe" (example only)). It also sets an entry in my autostart. It starts a second explorer.exe and tries to connect to some server obviously trying to steal data. (glad I still have my firewall) How can I get rid of this trojan, I really need help. It is new and probably unrecognized by all major virus scanners.

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• Method for imaging a HDD? [closed]

  - by Sonny Ordell

  Possible Duplicate: Imaging new hard drive in Windows 7 laptop? I have to image my 320gb Laptop HDD before I send it in for repairs. The HDD is likely going to get replaced, and I would ideally like to be able to restore everything as I have it now without having to reinstall my OSes, programs and place all my files back again. I can make space on an external HDD I have, so am just looking for how I should go about this. Should I just use dd with a linux rescue cd? Or is there perhaps a more suitable program with its own rescue disk?

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• A simple way to redirect http://mysite.com to http://mysite.com/mylink with Apache?

  - by Bart Silverstrim

  Just starting to try to get the hang of how all the directives and options work under Apache. I'd like to do a redirect with my one site (only running one site on the server) so that when a request comes in to http://mysite.com the server automatically redirects them to a sub-url of http://mysite.com/mylink. I have tried putting redirects into the file located in /etc/apache2/sites-enabled to rewrite this, but then the top level domain URL complains it isn't redirecting properly. I think what I want is a browser redirect, and thought using RewriteEngine On RewriteRule ^/$ /mylink [L,R] would work, but putting it into an .htaccess file didn't work (it redirected but immediately gave a 500 internal server error.) Putting it into the file in /etc/apache2/sites-enabled gives a configuration error when trying to restart Apache. I know it's something simple...but what am I missing?

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• EMC CX3-10c Fault Condition won;t clear

  - by ITGuy24

  We have an old CX3-10c from Dell that had both Standby Power Supplies (SPS) fail. This obviously caused a fault on the system and disabled the cache. We have replaced the SPS's and they test fine as do all other components. Problem is there is still a fault on the "Enclosure SPE [SPE3]" despite all the component in the enclosure showing as good. I was on the line with Dell Gold support for 3 hours yesterday, they have had me restart the SPs multiple times, as well as reseat the power supplies, even shutdown the system completely and power it back on. All to no avail. Fault remains and cache cannot be re-enabled so long as the Fault is present. Any suggestions on clearing this erroneous fault?

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• High level command line program for burning CDs and DVDs?

  - by stickmangumby

  I'm sick of screwing around trying to script a clean solution to burn multiple files and folders to CDs and DVDs with wodim, growisofs and genisoimage. I'm looking for a high level command line program that uses sensible defaults and takes arguments something like this: [program-name] [cd|dvd] /path/to/dir1/ /path/to/dir2/ /path/to/file ... It should then do all the low level copying and ISO generation transparently and just burn the damn disk! Does anyone have any suggestions? I've looked at several programs but it seems there are too many choices to trawl through and not enough information about them online. Thanks :)

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• How to avoid printing nearly blank pages?

  - by joelarson

  How many times have you printed an email just to have the last page be 2 or 3 lines of a person's signature (or worse, the "This is confidential" copy inserted by corporate mailservers)? How many times has the last page contained just the footer of the website? Does anyone know of a utility or print driver that can help avoid printing blank or nearly-blank pages? I am not looking for techniques for avoiding this in specific programs -- if I take the effort of doing print preview and then adjusting the pages to be printed, then of course I can avoid it. What I want something I can install that, whenever I push "Print" to any of the various printers I print to with my laptop, it automatically says "hmmm... I bet he doesn't really want that page which is 95% empty" and possibly prompts me to say "do you really want to waste paper on this?"

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• Automatic switching between "digital output" (HDMI) and built-in speakers in Vista

  - by Laurence Gonsalves

  We occasionally connect my wife's laptop, which runs Vista, to our TV. Whenever we do this we have to manually switch the default audio output to "digital output" for the sound to go through the HDMI connection, and we also have to restart any apps that we want to send sound to the TV. We then have to perform a similar process when disconnecting. Is there any way to just have this be automatic? It seems absurd to have to do so much manual fiddling when a 40 year old transistor radio is "smart" enough to turn off the speakers and send sound to the headphones when headphones are plugged in. In case it helps, the name "RealTek" shows up in the sound card settings dialog.

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• Which converting format of Calibre will keep a MOBI ebook's formatting together?

  - by verve

  I've got a MOBI/Kindle book and I want to convert it to a format that's easy to markup, make notes etc. but when I try to convert to TXT or PDF the result is awful. Are any of the other formats in Calibre's conversion options easily opened on any computer; any of the other formats offered by Calibre fare better after a MOBI conversion? On a side note, are there other programs that will convert a MOBI book better than Calibre? One that will keep the formatting... Win 7. IE 9.

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• How to automatically resume php-fpm?

  - by alfish

  I am using nginx+php-fpm on Debian Squeeze for a busy server and have had great difficulty to deal with maximum connections being reached. Here the problem is that php processes sometimes just die randomly under high load and leave the server with no php process. Then I need to manually restart php5-fpm service to bring back the server to life. I am wondering how to avoid this to happen, or at least treat the symptoms by restarting the php5-fpm automatically whenever there is not php process left to listen to incoming requests. My relevant configs are: pm = dynamic pm.max_children = 1400 pm.start_servers = 10 pm.max_spare_servers = 20 pm.process_idle_timeout = 1s; #not sure it will be useful when pm=dynamic pm.max_requests = 100000 request_terminate_timeout = 30 I appreciate your suggestions to cope with this nasty problem.

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• Where is debian storing its network settings?

  - by user13743

  I have a debian machine that is supposed to have a static ip, but insists on getting its address from the DHCP server. Here's this settings file: $> cat /etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback # The primary network interface allow-hotplug eth0 iface eth0 inet static address 192.168.1.99 gateway 192.168.1.1 netmask 255.255.255.0 network 192.168.1.0 broadcast 192.168.1.255 Yet $> sudo /etc/init.d/networking restart Reconfiguring network interfaces...done. $> sudo ifconfig eth0 Link encap:Ethernet HWaddr 00:e0:03:09:05:2e inet addr:192.168.1.205 Bcast:255.255.255.255 Mask:255.255.255.0 ... Where is it being told to use dhcp?

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• Is it a bad idea to make roaming profile share available offline?

  - by Bryan

  This is regarding a Windows 2008 R2 domain. The Documents, Desktop, Application Data folders are all redirected to users' home directory (mapped as Z:). The users home directory is configured to be offline for mobile users. User profiles are configured as roaming, and located on a separate share (not mapped as a network drive), just accessed via an UNC path. Would it be a good or idea to make the roaming profile share available offline for mobile users using the caching option "All files and programs that users open from the share will be automatically available offline"?

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