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  • how can I estimate the conversion speed (fps) of a video based on CPU power? [closed]

    - by Ahoura Ghotbi
    Atm I am running a video sharing website and I am converting alot of videos. the queue is getting a bit too long (400 videos). I am planning on purchasing a new server and I was wondering if there anyway I can estimate the fps while converting 10 videos at the same time? Regards EXTRA INFO I am using MP4Box (which uses ffmpeg) to handle the encoding etc. Its encoding at 23 CRF, audio bitrate of 96 and audio sampling rate of 44100. The server will have the following processor : Dual Opteron 6272 (2 x 16 cores, 32 cores total) + 128GB RAM.

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  • Solr on Tomcat (Ubuntu OS) installation help

    - by Camran
    I have to install Solr on my Ubuntu Server. However, Solr wont work without Tomcat or another container, and also Java. I have successfully installed tomcat6 and java. BUT, in a tomcat6 guide online, it says I should configure iptables to allow connections via port 8080, which I have done. Then the guide says I can test the tomcat6 by going to: http://my_ip_adress:8080 But this makes the browser just load and wait somehow for a response, and finally display "website not available". I have NO clue how to install Solr with Tomcat. Does anybody know how? How do I know Tomcat6 works? BTW: When I do this: /etc/init.d/tomcat6 start then it says OK. If you need something let me know, I really need help with this one. Thanks UPDATE: When executing this: sudo /etc/init.d/tomcat6 status it respons is Tomcat servlet engine is running with pid 28641

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  • Soap client call has slow performance

    - by Alon_A
    OS is Centos 6.2 with PHP 5.3.15. We have a Facebook application that is using PHP soap web services. We sometimes experince slow preformance when connecting to these services, but we cant understand what exacly is causing the problem. We've try to analyse the behavior using the profiling tool Kcachgrind. Here is a call graph from the index.php page that took 21 seconds to load. You can clearly see that calling the soap client is the bottle neck. I've also noticed that exactly before the page finishes to load, this file is being created in our serve's /tmp folder: wsdl-apache-d1032d85dfd16c0d91a6b70facc70e43 These are the permission of /tmp drwxrwxrwt 6 root root 40960 Aug 30 10:39 tmp I know its not the most specific question, but if any one had similar performance issues with soap client, We would love some ideas about what can cause this kind of performance problem, what can we do to investigate more accurately or how to overcome the problem ? Thanks.

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  • Debian SMB share having permission issues in windows 7

    - by xxpor
    Hi Everyone, I setup a Debian squeeze server with samba. I then shared my /media directory with the following configuration: [media] comment=Hard Drives read only = no locking = no path = /media guest ok = yes browsable = yes directory mask = 0777 When the drives are mapped in Windows 7, the user can write to all of the subdirectories of media (sdb1, sdc1, etc), but cannot write to any folders that they create themselves in the subdirectories of media. For example, if the user mapped /media/sdb1 to Z:, and then creates a folder Z:\test, the folder is created successfully, but no files can be written to Z:\test. If the user ssh's into the server, they have no problems writing to these directories. I have included the screenshots, in order, of what happens on Windows. This samba share is mounted with ntfs-3g, if it makes a difference. Screenshots are here

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  • Syslog message '^@' indicates server crash

    - by user1456214
    The php-cgi's died on a vps I look after and the only syslog entry is this followed by me restarting the VM: ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@Jun 13 22:00:34 VM syslogd 1.5.0#5ubuntu4: restart. Everything before appears to be fine, and there's nothing in the php log even though php timing out was the most obvious symptom (nginx was returning 504s), any ideas how to debug this? Thanks, Jon

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  • Configure firewalld for OpenVPN (server-bridge) in Fedora 20

    - by rsc1975
    I've installed an OpenVPN server (server-bridge) on Fedora 20, but I cannot get it to work. I'm almost sure that It's a firewall issue. I'm trying to connect from an OSX client, but I can connect (just connect to VPN server, without access to anything) before the bridge is configured in server, however once I configure the bridge interface (using this script), then I cannot connect anymore. I've configured it as server-bridge, following these HOW-TOs from Fedora and OpenVPN Ethernet-Bridge. The firewall config is explained using iptables: iptables -A INPUT -i tap0 -j ACCEPT iptables -A INPUT -i br0 -j ACCEPT iptables -A FORWARD -i br0 -j ACCEPT However, in Fedora 20, by default, It's installed firewalld, so, Can anyone tell me the equivalent commands using firewall-cmd ? I read the firewalld guide, but It's not clear to me how to achieve it (I'm a developer, no SysAdmin). I know that I can install iptables, but I want it to work with firewalld.

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  • intermittent SSH with ssh_exchange_identification error

    - by rafamvc
    My ssh connection to my server works every 30 min for around 10 min. Things that I figure out that might be the problem: The server is underload (it is a database server), but on those spare moments that I can connect, it is still under the same load, which doesnt make sense. The server is a ubuntu, and the consolekit was using a lot of virtual memory. Restarted the consolekit and it seems to be using a right amount of memory now. It is not the host alows or deny. Those are setup properly. It is not a firewall problem. Those settings were working and the same settings are working for other similar machines. It is on the ec2. Amazon cloud.

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  • Two IP ranges on eth1 configuration for centos 6.2

    - by Trickzzz
    i have a dedicated server, with "Virtuozzo" on it running VPS's. I have: eth0 - which is configured to the internal network, that one is fine. Now I have: eth1 - which has two ranges routed through this device. x.x.134.x (which has 12 IP's sequentially) x.x.132.x (which has 5) eth1: DEVICE="eth1" HWADDR="00:25:90:37:65:67" NM_CONTROLLED="yes" ONBOOT="yes" IPADDR="x.x.134.x" NETMASK="255.255.255.240" GATEWAY="x.x.134.x" I tried using this with another file as well named "ifcfg-eth1:1" in /etc/sysconfig/network-scripts/ any ideas why the containers on eth1:1 would not link up to the network? Virtuozzo also thinks that eth1:1 is the primary network now, which isn't right?

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  • How to enable/disable authentication without password when executing commands as superuser?

    - by 44taka
    On a Fedora 19 system which I set up for somebody a while ago I noticed that no authentication is required when commands are executed as the superuser. So, for example, when running Yum Extender, configuring the firewall or running some command with sudo in the terminal, I am not asked to provide a password. (With graphical applications the authentication dialog pops up for a few milliseconds.) For better security I would like to disable this automatic (authentication-less) assumption of superuser privileges. I do not remember if or how I enabled this authentication without a password. I might have enabled it for convenience for the non-pro user of this machine, but did not do any "fancy" things (like editing config files) to do so. I did not edit the sudoer file. I just checked that. I might have checked a "Do not ask for password again" checkbox or something similar. Whatever I did, I would like to undo it and enforce authentication for superuser tasks again.

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  • Avoiding memory full -> swap full -> crash

    - by Noam
    I'm experiencing an issue when sometimes the memory gets 100% full, and the swap file also, and the server becomes non-responsive and has to be restarted (causing also problems in database). This is what Cacti shows: The server is running a web-app (database + apache) and during that specific moment didn't experience any ir-regular traffic or usage. This scenario happened twice in the last week. What can cause this? How can I resolve the issue?

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  • What do the "ALL"s in the line " %admin ALL=(ALL) ALL " in Ubuntu's /etc/sudoers file stand for?

    - by sri
    What does each ALL mean? I understand that the whole line indicates that the admin group members get admininstartive privileges, but would like to know more info about the position of the ALLS and if they each refer to a different set of permissions or something like that? $sudo cat /etc/sudoers ... # User privilege Information root ALL=(ALL) ALL #... %sudo ALL=(ALL) ALL # #includedir /etc/sudoers.d #Members of the admin group may gain root privileges %admin ALL=(ALL) ALL # If it matters: OS: Ubuntu : 10.4

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  • Why doesn't my cron.d per minute job run?

    - by Travis Griggs
    I have thrown a bunch of darts trying to get a python script of mine to execute every minute. So I thought I'd simplify it to just do the "simplest thing that could could possibly work" once per minute (I'm running debian/testing). I created a single line file in /etc/cron.d/perminute: * * * * * /bin/touch /home/me/ding_dong It's owned by root, and executable (not sure if either of those matter). And then I did: sudo service cron reload And then sit back and start running ls -ltr again and again in my home directory (/home/me). But my ding_dong file never shows up. I know if I do a sudo /bin/touch /home/me/ding_dong, it shows up right away. Obviously missing something stupid here.

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  • iSCSI logout Input output error

    - by liuzhijun
    203 hava a iSCSI target named poolA that I am trying to log into using this command: iscsiadm -m node -T poolA -p 192.168.0.203 -l I am trying to use it as a vg. Secondly, I create two lvs on this vg, and lastly, I logout: iscsiadm -m node -T poolA -p 192.168.0.203 -u After I execute lvs, the following error occurs: /dev/dm-2: read failed after 0 of 4096 at 0: Input/output error /dev/dm-5: read failed after 0 of 4096 at 0: Input/output error Can I get around this error without a reboot? Thanks!

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  • Clearing terminal

    - by sldkjalsdjk
    Hi folks, I would like to issue a command from a bash script to clear the terminal it is running from: -I don't want to clear the bash history (history -c) -I don't want to issue the clear command (which moves the terminal down to the last prompt, giving the impression the terminal has been cleared, but previous output remains visible if you scroll up) -I want to completely remove all previous output to my terminal and have it clean as if I was opening a new one Thanks.

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  • use ubuntu from a removable drive to work both on laptop and desktop computer

    - by moragos
    my laptop, which i run ubuntu on, is getting a bit old and i find it's getting slower and slower at running applications. My desktop computer is stronger, but I can't give up on the portability of my laptop. I was thinking of installing a HD drawer for both my laptop and desktop. and when I come home just pull the HD from the laptop and plug it into the desktop. I wanted to ask if anyone have tried it or have any inputs on the idea

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  • Installing Debian 7.6.0 on Lenovo Y50

    - by Girauder
    I was trying to install Debian on my new laptop: a Lenovo Y50 64bit running Windows 8. I got together with a friend and installed Debian in his computer first and had no problems. However I've tried to install Debian several times using the AMD64 KDE and netinst versions and accomplished nothing. First try: installed the KDE version. Grub would let me choose which operating system I wanted, but when I selected Debian it would only load the command line. Second try: Reinstalled but this time with the netinst version. I only got a black screen where I could type but nothing else. Third Try. Tried the netinst again. This time after making the partitions I got a message that said that no EFI partition was found. I ignored the message and this time it wouldn't even load Grub. only a command like interface with grub rescue or something. Not once did I get an error during the installation. What am I doing wrong? I assume the problem is I need to make an EFI partition or something like that. So why is it that during the first installations I didn't ask me for that. And if that is indeed the problem, How can I solve it? Update So the installation failed again... as predicted. Here you can find the Disk Management picture. http://postimg.org/image/433cpfkjz/ Please somebody help me. I keep getting the grub rescue thing. secure boot is disabled and legacy support is set first.

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  • How to jump back to the first character in *nix command line?

    - by clami219
    When writing a long command in the *nix command line and having to go back to the first character, in order to add something at the beginning (for instance a nohup, when you realize the process will be a long one, or a sudo, when you realize you need root permissions) it can take a long time for the cursor to make its way back to the first character... Is there a short cut that allows you to jump straight there? I'm using a mac, so Home is not an option

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  • Can I remove the original file while running "sort"?

    - by Spaceman
    I'm sorting a huge file, around 400 gigabytes. I'm running out of the disk space and I must do something quickly. Let's assume the original file is called original_file. So I execute (simplified) it as "sort original_file | gzip -c output_file" I use /home/tmp as a temporary dir. From what I see, there are a lot of intermediate files, like so: tmpA465 tmpB154 ... and so on. The smallest ones have size 12 megabytes. The largest have ~182 megabytes. So, it seems that the "sort" command have already split the original file into small pieces, and have sorted them, and now it is merging them into bigger parts (which will be, eventually, sorted as well). Please correct me if I'm wrong. Can I remove the original file right now without terminating the sort process? I've been waiting for a few days for that and it's important that the "sort" command will not fail and I will get the result file, finally. The OS is Ubuntu server 13.04, x64. Thanks!

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  • Is there good FAT driver for FUSE? (Lightweight, not mountlo)

    - by Vi.
    FUSE filesystem list show some FuseFat and FatFuse. Both are old, FatFuse is read-only , FuseFat is non-buildable and probably depends on glib. Now I'm using mountlo for the task (mounting USB drives in generic way without root access or suid things (except of fusermount itself)), but it looks too big for such task. Using FUSE to mount external storage devices is good both for security and for flexibility reason: the kernel sees only block reads and writes while actual code that deals with filesystem details runs with user privileges, allowing user to use custom filesystems and preventing from kernel filesystem exploits. Is there good vfat FUSE driver?

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  • is there a way to tail a log from remote server without using any user credentials?

    - by suhprano
    I run a script tailing a log in a remote server, like so: ssh userx@someip tail -f /data/current.log|python2.7 monitorlog.py There are dependencies and service requirements that disallows me to run the script off the remote server. (DB, ACLs, and path to another service is uses) Is there a way I can tail and monitor a log without using the ssh userx@someip? I thought about generating RSA keys but I think you still need a user to ssh.

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