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• Why is "googlehosted.com" in the DNS records for our website after signing up for DDOS protection?

  - by Blake Nic

  Recently we had to get some DDOS protection for our website because of the large attacks we were seeing after getting a bit of popularity. We handed over our domain and hosting information to our DDOS protection provider. It worked perfectly but I have a question. On our DNS records we have the Host and Answer and Type. The host has our domain name there. The answer is this: SOMETEXTXXXX.dv.googlehosted.com. And when I copy and paste it into my browser it gives me a 404 error. But our website still loads and functions as it should. I don't understand why it would need this? I asked them about this and they said it is a method for DDOS protection and the other IPs are the reverse proxy (the other IPs give a 404 error too). Can anyone expand on this more please. How does all this tie in together and make the internet browser know where to point the person with all these reverse proxies and stuff I don't understand. Here is an image for reference:

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• Why does Ubuntu gets stuck on the loading screen?

  - by mohit

  I've been experiencing many problem lately since I fresh installed Ubuntu 12.04 LTS on my SONY VAIO VPCEH with Windows 7 previously installed. Sometimes when I try to boot Ubuntu, it gets stuck at loading screen. There seems to be some problem with driver (as far I can judge). Following is the log generated, when I press Esc during the boot (before the problem occurs): ... * Stopping System V initialization compatibility [ok] * Starting System V runlevel compatibility [ok] * Starting crash report submission daemon [ok] * Starting automatic crash report generation [ok] ... ... * Starting LightDM Display Manager [ok] Nothing works after that, no Esc, etc, except restart. Also I've observed the following: Inactivity of Hard-drive (Led doesn't glows). Flashing, or blinking, of Caps-lock and Scroll-lock On restart, Ubuntu seem to load successfully. However, the loading screen has somewhat basic graphics. This problem started after I installed Additional drivers: NVIDIA accelerated graphics driver Also, most of the times Ubuntu loads without any problem. However, it is annoying to restart everytime it fails. So my question is: Why this happens and what is the solution?

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• Why does 'top' say my machine is only 50% idle?

  - by Chris Moore

  What's going on here? I'm running nothing on the system, iotop and iftop show the network and hard drive are both idle, and top (sorted by %CPU) shows nothing running. So why is the system only 50% idle? What's the other 50% waiting for? How can I find out? top - 12:01:05 up 3 days, 15:03, 1 user, load average: 6.00, 6.01, 6.05 Tasks: 179 total, 1 running, 178 sleeping, 0 stopped, 0 zombie Cpu(s): 0.7%us, 0.0%sy, 0.0%ni, 49.7%id, 49.7%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 2053996k total, 1992600k used, 61396k free, 81680k buffers Swap: 4092924k total, 10740k used, 4082184k free, 1338636k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1042 deb 20 0 21468 1412 1000 R 1 0.1 0:00.03 top 1 root 20 0 24188 1952 1152 S 0 0.1 0:01.44 init 2 root 20 0 0 0 0 S 0 0.0 0:00.05 kthreadd Update: dmesg shows the printer driver misbehaving: [28858.561847] cnijnetprn[1503]: segfault at 29 ip 00007f56cf3480f7 sp 00007fffb964ec30 error 4 in libcnnet.so.1.2.0[7f56cf345000+9000] [68851.187802] cnijnetprn[9180]: segfault at 29 ip 00007ffe7636a0f7 sp 00007fff9a8b1990 error 4 in libcnnet.so.1.2.0[7ffe76367000+9000] [155412.107826] cnijnetprn[19966]: segfault at 29 ip 00007fc31de770f7 sp 00007fffc03aa8e0 error 4 in libcnnet.so.1.2.0[7fc31de74000+9000] and also some issue with cp: [248041.172067] INFO: task cp:27488 blocked for more than 120 seconds. [248041.172071] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [248041.172075] cp D ffffffff81805120 0 27488 27345 0x00000004 [248041.172080] ffff880078d57a38 0000000000000046 ffff880078d579d8 ffffffff81032a79 [248041.172085] ffff880078d57fd8 ffff880078d57fd8 ffff880078d57fd8 0000000000012a40 [248041.172090] ffff88007b818000 ffff880069acc560 ffff880078d57a18 ffff88007f8532c0 [248041.172095] Call Trace: [248041.172104] [<ffffffff81032a79>] ? default_spin_lock_flags+0x9/0x10 [248041.172109] [<ffffffff8110a360>] ? __lock_page+0x70/0x70 [248041.172114] [<ffffffff815f0ecf>] schedule+0x3f/0x60 I did try copying something to the USB stick that's plugged into the router and mounted onto this computer using mount.cifs. That almost always causes everything to lock up, so I'm guessing that's the problem. I'll reboot and stop using mount.cifs.

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• Why does apt-get install Skype easily while aptitude complains about MAJOR dependency errors?

  - by Prateek

  I was trying to install Skype on Ubuntu 13.04, from the Canonical repositories. With apt-get it worked easily, while aptitude had a huge problem with dependencies and proposed a complicated solution. Why is this so? Why doesn't aptitude offer whatever apt-get does as a potential solution? Here is the output of both: apt-get install skype: Reading package lists... Building dependency tree... Reading state information... The following extra packages will be installed: gcc-4.7-base:i386 libasound2 libasound2:i386 libasound2-plugins:i386 libasyncns0:i386 libaudio2:i386 libavahi-client3:i386 libavahi-common-data:i386 libavahi-common3:i386 libc6:i386 libcomerr2:i386 libcups2:i386 libdbus-1-3 libdbus-1-3:i386 libdbusmenu-qt2:i386 libdrm-intel1 libdrm-intel1:i386 libdrm-nouveau2 libdrm-nouveau2:i386 libdrm-radeon1 libdrm-radeon1:i386 libdrm2 libdrm2:i386 libexpat1:i386 libffi6:i386 libflac8:i386 libfontconfig1:i386 libfreetype6:i386 libgcc1:i386 libgcrypt11 libgcrypt11:i386 libgl1-mesa-dri libgl1-mesa-dri:i386 libgl1-mesa-glx:i386 libglapi-mesa:i386 libglib2.0-0:i386 libgnutls26 libgnutls26:i386 libgpg-error0:i386 libgssapi-krb5-2:i386 libgstreamer-plugins-base0.10-0:i386 libgstreamer0.10-0:i386 libice6:i386 libjack-jackd2-0:i386 libjbig0:i386 libjpeg-turbo8:i386 libjpeg8:i386 libjson0:i386 libk5crypto3:i386 libkeyutils1:i386 libkrb5-3:i386 libkrb5support0:i386 liblcms1:i386 libllvm3.2:i386 liblzma5:i386 libmng1:i386 libmysqlclient18:i386 libogg0:i386 liborc-0.4-0:i386 libp11-kit0:i386 libpciaccess0:i386 libpcre3:i386 libpng12-0:i386 libpulse0:i386 libqt4-dbus libqt4-dbus:i386 libqt4-declarative libqt4-declarative:i386 libqt4-designer libqt4-help libqt4-network libqt4-network:i386 libqt4-opengl libqt4-opengl:i386 libqt4-script libqt4-script:i386 libqt4-scripttools libqt4-sql libqt4-sql:i386 libqt4-sql-mysql:i386 libqt4-sql-sqlite libqt4-svg libqt4-test libqt4-xml libqt4-xml:i386 libqt4-xmlpatterns libqt4-xmlpatterns:i386 libqtcore4 libqtcore4:i386 libqtgui4 libqtgui4:i386 libqtwebkit4:i386 libsamplerate0:i386 libselinux1:i386 libsm6:i386 libsndfile1:i386 libspeexdsp1:i386 libsqlite3-0:i386 libssl1.0.0 libssl1.0.0:i386 libstdc++6:i386 libtasn1-3:i386 libtiff5 libtiff5:i386 libtxc-dxtn-s2tc0:i386 libuuid1:i386 libvorbis0a:i386 libvorbisenc2:i386 libwrap0:i386 libx11-6 libx11-6:i386 libx11-xcb1 libx11-xcb1:i386 libxau6:i386 libxcb-dri2-0 libxcb-dri2-0:i386 libxcb-glx0 libxcb-glx0:i386 libxcb1 libxcb1:i386 libxdamage1:i386 libxdmcp6:i386 libxext6 libxext6:i386 libxfixes3 libxfixes3:i386 libxi6 libxi6:i386 libxml2 libxml2:i386 libxrender1 libxrender1:i386 libxslt1.1:i386 libxss1:i386 libxt6 libxt6:i386 libxv1 libxv1:i386 libxxf86vm1 libxxf86vm1:i386 mysql-common qdbus skype-bin:i386 sni-qt:i386 zlib1g:i386 Suggested packages: nas:i386 glibc-doc:i386 locales:i386 rng-tools rng-tools:i386 libglide3 libglide3:i386 gnutls-bin gnutls-bin:i386 krb5-doc:i386 krb5-user:i386 libvisual-0.4-plugins:i386 gstreamer-codec-install:i386 gnome-codec-install:i386 gstreamer0.10-tools:i386 gstreamer0.10-plugins-base:i386 jackd2:i386 liblcms-utils:i386 pulseaudio:i386 libqt4-declarative-folderlistmodel libqt4-declarative-gestures libqt4-declarative-particles libqt4-declarative-shaders qt4-qmlviewer libqt4-declarative-folderlistmodel:i386 libqt4-declarative-gestures:i386 libqt4-declarative-particles:i386 libqt4-declarative-shaders:i386 qt4-qmlviewer:i386 libqt4-dev libqt4-dev:i386 libthai0:i386 libicu48:i386 qt4-qtconfig qt4-qtconfig:i386 Recommended packages: libtxc-dxtn0:i386 xml-core:i386 The following NEW packages will be installed gcc-4.7-base:i386 libasound2:i386 libasound2-plugins:i386 libasyncns0:i386 libaudio2:i386 libavahi-client3:i386 libavahi-common-data:i386 libavahi-common3:i386 libc6:i386 libcomerr2:i386 libcups2:i386 libdbus-1-3:i386 libdbusmenu-qt2:i386 libdrm-intel1:i386 libdrm-nouveau2:i386 libdrm-radeon1:i386 libdrm2:i386 libexpat1:i386 libffi6:i386 libflac8:i386 libfontconfig1:i386 libfreetype6:i386 libgcc1:i386 libgcrypt11:i386 libgl1-mesa-dri:i386 libgl1-mesa-glx:i386 libglapi-mesa:i386 libglib2.0-0:i386 libgnutls26:i386 libgpg-error0:i386 libgssapi-krb5-2:i386 libgstreamer-plugins-base0.10-0:i386 libgstreamer0.10-0:i386 libice6:i386 libjack-jackd2-0:i386 libjbig0:i386 libjpeg-turbo8:i386 libjpeg8:i386 libjson0:i386 libk5crypto3:i386 libkeyutils1:i386 libkrb5-3:i386 libkrb5support0:i386 liblcms1:i386 libllvm3.2:i386 liblzma5:i386 libmng1:i386 libmysqlclient18:i386 libogg0:i386 liborc-0.4-0:i386 libp11-kit0:i386 libpciaccess0:i386 libpcre3:i386 libpng12-0:i386 libpulse0:i386 libqt4-dbus:i386 libqt4-declarative:i386 libqt4-network:i386 libqt4-opengl:i386 libqt4-script:i386 libqt4-sql:i386 libqt4-sql-mysql:i386 libqt4-xml:i386 libqt4-xmlpatterns:i386 libqtcore4:i386 libqtgui4:i386 libqtwebkit4:i386 libsamplerate0:i386 libselinux1:i386 libsm6:i386 libsndfile1:i386 libspeexdsp1:i386 libsqlite3-0:i386 libssl1.0.0:i386 libstdc++6:i386 libtasn1-3:i386 libtiff5:i386 libtxc-dxtn-s2tc0:i386 libuuid1:i386 libvorbis0a:i386 libvorbisenc2:i386 libwrap0:i386 libx11-6:i386 libx11-xcb1:i386 libxau6:i386 libxcb-dri2-0:i386 libxcb-glx0:i386 libxcb1:i386 libxdamage1:i386 libxdmcp6:i386 libxext6:i386 libxfixes3:i386 libxi6:i386 libxml2:i386 libxrender1:i386 libxslt1.1:i386 libxss1:i386 libxt6:i386 libxv1:i386 libxxf86vm1:i386 mysql-common skype skype-bin:i386 sni-qt:i386 zlib1g:i386 The following packages will be upgraded: libasound2 libdbus-1-3 libdrm-intel1 libdrm-nouveau2 libdrm-radeon1 libdrm2 libgcrypt11 libgl1-mesa-dri libgnutls26 libqt4-dbus libqt4-declarative libqt4-designer libqt4-help libqt4-network libqt4-opengl libqt4-script libqt4-scripttools libqt4-sql libqt4-sql-sqlite libqt4-svg libqt4-test libqt4-xml libqt4-xmlpatterns libqtcore4 libqtgui4 libssl1.0.0 libtiff5 libx11-6 libx11-xcb1 libxcb-dri2-0 libxcb-glx0 libxcb1 libxext6 libxfixes3 libxi6 libxml2 libxrender1 libxt6 libxv1 libxxf86vm1 qdbus 41 upgraded, 105 newly installed, 0 to remove and 138 not upgraded. Need to get 85.9 MB/89.2 MB of archives. After this operation, 204 MB of additional disk space will be used. Do you want to continue [Y/n]? aptitude install skype: Reading package lists... Building dependency tree... Reading state information... Reading extended state information... Initialising package states... The following NEW packages will be installed: gcc-4.7-base:i386{a} libasound2:i386{a} libasound2-plugins:i386{a} libasyncns0:i386{a} libaudio2:i386{a} libavahi-client3:i386{a} libavahi-common-data:i386{a} libavahi-common3:i386{a} libc6:i386{a} libcomerr2:i386{a} libcups2:i386{a} libdbus-1-3:i386{a} libdbusmenu-qt2:i386{a} libdrm-intel1:i386{a} libdrm-nouveau2:i386{a} libdrm-radeon1:i386{a} libdrm2:i386{a} libexpat1:i386{a} libffi6:i386{a} libflac8:i386{a} libfontconfig1:i386{a} libfreetype6:i386{a} libgcc1:i386{a} libgcrypt11:i386{a} libgl1-mesa-dri:i386{a} libgl1-mesa-glx:i386{a} libglapi-mesa:i386{a} libglib2.0-0:i386{a} libgnutls26:i386{a} libgpg-error0:i386{a} libgssapi-krb5-2:i386{a} libgstreamer-plugins-base0.10-0:i386{a} libgstreamer0.10-0:i386{a} libice6:i386{a} libjack-jackd2-0:i386{a} libjbig0:i386{a} libjpeg-turbo8:i386{a} libjpeg8:i386{a} libjson0:i386{a} libk5crypto3:i386{a} libkeyutils1:i386{a} libkrb5-3:i386{a} libkrb5support0:i386{a} liblcms1:i386{a} libllvm3.2:i386{a} liblzma5:i386{a} libmng1:i386{a} libmysqlclient18:i386{a} libogg0:i386{a} liborc-0.4-0:i386{a} libp11-kit0:i386{a} libpciaccess0:i386{a} libpcre3:i386{a} libpng12-0:i386{a} libpulse0:i386{a} libqt4-dbus:i386{a} libqt4-declarative:i386{a} libqt4-network:i386{a} libqt4-opengl:i386{a} libqt4-script:i386{a} libqt4-sql:i386{a} libqt4-sql-mysql:i386{a} libqt4-xml:i386{a} libqt4-xmlpatterns:i386{a} libqtcore4:i386{a} libqtgui4:i386{a} libqtwebkit4:i386{a} libsamplerate0:i386{a} libselinux1:i386{a} libsm6:i386{a} libsndfile1:i386{a} libspeexdsp1:i386{a} libsqlite3-0:i386{a} libssl1.0.0:i386{a} libstdc++6:i386{a} libtasn1-3:i386{a} libtiff5:i386{a} libtxc-dxtn-s2tc0:i386{a} libuuid1:i386{a} libvorbis0a:i386{a} libvorbisenc2:i386{a} libwrap0:i386{a} libx11-6:i386{a} libx11-xcb1:i386{a} libxau6:i386{a} libxcb-dri2-0:i386{a} libxcb-glx0:i386{a} libxcb1:i386{a} libxdamage1:i386{a} libxdmcp6:i386{a} libxext6:i386{a} libxfixes3:i386{a} libxi6:i386{a} libxml2:i386{a} libxrender1:i386{a} libxslt1.1:i386{a} libxss1:i386{a} libxt6:i386{a} libxv1:i386{a} libxxf86vm1:i386{a} mysql-common{a} skype skype-bin:i386{a} sni-qt:i386{a} zlib1g:i386{a} The following packages will be upgraded: libasound2 libdbus-1-3 libdrm-intel1 libdrm-nouveau2 libdrm-radeon1 libdrm2 libgcrypt11 libgl1-mesa-dri libgnutls26 libqt4-dbus libqt4-declarative libqt4-network libqt4-opengl libqt4-script libqt4-sql libqt4-xml libqt4-xmlpatterns libqtcore4 libqtgui4 libssl1.0.0 libtiff5 libx11-6 libx11-xcb1 libxcb-dri2-0 libxcb-glx0 libxcb1 libxext6 libxfixes3 libxi6 libxml2 libxrender1 libxt6 libxv1 libxxf86vm1 qdbus 35 packages upgraded, 105 newly installed, 0 to remove and 144 not upgraded. Need to get 81.7 MB/85.0 MB of archives. After unpacking 204 MB will be used. The following packages have unmet dependencies: libqt4-test : Depends: libqtcore4 (= 4:4.8.4+dfsg-0ubuntu9) but 4:4.8.4+dfsg-0ubuntu9.2 is to be installed. libqt4-designer : Depends: libqt4-script (= 4:4.8.4+dfsg-0ubuntu9) but 4:4.8.4+dfsg-0ubuntu9.2 is to be installed. Depends: libqt4-xml (= 4:4.8.4+dfsg-0ubuntu9) but 4:4.8.4+dfsg-0ubuntu9.2 is to be installed. Depends: libqtcore4 (= 4:4.8.4+dfsg-0ubuntu9) but 4:4.8.4+dfsg-0ubuntu9.2 is to be installed. Depends: libqtgui4 (= 4:4.8.4+dfsg-0ubuntu9) but 4:4.8.4+dfsg-0ubuntu9.2 is to be installed. libqt4-sql-sqlite : Depends: libqt4-sql (= 4:4.8.4+dfsg-0ubuntu9) but 4:4.8.4+dfsg-0ubuntu9.2 is to be installed. Depends: libqtcore4 (= 4:4.8.4+dfsg-0ubuntu9) but 4:4.8.4+dfsg-0ubuntu9.2 is to be installed. libqt4-help : Depends: libqt4-network (= 4:4.8.4+dfsg-0ubuntu9) but 4:4.8.4+dfsg-0ubuntu9.2 is to be installed. Depends: libqt4-sql (= 4:4.8.4+dfsg-0ubuntu9) but 4:4.8.4+dfsg-0ubuntu9.2 is to be installed. Depends: libqtcore4 (= 4:4.8.4+dfsg-0ubuntu9) but 4:4.8.4+dfsg-0ubuntu9.2 is to be installed. Depends: libqtgui4 (= 4:4.8.4+dfsg-0ubuntu9) but 4:4.8.4+dfsg-0ubuntu9.2 is to be installed. libqt4-svg : Depends: libqtcore4 (= 4:4.8.4+dfsg-0ubuntu9) but 4:4.8.4+dfsg-0ubuntu9.2 is to be installed. Depends: libqtgui4 (= 4:4.8.4+dfsg-0ubuntu9) but 4:4.8.4+dfsg-0ubuntu9.2 is to be installed. libqt4-scripttools : Depends: libqt4-script (= 4:4.8.4+dfsg-0ubuntu9) but 4:4.8.4+dfsg-0ubuntu9.2 is to be installed. Depends: libqtcore4 (= 4:4.8.4+dfsg-0ubuntu9) but 4:4.8.4+dfsg-0ubuntu9.2 is to be installed. Depends: libqtgui4 (= 4:4.8.4+dfsg-0ubuntu9) but 4:4.8.4+dfsg-0ubuntu9.2 is to be installed. The following actions will resolve these dependencies: Remove the following packages: 1) account-plugin-aim 2) account-plugin-facebook 3) account-plugin-flickr 4) account-plugin-generic-oauth 5) account-plugin-google 6) account-plugin-jabber 7) account-plugin-salut 8) account-plugin-twitter 9) account-plugin-windows-live 10) account-plugin-yahoo 11) empathy 12) friends 13) friends-dispatcher 14) friends-facebook 15) friends-twitter 16) gir1.2-signon-1.0 17) gnome-control-center-signon 18) libaccount-plugin-1.0-0 19) libfriends0 20) libqt4-designer 21) libqt4-help 22) libqt4-scripttools 23) libqt4-sql-sqlite 24) libqt4-svg 25) libqt4-test 26) libsignon-glib1 27) mcp-account-manager-uoa 28) nautilus-sendto-empathy 29) python-qt4 30) shotwell 31) signon-plugin-oauth2 32) signon-plugin-password 33) signon-ui 34) signond 35) ubuntu-sso-client-qt 36) ubuntuone-control-panel-qt 37) unity-lens-friends 38) unity-lens-photos 39) unity-scope-gdrive 40) webaccounts-extension-common 41) xul-ext-webaccounts Leave the following dependencies unresolved: 42) mcp-account-manager-uoa recommends gnome-control-center-signon 43) mcp-account-manager-uoa recommends account-plugin-aim 44) mcp-account-manager-uoa recommends account-plugin-jabber 45) mcp-account-manager-uoa recommends account-plugin-google 46) mcp-account-manager-uoa recommends account-plugin-facebook 47) mcp-account-manager-uoa recommends account-plugin-windows-live 48) mcp-account-manager-uoa recommends account-plugin-yahoo 49) mcp-account-manager-uoa recommends account-plugin-salut 50) ubuntu-desktop recommends empathy 51) ubuntu-desktop recommends libqt4-sql-sqlite 52) ubuntu-desktop recommends shotwell 53) ubuntu-desktop recommends ubuntuone-control-panel-qt 54) ubuntu-desktop recommends xul-ext-webaccounts 55) unity recommends unity-lens-photos 56) unity recommends unity-lens-friends 57) unity-lens-files recommends unity-scope-gdrive 58) libqt4-sql recommends libqt4-sql-mysql | libqt4-sql-odbc | libqt4-sql-ps Accept this solution? [Y/n/q/?] And in case this helps, aptitude show skype: Package: skype State: not installed Version: 4.2.0.11-0ubuntu0.12.04.2 Priority: extra Section: net Maintainer: Steve Langasek <[email protected]> Architecture: amd64 Uncompressed Size: 62.5 k Depends: skype-bin Conflicts: skype Description: client for Skype VOIP and instant messaging service Skype is software that enables the world's conversations. Millions of individuals and businesses use Skype to make free video and voice calls, send instant messages and share files with other Skype users. Every day, people also use Skype to make low-cost calls to landlines and mobiles. * Make free Skype-to-Skype calls to anyone else, anywhere in the world. * Call to landlines and mobiles at great rates. * Group chat with up to 200 people or conference call with up to 25 others. * Free to download.

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• Why the recent shift to removing/omitting semicolons from Javascript?

  - by Jonathan

  It seems to be fashionable recently to omit semicolons from Javascript. There was a blog post a few years ago emphasising that in Javascript, semicolons are optional and the gist of the post seemed to be that you shouldn't bother with them because they're unnecessary. The post, widely cited, doesn't give any compelling reasons not to use them, just that leaving them out has few side-effects. Even GitHub has jumped on the no-semicolon bandwagon, requiring their omission in any internally-developed code, and a recent commit to the zepto.js project by its maintainer has removed all semicolons from the codebase. His chief justifications were: it's a matter of preference for his team; less typing Are there other good reasons to leave them out? Frankly I can see no reason to omit them, and certainly no reason to go back over code to erase them. It also goes against (years of) recommended practice, which I don't really buy the "cargo cult" argument for. So, why all the recent semicolon-hate? Is there a shortage looming? Or is this just the latest Javascript fad?

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• Why don't %MEM values add up to mem in top?

  - by ben

  I'm currently debugging performance issues with my VPS and for that I'm trying to understand which of the processes eat the most memory. Reading top, here's what I get: Mem: 366544k total, 321396k used, 45148k free, 380k buffers Swap: 1048572k total, 592388k used, 456184k free, 7756k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 12339 ruby 20 0 844m 74m 2440 S 0 20.8 0:24.84 ruby 12363 ruby 20 0 844m 73m 1576 S 0 20.6 0:00.26 ruby 21117 ruby 20 0 171m 33m 1792 S 0 9.3 2:03.98 ruby 11846 ruby 20 0 858m 21m 1820 S 0 6.0 0:09.15 ruby 21277 ruby 20 0 219m 11m 1648 S 0 3.2 2:00.98 ruby 792 root 20 0 266m 10m 1024 S 0 3.0 1:40.06 ruby 532 mysql 20 0 234m 4760 1040 S 0 1.3 0:41.58 mysqld 793 root 20 0 250m 4616 984 S 0 1.3 1:20.55 ruby 586 root 20 0 156m 4532 848 S 0 1.2 6:17.10 god 12315 ruby 20 0 175m 2412 1900 S 0 0.7 0:07.55 ruby 3844 root 20 0 44036 2132 1028 S 0 0.6 1:08.22 ruby 10939 ruby 20 0 179m 1884 1724 S 0 0.5 0:08.33 ruby 4660 ruby 20 0 229m 1592 1440 S 0 0.4 2:55.46 ruby 3879 nobody 20 0 37428 964 520 S 0 0.3 0:01.99 nginx As you can see my memory is about 90% used (which is my issue) but when you add up the %MEM values, it goes to about 50-60% only. Same thing, RES doesn't add up to ~350mb. Why? Am I misunderstanding their meaning? Thanks

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• Why would an IE8 in a desktop has a 'Tablet PC 2.0' in its user-agent string?

  - by ultrajohn

  I am just curious, why would a windows 7 desktop, installed with ie8, have Tablet PC 2.0 in its user agent string. Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; Tablet PC 2.0) Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; Tablet PC 2.0) Is this a feature in Windows 7, how can I turn this off in IE8? Other browsers on the same computer don't have such string in the user-agent string they send. As a result, one of our web application confuses this particular desktop client as a mobile (because of the tablet), hence returns the mobile version of our website to it. Thank you!

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• App installed in ~/usr launches from terminal but not Applications menu (or why does setting ld_library_path in .profile not work as it should)

  - by levesque

  I have built and installed an application under a directory of my choosing, let's say under /home/jim/usr, so files have been put in three-four folders, all under this $HOME/usr folder (e.g., bin, include, lib, share, etc.). I can launch this application from the command line just fine as I added the proper paths to my environement variables PATH and LD_LIBRARY_PATH in ~/.bashrc. I added the same paths to the ~/.profile file, which, if I'm not mistaken, is supposed to be parsed by Ubuntu. Doesn't work. Nothing. Where can I go from there? EDIT: I logged out/in and restarted my computer. Both didn't change a thing. The problem seems to come from the fact that no matter what I do the LD_LIBRARY_PATH environment variable is not properly passed to Ubuntu. Using log files, I found that the application I'm trying to run in this example doesn't find one it's dependencies located in ~/usr/lib. One solution would be to add the /home/jim/usr/lib folder inside a file located in /etc/ld.so.conf.d/, but I don't have admin rights on this machine. Making a wrapper script like this one works: #!/bin/bash export LD_LIBRARY_PATH=$HLOC/usr/lib application &> $HOME/application_messages.log but that would force me to wrap all my home compiled applications with this script. Any ideas? Why does Ubuntu/Gnome remove the LD_LIBRARY_PATH environment variable from my set variables? Is it because trying to do this is bad practice? UPDATE (and solution): As found by Christopher, there is a bug report about this on launchpad. LD_LIBRARY_PATH is unset after parsing of the ~/.profile file. See the bug report. Seems the only solution for now is to make a wrapper script.

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• OS X is based on the codex Gigas the devils bible: Android OS n 4.4 Dio Ra Egyptian deity why is that?

  - by user215250

  GUESS WHO? The Internet and all computers are based on a mathematical number system that seems to be 3, 4, 6, 8 and 10. The HTTP is 888P and UTF-8 and Windows 8 and 8 gigas of RAM(88) on a 64biTOS X-10 or Aten(satan) why is it allowed to be so evil and who all knows about it? Is this activity illegal and should I sew these companies for being involved in satanic practices? iC3 iC3 iC3 I do see XP (X) Chi and (P) Rho a monogram and symbol for Christ, consisting of the superimposed Greek letters. The X is ten, The X code, OS X(O Satan) and codex The Gigas the Devil bible and the P is Payne, The House of Payne in which God dwells. Windows 8, Google Android and Apples OS X are the foundation on which we operarte on the Internet and our Mobiles devices. What is it that these 3 companies have chosen to base their OS’s on such evil? Windows 8 is windows hate H8, HH and H8. Said to be the Devil. Google’s (UGLE) M the Masonic M behind Android OS.in 4.4 is Dio (R) DNA O Sin and 44 is the Devils name in Twain’s The Mysterious Stranger. Apple’s evil (i) OS X (ou-es-ten) O Satan them all beat (B8) considering Apple put their first product on the market for $666.66. The Holy Grail of computers they say. Your Excellency, Lord and King OS2 Eisus Uni Peg Unix: The Unicorn Pegasus Jesus Christ

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• Why Wouldn't Root Be Able to Change a Zone's IP Address in Oracle Solaris 11?

  - by rickramsey

  You might assume that if you have root access to an Oracle Solaris zone, you'd be able to change the root's IP address. If so, you'd proceed along these lines ... First, you'd log in: root@global_zone:~# zlogin user-zone Then you'd remove the IP interface: root@user-zone:~# ipadm delete-ip vnic0 Next, you'd create a new IP interface: root@user-zone:~# ipadm create-ip vnic0 Then you'd assign the IP interface a new IP address (10.0.0.10): root@user-zone:~# ipadm create-addr -a local=10.0.0.10/24 vnic0/v4 ipadm: cannot create address: Permission denied Why would that happen? Here are some potential reasons: You're in the wrong zone Nobody bothered to tell you that you were fired last week. The sysadmin for the global zone (probably your ex-girlfriend) enabled link protection mode on the zone with this sweet little command: root@global_zone:~# dladm set-linkprop -p \ protection=mac-nospoof,restricted,ip-nospoof vnic0 How'd your ex-girlfriend learn to do that? By reading this article: Securing a Cloud-Based Data Center with Oracle Solaris 11 by Orgad Kimchi, Ron Larson, and Richard Friedman When you build a private cloud, you need to protect sensitive data not only while it's in storage, but also during transmission between servers and clients, and when it's being used by an application. When a project is completed, the cloud must securely delete sensitive data and make sure the original data is kept secure. These are just some of the many security precautions a sysadmin needs to take to secure data in a cloud infrastructure. Orgad, Ron, and Richard and explain the rest and show you how to employ the security features in Oracle Solaris 11 to protect your cloud infrastructure. Part 2 of a three-part article on cloud deployments that use the Oracle Solaris Remote Lab as a case study. About the Photograph That's the fence separating a small group of tourist cabins from a pasture in the small town of Tropic, Utah. Follow Rick on: Personal Blog | Personal Twitter | Oracle Forums   Follow OTN Garage on: Web | Facebook | Twitter | YouTube

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• Why don't I have a loop error with these redirects?

  - by byronyasgur

  I know this may seem a bit of a question in reverse, but I actually don't seem to have a problem I just want to make sure before I proceed. I have 2 domains domain1.com and domain2.com and a directory my_directory at domain2.com. I have domain2.com setup as an "add on domain" in the cpanel account of domain1.com so that when I go to domain2.com I am taken to domain1.com/my_directory but the browser shows domain2.com in the addressbar so it looks and acts like and is a separate site. However when people browse to domain1.com/directory I want the address bar to show domain2.com not domain1.com/directory. So I put a redirect in the htaccess file to redirect domain1.com/directory to domain2.com and it works perfectly, but I think it shouldnt and I'm worried I've done something wrong. My question is this: domain2.com was already redirected to domain1.com/directory in the first place (I see the redirect in my cpanel under addon domains) so by adding the second redirect in the htaccess file I should be creating a loop! Could somebody please set my mind at rest and show me why not?

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• Variables in static library are never initialized. Why?

  - by Coyote

  I have a bunch of variables that should be initialized then my game launches, but must of them are never initialized. Here is an example of the code: MyClass.h class MyClass : public BaseObject { DECLARE_CLASS_RTTI(MyClass, BaseObject); ... }; MyClass.cpp REGISTER_CLASS(MyClass) Where REGISTER_CLASS is a macro defined as follow #define REGISTER_CLASS(className)\ class __registryItem##className : public __registryItemBase {\ virtual className* Alloc(){ return NEW className(); }\ virtual BaseObject::RTTI& GetRTTI(){ return className::RTTI; }\ }\ \ const __registryItem##className __registeredItem##className(#className); and __registryItemBase looks like this: class __registryItemBase { __registryItemBase(const _string name):mName(name){ ClassRegistry::Register(this); } const _string mName; virtual BaseObject* Alloc() = 0; virtual BaseObject::RTTI& GetRTTI() = 0; } Now the code is similar to what I currently have and what I have works flawlessly, all the registered classes are registered to a ClassManager before main(...) is called. I'm able to instantiate and configure components from scripts and auto-register them to the right system etc... The problem arrises when I create a static library (currently for the iPhone, but I fear it will happen with android as well). In that case the code in the .cpp files is never registered. Why is the resulting code not executed when it is in the library while the same code in the program's binary is always executed? Bonus questions: For this to work in the static library, what should I do? Is there something I am missing? Do I need to pass a flag when building the lib? Should I create another structure and init all the __registeredItem##className using that structure?

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• Why are bugs responsible for big deficiencies in functionality given such low priority?

  - by keepitsimpleengineer

  Well, first of all, change is inevitable and mostly good. Furthermore attempts at simplifying the User Interface such as Gnome 3, Unity to make Linux more inclusive hold much promise, even though they adversely affect my style of working. Additionally, though now retired, I have worked with computers for 47 years, and though I do nothing serious for others now, I still do heavy duty things. 10.04 LTS is my big workstation, and I had three 10.10 systems for Mythtv, and one of which is further adapted for video & related. The Mythtv were 10.10 because of a dormant bug regarding installing to 10.04. My work habits consistently use dual monitors and compiz cube and 3D windows with the computing horsepower to support them. The dual monitors with separate X screens has been not been functional since 11.04, and cube/3D windows not functional in Unity, and with diminished functionality Gnome. There is a bug filed (after upgrade to 12.04 amd64 Gnome Classic not properly draw second screen) I have mitigated the situation some by switching to Xubuntu and eschewing Unity. The question that comes to mind is why this bug is not given more attention in that it nearly cuts functionality in half for more competent workstations. Sample workspace... Please know that I appreciate all the hard work, dedication require to pull off something as big as Ubuntu et al.

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• Why is Ubuntu offline (except torrents) while Windows is online?

  - by Fahim al Islam

  I am using a static wired connection. Everything was perfect. But suddenly from few hours back I can't access any website. Dropbox, Ubuntu One also can't connect. Ping request is also unsuccessful, but I can download through torrent. I am not trying torrent download and browsing at the same time. So, I think it's not an issue about torrent using all the bandwidth. One important point is that this connection works perfectly on Windows on this same PC (My PC is dual-boot). I have tried the way what izx has suggested (using "sudo sh -c 'echo nameserver 8.8.8.8 /etc/resolv.conf'"), but I'm facing the same problem again. Now I can't even ping 8.8.8.8 and google.com. Though I can ping 74.125.228.2 (which is Google IP address) I can't understand what's happening and why this is happening. I'm new in this website many rules and regulations is unknown to me. So, please don't be bothered for my mistakes. Looking forward for help from anyone. Thanks to all.

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• Do you keep your ideas secret? and why?

  - by MainMa

  I believe any programmer has several ideas that she/he considers as innovative or at least valuable. It may be an idea of a new product which will make this world better or a new development approach, etc. But a great idea must be implemented and promoted/advertised. This requires a lot of work (proofs of concept, prototypes, technology previews, etc.) and a lot of money (appropriate advertisement, marketing, etc.). So months later, the idea stays in our heads, but nothing else is done, because it's difficult, long and expensive, sometimes even impossible for a single developer. On the other hand, it would be painful to share our ideas, and see a medium-size company which has enough resources making something useful from it and having success and money. So what do you do with your ideas you can hardly implement or patent? Do you talk freely about them in discussion boards and with other developers? Do you keep them like a precious thing without never talking about them to anybody? If you keep your ideas, why are you doing so? Is it just because you hope that one day, you will be able to implement them and have a huge success, while you know very well by experience that it's an utopia?

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• Why is there no facility to overload static properties in PHP?

  - by Jon

  Intro PHP allows you to overload method calls and property accesses by declaring magic methods in classes. This enables code such as: class Foo { public function __get($name) { return 42; } } $foo = new Foo; echo $foo->missingProperty; // prints "42" Apart from overloading instance properties and methods, since PHP 5.3.0 we can also overload static methods calls by overriding the magic method __callStatic. Something missing What is conspicuously missing from the available functionality is the ability to overload static properties, for example: echo Foo::$missingProperty; // fatal error: access to undeclared static property This limitation is clearly documented: Property overloading only works in object context. These magic methods will not be triggered in static context. Therefore these methods should not be declared static. As of PHP 5.3.0, a warning is issued if one of the magic overloading methods is declared static. But why? My questions are: Is there a technical reason that this functionality is not currently supported? Or perhaps a (shudder) political reason? Have there been any aborted attempts to add this functionality in the past? Most importantly, the question is not "how can I have dynamic static properties in userland PHP?". That said, if you know of an especially cute implementation based on __callStatic that you want to share then by all means do so.

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• Why do programmers write closed source applications and then make them free? [closed]

  - by Ken

  As an entrepreneur/programmer who makes a good living from writing and selling software, I'm dumbfounded as to why developers write applications and then put them up on the Internet for free. You've found yourself in one of the most lucrative fields in the world. A business with 99% profit margin, where you have no physical product but can name your price; a business where you can ship a buggy product and the customer will still buy it. Occasionally some of our software will get a free competitor, and I think, this guy is crazy. He could be making a good living off of this but instead chose to make it free. Do you not like giant piles of money? Are you not confident that people would pay for it? Are you afraid of having to support it? It's bad for the business of programming because now customers expect to be able to find a free solution to every problem. (I see tweets like "is there any good FREE software for XYZ? or do I need to pay $20 for that".) It's also bad for customers because the free solutions eventually break (because of a new OS or what have you) and since it's free, the developer has no reason to fix it. Customers end up with free but stale software that no longer works and never gets updated. Customer cries. Developer still working day job cries in their cubicle. What gives? PS: I'm not looking to start an open-source/software should be free kind of debate. I'm talking about when developers make a closed source application and make it free.

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• Why create a Huffman tree per character instead of a Node?

  - by Omega

  For a school assignment we're supposed to make a Java implementation of a compressor/decompresser using Huffman's algorithm. I've been reading a bit about it, specially this C++ tutorial: http://www.cprogramming.com/tutorial/computersciencetheory/huffman.html In my program, I've been thinking about having Nodes that have the following properties: Total Frequency Character (if a leaf) Right child (if any) Left child (if any) Parent (if any) So when building the Huffman tree, it is just a matter of linking a node to others, etc. However, I'm a bit confused with the following quote (emphasis mine): First, every letter starts off as part of its own tree and the trees are ordered by the frequency of the letters in the original string. Then the two least-frequently used letters are combined into a single tree, and the frequency of that tree is set to be the combined frequency of the two trees that it links together. My question: why should I create a tree per letter, instead of just a node per letter and then do the linking later? I have not begun coding, I'm just studying the algorithm first, so I guess I'm missing an important detail. What is it?

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• Why is my fresh install of 12.04 running slow?

  - by user75129

  Hey guys I'm a new linux user, I figured it would be the best for the laptop I just purchased because it's said to be faster than Windows 7. I'm currently dual-booting with Windows 7 Professial and Ubuntu 12.04. The laptop I am using is the LG X Note P210 Specs: Intel Core i5 470UM Dual Core clocked at 1.33GHz 12.5" HD LED LCD Screen at 1366 by 768 4GB DDR3 @ 1333 MHz RAM Integrated Intel HD Graphics Card 4 Cell Battery with 3150mAh It comes loaded Windows 7 Home Premium 64-Bit, it runs fine on that but my Ubuntu 12.04 runs slower than it and I don't understand why, it definitely has decent specs to run even a 64-bit operating system and do some gaming. Granted I know it's not the best but for a laptop it does the job so Ubuntu should work especially since it's said to make older units with worse specs run even better. I'm not all that familiar with coding and all so what are things I can do to optimize speed without overclocking? Boot up is fine, its program response time I believe, once Im in the actual OS, it lags, slows down, apps stop working, take forever to load up apps.

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• Why the clip space in OpenGL has 4 dimensions?

  - by user827992

  I will use this as a generic reference, but the more i browser online docs and books, the less i understand about this. const float vertexPositions[] = { 0.75f, 0.75f, 0.0f, 1.0f, 0.75f, -0.75f, 0.0f, 1.0f, -0.75f, -0.75f, 0.0f, 1.0f, }; in this online book there is an example about how to draw the first and classic hello world for OpenGL about making a triangle. The vertex structure for the triangle is declared as stated in the code above. The book, as all the other sources about this, stress the point that the Clip Space is a 4D structure that is used to basically decide what will be rasterized and rendered to the screen. Here I have my questions: i can't imagine something in 4D, i don't think that a human can do that, what is a 4D for this Clip space ? the most human-readable doc that i have read speaks about a camera, which is just an abstraction over the clipping concept, and i get that, the problem is, why not using the concept of a camera in the first place which is a more familiar 3D structure? The only problem with the concept of a camera is that you need to define the prospective in other way and so you basically have to add another statement about what kind of camera you wish to have. How i'm supposed to read this 0.75f, 0.75f, 0.0f, 1.0f ? All i get is that they are all float values and i get the meaning of the first 3 values, what does it mean the last one?

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• Why does working processors harder use more electrical power?

  - by GazTheDestroyer

  Back in the mists of time when I started coding, at least as far as I'm aware, processors all used a fixed amount of power. There was no such thing as a processor being "idle". These days there are all sorts of technologies for reducing power usage when the processor is not very busy, mostly by dynamically reducing the clock rate. My question is why does running at a lower clock rate use less power? My mental picture of a processor is of a reference voltage (say 5V) representing a binary 1, and 0V representing 0. Therefore I tend to think of of a constant 5V being applied across the entire chip, with the various logic gates disconnecting this voltage when "off", meaning a constant amount of power is being used. The rate at which these gates are turned on and off seems to have no relation to the power used. I have no doubt this is a hopelessly naive picture, but I am no electrical engineer. Can someone explain what's really going on with frequency scaling, and how it saves power. Are there any other ways that a processor uses more or less power depending on state? eg Does it use more power if more gates are open? How are mobile / low power processors different from their desktop cousins? Are they just simpler (less transistors?), or is there some other fundamental design difference?

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• What is logical cohesion, and why is it bad or undesirable?

  - by Matt Fenwick

  From the c2wiki page on coupling & cohesion: Cohesion (interdependency within module) strength/level names : (from worse to better, high cohesion is good) Coincidental Cohesion : (Worst) Module elements are unrelated Logical Cohesion : Elements perform similar activities as selected from outside module, i.e. by a flag that selects operation to perform (see also CommandObject). i.e. body of function is one huge if-else/switch on operation flag Temporal Cohesion : operations related only by general time performed (i.e. initialization() or FatalErrorShutdown?()) Procedural Cohesion : Elements involved in different but sequential activities, each on different data (usually could be trivially split into multiple modules along linear sequence boundaries) Communicational Cohesion : unrelated operations except need same data or input Sequential Cohesion : operations on same data in significant order; output from one function is input to next (pipeline) Informational Cohesion: a module performs a number of actions, each with its own entry point, with independent code for each action, all performed on the same data structure. Essentially an implementation of an abstract data type. i.e. define structure of sales_region_table and its operators: init_table(), update_table(), print_table() Functional Cohesion : all elements contribute to a single, well-defined task, i.e. a function that performs exactly one operation get_engine_temperature(), add_sales_tax() (emphasis mine). I don't fully understand the definition of logical cohesion. My questions are: what is logical cohesion? Why does it get such a bad rap (2nd worst kind of cohesion)?

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• Could someone explain why my world reconstructed from depth position is incorrect?

  - by yuumei

  I am attempting to reconstruct the world position in the fragment shader from a depth texture. I pass in the 8 frustum points in world space and interpolate them across fragments and then interpolate from near to far by the depth: highp float depth = (2.0 * CameraPlanes.x) / (CameraPlanes.y + CameraPlanes.x - texture( depthTexture, textureCoord ).x * (CameraPlanes.y - CameraPlanes.x)); // Reconstruct the world position from the linear depth highp vec3 world = mix( nearWorldPos, farWorldPos, depth ); CameraPlanes.x is the near plane CameraPlanes.y is the far. Assuming that my frustum positions are correct, and my depth looks correct, why is my world position wrong? (My depth texture is of format GL_DEPTH_COMPONENT32F if that matters) Thanks! :D Update: Screenshot of world position http://imgur.com/sSlHd So you can see it looks nearly correct. However as the camera moves, the colours (positions) change, which they shouldnt. I can get this to work, if I do the following: Write this into the depth attachment in the previous pass: gl_FragDepth = gl_FragCoord.z / gl_FragCoord.w / CameraPlanes.y; and then read the depth texture like so: depth = texture( depthTexture, textureCoord ).x However this will kill the hardware z buffer optimizations.

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• Why did the web win the space of remote applications and X not?

  - by Martin Josefsson

  The X Window System is 25 years old, it had it's birthday yesterday (on the 15'th). As you probably are aware of, one of it's most important features is the separation of the server side and the client side in a way that neither Microsoft's, Apples or Wayland's windowing systems have. Back in the days (sorry for the ambiguous phrasing) many believed X would dominate over other ways to make windows because of this separation of server and client, allowing the application to be ran on a server somewhere else while the user clicks and types on her own computer at home. This use obviously still exists, but is marginalized at best. When we write and use programs that run on a server we almost always use the web with it's html/css/js. Why did the web win, and X not? The technologies used for the web (said html/css/js) are a mess. Combined with all the back-end-frameworks (Rails, Django and all) it really is a jungle to navigate thru. Still the web thrives with creativity and progress, while remote X apps do not.

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• Why is CS never a topic of conversation of the layman? [closed]

  - by hydroparadise

  Granted, every profession has it's technicalities. If you are an MD, you better know the anatomy of the human body, and if you are astronomer, you better know your calculus. Yet, you don't have to know these more advance topics to know that smoking might give you lung cancer because of carcinogens or the moon revolves around the earth because of gravity (thank you Discovery Channel). There's sort of a common knowledge (at least in more developed countries) of these more advanced topics. With that said, why are things like recursive descent parsing, BNF, or Turing machines hardly ever mentioned outsided 3000 or 4000 level classes in a university setting or between colleagues? Even back in my days before college in my pursuit of knowledge on how computers work, these very important topics (IMHO) never seem to get the light of day. Many different sources and sites go into "What is a processor?" or "What is RAM?", or "What is an OS?". You might get lucky and discover something about programming languages and how they play a role in how applications are created, but nothing about the tools for creating the language itself. To extend this idea, Dennis Ritchie died shortly after Steve Jobs, yet Dennis Ritchie got very little press compared to Steve Jobs. So, the heart of my question: Does the public in general not care to hear about computer science topics that make the technology in their lives work, or does the computer science community not lend itself to the general public to close the knowledge gap? Am I wrong to think the general public has the same thirst for knowledge on how things work as I do? Please consider the question carefully before answering or vote closing please.

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