Frequently Asked Questions About Linux / UNIX » Hardware http://www.cyberciti.biz/faq Every answer asks a more beautiful question. Fri, 03 Feb 2012 22:38:32 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Linux Find Out CPU Architecture Informationhttp://www.cyberciti.biz/faq/lscpu-command-find-out-cpu-architecture-information/ http://www.cyberciti.biz/faq/lscpu-command-find-out-cpu-architecture-information/#comments Thu, 26 May 2011 23:26:06 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=10594 How do I find out my CPU architecture information under Linux operating systems?]]> http://www.cyberciti.biz/faq/lscpu-command-find-out-cpu-architecture-information/feed/ 11 Linux: Determine the Manufacturer of a PCI Devicehttp://www.cyberciti.biz/faq/linux-find-out-manufacturer-of-pci-device-command/ http://www.cyberciti.biz/faq/linux-find-out-manufacturer-of-pci-device-command/#comments Sun, 24 Apr 2011 22:41:45 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=10394 How do I determine the manufacturer of a PCI device under Linux operating systems?]]> http://www.cyberciti.biz/faq/linux-find-out-manufacturer-of-pci-device-command/feed/ 0 Maximum Number of Disks In RAID 5http://www.cyberciti.biz/faq/maximum-number-of-disks-in-raid-5/ http://www.cyberciti.biz/faq/maximum-number-of-disks-in-raid-5/#comments Sat, 04 Dec 2010 13:05:42 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=9519 Is there a limit to how many drives you can have in one RAID-5? What is the maximum number of physical drives recommended in a RAID-5 set? ]]> http://www.cyberciti.biz/faq/maximum-number-of-disks-in-raid-5/feed/ 2 HowTo Use: Apple USB Keyboard With Linux hid_apple Driverhttp://www.cyberciti.biz/faq/linux-apple-usb-keyboard-driver-installation/ http://www.cyberciti.biz/faq/linux-apple-usb-keyboard-driver-installation/#comments Wed, 16 Jun 2010 09:36:53 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=7891 I've Apple Keyboard with Numeric Keypad and it is not working whenever I connect to my HP laptop. How do I use this keyboard under Debian or any Linux distribution?]]> http://www.cyberciti.biz/faq/linux-apple-usb-keyboard-driver-installation/feed/ 1 Linux Configure Tata Indicom Photon+ Mobile Broadbandhttp://www.cyberciti.biz/faq/howto-configure-tataindicom-mobile-broadband-on-linux/ http://www.cyberciti.biz/faq/howto-configure-tataindicom-mobile-broadband-on-linux/#comments Fri, 04 Dec 2009 07:58:24 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=5918 I've Huawei technologies EC1260 CDMA HSIA USB modem. How do I configure Tata Teleservices "Tata Photon+ Mobile Broadband" Service under Linux operating systems using this modem?]]> http://www.cyberciti.biz/faq/howto-configure-tataindicom-mobile-broadband-on-linux/feed/ 51 HowTo: Upgrade FreeBSD 7.2 To FreeBSD 8 Using csuphttp://www.cyberciti.biz/faq/freebsd-8-upgrade-tutorial/ http://www.cyberciti.biz/faq/freebsd-8-upgrade-tutorial/#comments Mon, 23 Nov 2009 19:27:30 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=5843 How do I upgrade FreeBSD 7.2 to FreeBSD 8 stable using csup source code method including all ports?]]> http://www.cyberciti.biz/faq/freebsd-8-upgrade-tutorial/feed/ 7 Linux MTU Change Sizehttp://www.cyberciti.biz/faq/centos-rhel-redhat-fedora-debian-linux-mtu-size/ http://www.cyberciti.biz/faq/centos-rhel-redhat-fedora-debian-linux-mtu-size/#comments Thu, 22 Oct 2009 08:55:39 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=5471 We've gigabit networks, and large maximum transmission units (MTU) sizes (JumboFrames) can provide better network performance for our HPC environment. How do I change MTU size under Linux?]]> http://www.cyberciti.biz/faq/centos-rhel-redhat-fedora-debian-linux-mtu-size/feed/ 12 CentOS / Redhat: Protect Yum Repo's Packageshttp://www.cyberciti.biz/faq/rhel-centos-fedora-yum-protect-packages-from-certain-repositories/ http://www.cyberciti.biz/faq/rhel-centos-fedora-yum-protect-packages-from-certain-repositories/#comments Mon, 19 Oct 2009 03:00:19 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=5434 How do I protect my yum repo's packages from certain repositories getting replaced / updated via yum command itself under CentOS / RHEL / Redhat Enterprise Linux?]]> http://www.cyberciti.biz/faq/rhel-centos-fedora-yum-protect-packages-from-certain-repositories/feed/ 1 Solaris UNIX Configure Disk Quota For UFS File Systemhttp://www.cyberciti.biz/faq/solaris-unix-disk-quota-tutorial/ http://www.cyberciti.biz/faq/solaris-unix-disk-quota-tutorial/#comments Sat, 29 Aug 2009 08:04:53 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=5119 How do I configure file system quotas to control how much available storage space can be used on a given UFS file system (such as /export/home) under Solaris UNIX operating systems? ]]> http://www.cyberciti.biz/faq/solaris-unix-disk-quota-tutorial/feed/ 2 FreeBSD: Benchmark The Disks Seek And Transfer Performancehttp://www.cyberciti.biz/faq/freebsd-benchmark-measurement-transfer-performance-disk-io/ http://www.cyberciti.biz/faq/freebsd-benchmark-measurement-transfer-performance-disk-io/#comments Sun, 23 Aug 2009 13:54:08 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=4936 How do I perform a simple and rather naive benchmark of the disks seek and transfer performance under FreeBSD operating system? How do I perform a simple measurement of the I/O read command overhead for my RAID-1 array under FreeBSD operating systems?]]> http://www.cyberciti.biz/faq/freebsd-benchmark-measurement-transfer-performance-disk-io/feed/ 0 Linux: Test If My Graphics Card Has OpenGL Support Or Nothttp://www.cyberciti.biz/faq/linux-test-opengl-2d-3d-graphics-card/ http://www.cyberciti.biz/faq/linux-test-opengl-2d-3d-graphics-card/#comments Sun, 23 Aug 2009 13:28:40 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=4930 OpenGL (Open Graphics Library) is a standard specification defining a cross-language, cross-platform API for writing applications that produce 2D and 3D computer graphics. How can I test if my graphics card has OpenGL support under Linux?]]> http://www.cyberciti.biz/faq/linux-test-opengl-2d-3d-graphics-card/feed/ 7 hdparm: HDIO_DRIVE_CMD(identify) Failed: Inappropriate Ioctl For Devicehttp://www.cyberciti.biz/faq/hdiodrive_cmdidentify-failed-inappropriate-ioctl-device/ http://www.cyberciti.biz/faq/hdiodrive_cmdidentify-failed-inappropriate-ioctl-device/#comments Sun, 23 Aug 2009 13:11:32 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=4921 When I run hdparm -tT /dev/sda command under CentOS / RHEL I get the following error on screen:
/dev/sda: Timing buffered disk reads: 908 MB in 3.00 seconds = 302.39 MB/sec HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device

How do I fix this problem?]]> http://www.cyberciti.biz/faq/hdiodrive_cmdidentify-failed-inappropriate-ioctl-device/feed/ 0 DenyHosts: Remove / Delete an IP addresshttp://www.cyberciti.biz/faq/linux-unix-delete-remove-ip-address-that-denyhosts-blocked/ http://www.cyberciti.biz/faq/linux-unix-delete-remove-ip-address-that-denyhosts-blocked/#comments Mon, 17 Aug 2009 20:25:17 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=4844 I've followed your guide and installed denyhosts to protect on my RedHat 5.3 OpenSSH based server. However, I've been accidentally blocked out from my home ADSL IP address. I tried removing my blocked IP from /etc/hosts.deny, but it did blocked it again quickly. It appears that DenyHosts keeps track of the attempts somewhere on disk or memory. How do I remove my own home IP address from DenyHosts?]]> http://www.cyberciti.biz/faq/linux-unix-delete-remove-ip-address-that-denyhosts-blocked/feed/ 9 Adobe Photoshop Alternatives For Linux Desktophttp://www.cyberciti.biz/faq/adobe-photoshop-alternatives-for-linux-desktop/ http://www.cyberciti.biz/faq/adobe-photoshop-alternatives-for-linux-desktop/#comments Thu, 13 Aug 2009 08:56:31 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=4752 I need Photoshop alternative under Ubuntu Linux for basic editing. I know Photoshop can be run using Wine but I'm not able to afford expensive software for just basic editing. Can you suggest a few free FOSS apps that works as alternatives to Photoshop under Ubuntu or Fedora Linux desktop operating systems?]]> http://www.cyberciti.biz/faq/adobe-photoshop-alternatives-for-linux-desktop/feed/ 6 UNIX Get An Alert When Disk Is Fullhttp://www.cyberciti.biz/faq/mac-osx-unix-get-an-alert-when-my-disk-is-full/ http://www.cyberciti.biz/faq/mac-osx-unix-get-an-alert-when-my-disk-is-full/#comments Thu, 13 Aug 2009 08:03:00 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=4745 I want to get an alert when my disk is full under UNIX and Mac OS X? How do I set a a specified threshold and run the script via cron?]]> http://www.cyberciti.biz/faq/mac-osx-unix-get-an-alert-when-my-disk-is-full/feed/ 24 Is Open Source Software Legal To Use For My Business?http://www.cyberciti.biz/faq/is-linux-open-source-software-legal-for-business/ http://www.cyberciti.biz/faq/is-linux-open-source-software-legal-for-business/#comments Fri, 07 Aug 2009 18:57:56 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=4704 I can download and keep using free and open source software (FOSS) on multiple computers. Is this software legal to use for my business? Can you provide some legal information regarding usage of open source software for business which I can share with my boss? ]]> http://www.cyberciti.biz/faq/is-linux-open-source-software-legal-for-business/feed/ 2 How To Setup OpenVZ under RHEL / CentOS Linuxhttp://www.cyberciti.biz/faq/openvz-rhel-centos-linux-tutorial/ http://www.cyberciti.biz/faq/openvz-rhel-centos-linux-tutorial/#comments Thu, 06 Aug 2009 19:19:12 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=4661 Ineed to run more than instance of Linux operating system and different Linux distributions under CentOS. How do I use OpenVZ virtualization to optimize the usage of my Dell servers, and create test Linux VPS running Debian, Ubuntu, and CentOS Linux? How do I deploy OpenVZ under CentOS / RHEL Linux? Read RHEL / CentOS OpenVZ Virtualization Tutorial Series: ]]> http://www.cyberciti.biz/faq/openvz-rhel-centos-linux-tutorial/feed/ 3 Snmpd Listen to Specific IP Address ( BIND To Selected Interfaces )http://www.cyberciti.biz/faq/linux-unix-bind-snmpd-to-specific-ip-address-interfaces/ http://www.cyberciti.biz/faq/linux-unix-bind-snmpd-to-specific-ip-address-interfaces/#comments Thu, 06 Aug 2009 12:54:09 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=4617 How do I force SNMP (Simple Network Management Protocol) network management software to listen on public interfaces under RHEL / RedHat / Fedora / CentOS Linux server?]]> http://www.cyberciti.biz/faq/linux-unix-bind-snmpd-to-specific-ip-address-interfaces/feed/ 6 FreeBSD DHCP Set Hostname ( Empty Hostname After Reboot )http://www.cyberciti.biz/faq/freebsd-problem-with-setting-hostname-using-dhcp/ http://www.cyberciti.biz/faq/freebsd-problem-with-setting-hostname-using-dhcp/#comments Thu, 16 Jul 2009 06:40:59 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=4492 I’m using FreeBSD 7.2 on HP laptop and getting IP info via WI-FI router. I’ve setup hostname in /etc/rc.conf buy after the boot process, I check host name with "hostname" command, but get empty line. Setting hostname with "hostname" works well, but after reboot host name is still empty. I suspect it has something to do with DHCP settings. How do I set hostname-using DHCP?]]> http://www.cyberciti.biz/faq/freebsd-problem-with-setting-hostname-using-dhcp/feed/ 0 Linux Disable Wireless Networking ( Wi-Fi )http://www.cyberciti.biz/faq/linux-remove-wireless-networking-wifi-802-11-support-drivers/ http://www.cyberciti.biz/faq/linux-remove-wireless-networking-wifi-802-11-support-drivers/#comments Fri, 10 Jul 2009 09:00:31 +0000 Vivek Gite http://www.cyberciti.biz/faq/?p=4439 We have over 20+ Dell Precision M6400 laptops pre installed with Red Hat Enterprise Linux version 5.x. I was asked to disable Wi-Fi on all laptops as it poses a serious security risk to our sensitive (classified) systems and networks. How do I disable wireless networking (802.11) under Linux?]]> http://www.cyberciti.biz/faq/linux-remove-wireless-networking-wifi-802-11-support-drivers/feed/ 9