Frequently Asked Questions About Linux / UNIX » Advanced http://www.cyberciti.biz/faq Every answer asks a more beautiful question. Sat, 25 May 2013 20:12:05 +0000 en-US hourly 1 http://wordpress.org/?v=3.5.1 Nginx: SPDY SSL Installation and Configuration On Debian / Ubuntuhttp://www.cyberciti.biz/faq/debian-ubuntulinux-unix-nginx-server-speeds-up-ssl-with-spdy-support/ http://www.cyberciti.biz/faq/debian-ubuntulinux-unix-nginx-server-speeds-up-ssl-with-spdy-support/#comments Sun, 19 May 2013 15:24:36 +0000 nixCraft http://www.cyberciti.biz/faq/?p=13278 Google Chrome/Chromium, Firefox and Opera browser support SPDY networking protocol. It enables faster browsing on supported sites. SPDY is similar to HTTP, with particular goals to reduce web page load latency and improve web security. SPDY achieves reduced latency through compression, multiplexing, and prioritization. How do I enable nginx SPDY support running on Debian or Ubuntu Linux server?

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]]> http://www.cyberciti.biz/faq/debian-ubuntulinux-unix-nginx-server-speeds-up-ssl-with-spdy-support/feed/ 0 Debian Linux: Upgrade v6.0.x Squeeze to v7.0.0 Wheezyhttp://www.cyberciti.biz/faq/howto-debian-linux-upgrade-6-squeeze-to-7-wheezy/ http://www.cyberciti.biz/faq/howto-debian-linux-upgrade-6-squeeze-to-7-wheezy/#comments Sun, 05 May 2013 19:06:53 +0000 nixCraft http://www.cyberciti.biz/faq/?p=13260 Recently Debian Linux version 7.0 ("Wheezy") released. This version shipped with many new features - improvements to multimedia support, improved security through hardening flags and the OpenStack suite and the Xen Cloud Platform to name a few. How do I upgrades from Debian Linux version 6.x.x (squeeze) to the latest version 7.0.0 wheezy using command line options? How do I upgrade my Debian 6.x server to 7.x over the ssh session?

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]]> http://www.cyberciti.biz/faq/howto-debian-linux-upgrade-6-squeeze-to-7-wheezy/feed/ 3 Linux WARNING: Duplicate VG name server1 LVM2 Error and Solutionhttp://www.cyberciti.biz/faq/warning-duplicate-vg-name-server01-error/ http://www.cyberciti.biz/faq/warning-duplicate-vg-name-server01-error/#comments Sun, 05 May 2013 17:55:14 +0000 nixCraft http://www.cyberciti.biz/faq/?p=13256 I recently added SSD to my home server and reloaded the operating system. However, when I try to access my dm-crypt based old disk, I am getting the following error: Reading all physical volumes. This may take a while... WARNING: Duplicate VG name server01: Existing bc7YA8-eEXt-1aA1-OHTr-zJkA-ucd0-DsbRTc (created here) takes precedence over RIKiar-w3MG-Gzh5-VFWq-bkRT-9IFc-ia8k87 WARNING: Duplicate VG name server01: Existing bc7YA8-eEXt-1aA1-OHTr-zJkA-ucd0-DsbRTc (created here) takes precedence over RIKiar-w3MG-Gzh5-VFWq-bkRT-9IFc-ia8k87 Found volume group "server01" using metadata type lvm2 Found volume group "server01" using metadata type lvm2 The problem is my volume group. I set to to server01 on both old and new hard disk. How can I rename old LVM2? How do I access my old hard disk?

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]]> http://www.cyberciti.biz/faq/warning-duplicate-vg-name-server01-error/feed/ 1 Debian / Ubuntu: Set Port Knocking With Knockd and Iptableshttp://www.cyberciti.biz/faq/debian-ubuntu-linux-iptables-knockd-port-knocking-tutorial/ http://www.cyberciti.biz/faq/debian-ubuntu-linux-iptables-knockd-port-knocking-tutorial/#comments Wed, 01 May 2013 18:51:33 +0000 nixCraft http://www.cyberciti.biz/faq/?p=13252 My iptables based firewall allows only port TCP 80 and 443. I also need tcp port # 22, but I do not have static IP at my home. How do I open and close TCP port #22 on demand under Debian or Ubuntu Linux based server systems? How do I install a port-knock server called knockd and configure it with iptables to open tcp port #22 or any other ports?

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]]> http://www.cyberciti.biz/faq/debian-ubuntu-linux-iptables-knockd-port-knocking-tutorial/feed/ 2 Nginx: Block URL Access (wp-admin/wp-login.php) To All Except One IP Addresshttp://www.cyberciti.biz/faq/nginx-block-url-access-all-except-one-ip-address/ http://www.cyberciti.biz/faq/nginx-block-url-access-all-except-one-ip-address/#comments Sun, 14 Apr 2013 09:07:13 +0000 nixCraft http://www.cyberciti.biz/faq/?p=13220 I am the small business owner and runs my own web-site. I have noticed increased cracking activity against by blog. What's the best way to block WordPress URLs such as example.com/blog/wp-login.php and example.com/blog/wp-admin/ in the nginx web-server?

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]]> http://www.cyberciti.biz/faq/nginx-block-url-access-all-except-one-ip-address/feed/ 0 Linux Iptables Setup Firewall For a Web Serverhttp://www.cyberciti.biz/faq/linux-web-server-firewall-tutorial/ http://www.cyberciti.biz/faq/linux-web-server-firewall-tutorial/#comments Tue, 15 Jan 2013 08:05:06 +0000 nixCraft http://www.cyberciti.biz/faq/?p=13106 I have setup an Apache web server on CentOS Linux. How do I configure firewall to allow or block access? How do I setup firewall for a web server under RHEL or CentOS Linux v6.x?

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]]> http://www.cyberciti.biz/faq/linux-web-server-firewall-tutorial/feed/ 5 Linux Configure Firewall Using Shorewall Under RHEL / CentOShttp://www.cyberciti.biz/faq/centos-rhel-shorewall-firewall-configuration-setup-howto-tutorial/ http://www.cyberciti.biz/faq/centos-rhel-shorewall-firewall-configuration-setup-howto-tutorial/#comments Wed, 19 Dec 2012 20:42:10 +0000 nixCraft http://www.cyberciti.biz/faq/?p=13069 A properly configured firewall can greatly increase the security of RHEL / CentOS based system. How do I configure a shorewall based firewall for CentOS or Red Hat Enterprise Linux system with an Internet connection? How do I install and configure shorewall to protect the following small business network?

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]]> http://www.cyberciti.biz/faq/centos-rhel-shorewall-firewall-configuration-setup-howto-tutorial/feed/ 3 CentOS / RHEL: Install ipset Administration Tool For IP Sets and IPTableshttp://www.cyberciti.biz/faq/centos-rhel-install-ipset-administration-tool-for-ip-sets-and-iptables/ http://www.cyberciti.biz/faq/centos-rhel-install-ipset-administration-tool-for-ip-sets-and-iptables/#comments Mon, 10 Dec 2012 19:36:08 +0000 nixCraft http://www.cyberciti.biz/faq/?p=13039 How do I install the ipset extension to Netfilter/iptables on Red Hat Enterprise Linux / CentOS Linux v6.x?

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]]> http://www.cyberciti.biz/faq/centos-rhel-install-ipset-administration-tool-for-ip-sets-and-iptables/feed/ 1 MySQL Server: Bind To Multiple IP Addresshttp://www.cyberciti.biz/faq/unix-linux-mysqld-server-bind-to-more-than-one-ip-address/ http://www.cyberciti.biz/faq/unix-linux-mysqld-server-bind-to-more-than-one-ip-address/#comments Thu, 06 Dec 2012 07:49:34 +0000 nixCraft http://www.cyberciti.biz/faq/?p=13012 I have MySQL database system running on FreeBSD. The server has multiple ip address. The mysqld used by many websites hosted on two other CentOS based servers. I would like to bind MySQL sever running on Unix / Linux server to more than one IP address such as 202.54.1.2, 202.54.1.10, and 202.54.1.15. How can I bind mysqld to multiple ips?

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]]> http://www.cyberciti.biz/faq/unix-linux-mysqld-server-bind-to-more-than-one-ip-address/feed/ 3 HowTo: Linux Rename a RAID Array From md0 to md2http://www.cyberciti.biz/faq/linux-server-rename-an-mdadm-raid-array/ http://www.cyberciti.biz/faq/linux-server-rename-an-mdadm-raid-array/#comments Tue, 20 Nov 2012 21:08:46 +0000 nixCraft http://www.cyberciti.biz/faq/?p=12941 I am moving a raid array called /dev/md0 from serverA to serverB. On serverB /dev/md0 is already in use. How do I rename a RAID array from /dev/md0 to /dev/md2?

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]]> http://www.cyberciti.biz/faq/linux-server-rename-an-mdadm-raid-array/feed/ 3 Linux View Process Address Spacehttp://www.cyberciti.biz/faq/linux-viewing-process-address-space-command/ http://www.cyberciti.biz/faq/linux-viewing-process-address-space-command/#comments Wed, 31 Oct 2012 20:10:19 +0000 nixCraft http://www.cyberciti.biz/faq/?p=12868 How do I view process address space under Linux operating systems?

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]]> http://www.cyberciti.biz/faq/linux-viewing-process-address-space-command/feed/ 3 Linux FTP Server Traffic Control And Throttle Port 21http://www.cyberciti.biz/faq/linux-traffic-shaping-ftp-server-port-21-22/ http://www.cyberciti.biz/faq/linux-traffic-shaping-ftp-server-port-21-22/#comments Sun, 09 Sep 2012 10:37:56 +0000 nixCraft http://www.cyberciti.biz/faq/?p=12782 I've setup FTP server at port 21 and 40000:41000 as range of passive ftp. How do I control outgoing traffic for the FTP server/service running on my Debian/CentOS/Ubuntu Linux server?

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]]> http://www.cyberciti.biz/faq/linux-traffic-shaping-ftp-server-port-21-22/feed/ 4 Debian / Ubuntu Linux: Install and Configure Shoreline Firewall (Shorewall)http://www.cyberciti.biz/faq/debian-ubuntu-linux-shorewall-firewall-configuration/ http://www.cyberciti.biz/faq/debian-ubuntu-linux-shorewall-firewall-configuration/#comments Fri, 17 Aug 2012 22:04:57 +0000 nixCraft http://www.cyberciti.biz/faq/?p=12707 I know how to setup a firewall under RHEL / Fedora and CentOS Linux quickly. How do I setup a host-based firewall under Debian or Ubuntu Linux server or desktop system? How do I install Shoreline firewall (Shorewall) utility to build firewall based on the Netfilter under Debian or Ubuntu Linux?

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]]> http://www.cyberciti.biz/faq/debian-ubuntu-linux-shorewall-firewall-configuration/feed/ 2 AIX UNIX: Enabling Jumbo Frameshttp://www.cyberciti.biz/faq/howto-ibm-aix-unix-setup-jumbo-frames-for-ethernet/ http://www.cyberciti.biz/faq/howto-ibm-aix-unix-setup-jumbo-frames-for-ethernet/#comments Sun, 14 Mar 2010 12:39:09 +0000 nixCraft http://www.cyberciti.biz/faq/?p=11251 How do I setup jumbo frames under IBM AIX operating systems using command line tools?

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]]> http://www.cyberciti.biz/faq/howto-ibm-aix-unix-setup-jumbo-frames-for-ethernet/feed/ 0 Howto: Linux Add or Remove a Linux Kernel Modules / Drivershttp://www.cyberciti.biz/faq/add-remove-list-linux-kernel-modules/ http://www.cyberciti.biz/faq/add-remove-list-linux-kernel-modules/#comments Wed, 24 Jan 2007 21:40:07 +0000 nixCraft http://www.cyberciti.biz/faq/add-remove-list-linux-kernel-modules/ How do I add or remove hardware device driver (module) from running Linux kernel?

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