tag:blogger.com,1999:blog-6074822044921090Wed, 28 Aug 2024 12:50:09 +0000LinuxSecurityTips n tricksSysAdminUtilitiesSendmailApacheLinksInterview TipsUbuntuShell ScriptsPostfixCloud computingIPTablesSELinuxSquidMonitoringApache TomcatMySQLSSHNetworkingSolarisBackupFunVSFTPBind DNSDisk ManagementSAMBABashNFSOpenLDAPOpen Source, Open Blog for techies :o) U can taste Linux &amp; Cloud related info here.http://kiranjith83.blogspot.com/noreply@blogger.com (Anonymous)Blogger204125en-usnoOpen Source, Open Blog for techies :o) U can taste Linux &amp; Cloud related info here.Open Source, Open Blog for techies :o) U can taste Linux &amp; Cloud related info here.noreply@blogger.comtag:blogger.com,1999:blog-6074822044921090.post-752359225882140248Tue, 10 Jun 2014 18:27:00 +00002014-06-10T23:57:54.257+05:30 Problem: You don’t trust your Internet connection (public wifi at a café, airport, ..), or perhaps it’s being limited by a firewall (China, your workplace, ..). Sure, many sites offer SSL encryption these days, but many still don’t - and even if they do, others can still see what sites you are contacting. You want to tunnel Firefox/Chrome and other programs through a secure tunnel. http://kiranjith83.blogspot.com/2014/06/how-to-tunnel-everything-through-ssh.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-5515199489188555837Wed, 22 May 2013 11:26:00 +00002013-05-22T17:38:28.227+05:30Bind DNSIPTablesSecurity <!-- .command { padding: 1em; border: 1px dashed #2f6fab; color: black; background-color: #f9f9f9; line-height: 1.1em; font-family: Courier New, Courier, mono; font-size: 12px; font-style: italic; } .system { color: black; font-family: Courier New, Courier, mono; font-size: 12px; font-style: italic; } .highlight { http://kiranjith83.blogspot.com/2013/05/how-to-block-dos-or-limit-traffic-on.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-7548391885091015133Mon, 23 Apr 2012 14:25:00 +00002012-04-23T19:57:20.606+05:30LinuxSysAdminUtilities Found a very useful topic on Linux.com about swap space on Linux. Copying here. Linux divides its physical RAM (random access memory) into chucks of memory called pages. Swapping is the process whereby a page of memory is copied to the preconfigured space on the hard disk, called swap space, to free up that page of memory. The combined sizes of the physical memory and the swap space is thehttp://kiranjith83.blogspot.com/2012/04/swap-space-in-linux.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-2897431472899692738Tue, 20 Mar 2012 08:36:00 +00002012-03-20T14:06:34.091+05:30LinksLinuxTips n tricks Ever needed to completely wipe out critical data off a hard drive? As we all know, mkfs doesn't erase a lot (you already knew this, right?). mkfs and its variants (such as mkfs.ext3 and mke2fs) only get rid of a few important data structures on the filesystem. But the data is still there! For a SCSI disk connected as /dev/sdb, a quick: dd if=/dev/sdb | strings will let anyone recover text datahttp://kiranjith83.blogspot.com/2012/03/wiping-hard-drive.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-201884410896380102Thu, 08 Mar 2012 19:26:00 +00002012-03-09T00:56:47.997+05:30 1.&nbsp;A Complete reference guide 2.&nbsp;Troubleshooting &nbsp; &nbsp;http://kiranjith83.blogspot.com/2012/03/nfs-useful-urls-for-managing.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-7421387206117680540Wed, 14 Dec 2011 07:57:00 +00002011-12-14T13:53:15.333+05:30LinuxSysAdminUtilitiesTips n tricks <!-- .command { padding: 1em; border: 1px dashed #2f6fab; color: black; background-color: #f9f9f9; line-height: 1.1em; font-family: Courier New, Courier, mono; font-size: 12px; font-style: italic; } .system { color: black; font-family: Courier New, Courier, mono; font-size: 12px; font-style: italic; } .highlight { http://kiranjith83.blogspot.com/2011/12/new-features-of-yum-in-rhel-61-now-that.htmlnoreply@blogger.com (Anonymous)1tag:blogger.com,1999:blog-6074822044921090.post-8312591023826227770Tue, 22 Nov 2011 06:58:00 +00002012-03-02T17:14:44.289+05:30LinuxSysAdminUtilitiesTips n tricks <!-- .command { padding: 1em; border: 1px dashed #2f6fab; color: black; background-color: #f9f9f9; line-height: 1.1em; font-family: Courier New, Courier, mono; font-size: 12px; font-style: italic; } .system { color: black; font-family: Courier New, Courier, mono; font-size: 12px; font-style: italic; } .highlight { colorhttp://kiranjith83.blogspot.com/2011/11/linux-filtering-and-transforming-text.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-4968451086838060944Thu, 10 Nov 2011 07:24:00 +00002011-12-14T13:56:20.448+05:30LinuxSecurity <!-- .command { padding: 1em; border: 1px dashed #2f6fab; color: black; background-color: #f9f9f9; line-height: 1.1em; font-family: Courier New, Courier, mono; font-size: 12px; font-style: italic; } .system { color: black; font-family: Courier New, Courier, mono; font-size: 12px; font-style: italic; } .highlight { colorhttp://kiranjith83.blogspot.com/2011/11/password-policy-rules-in-linux.htmlnoreply@blogger.com (Anonymous)5tag:blogger.com,1999:blog-6074822044921090.post-2314054365973425999Wed, 09 Nov 2011 10:12:00 +00002011-11-09T15:43:30.945+05:30LinuxNetworking http://tldp.org/HOWTO/Linux+IPv6-HOWTO/ A better URL explains well. http://kiranjith83.blogspot.com/2011/11/linux-with-ipv6-how-to.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-6753302950739426266Tue, 01 Nov 2011 09:50:00 +00002011-11-01T15:20:30.859+05:30LinuxSecuritySSH http://www.snailbook.com/faq/ All about SSH related issueshttp://kiranjith83.blogspot.com/2011/11/ssh-troubleshooting-and-reference-guide.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-8306673344776324844Tue, 25 Oct 2011 09:43:00 +00002011-10-25T15:13:31.565+05:30LinuxSAMBAA good link explains about SAMBA PDC with LDAP - Click Herehttp://kiranjith83.blogspot.com/2011/10/sambaldap-configuration-rhel5.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-3667603164184105483Mon, 24 Oct 2011 17:12:00 +00002011-10-24T22:42:16.077+05:30LinuxSecuritySSHSysAdminUtilitiesTips n tricks Remote login using the&nbsp;SSH&nbsp;protocol is a frequent activity in today's internet world. With the SSH protocol, the onus is on the SSH client to verify the identity of the host to which it is connecting. The host identify is established by its SSH host key. Typically, the host key is auto-created during initial SSH installation setup. By default, the SSH client verifies the host key http://kiranjith83.blogspot.com/2011/10/how-to-disable-ssh-host-key-checking.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-1251102181540161589Tue, 11 Oct 2011 10:47:00 +00002011-10-11T16:17:41.654+05:30Cloud computing When you think of the beginning of Server Virtualization, companies like VMWare may come to mind. The thing you may not realize is Server Virtualization actually started back in the early 1960’s and was pioneered by companies like General Electric (GE), Bell Labs, and International Business Machines (IBM). The Invention of the Virtual MachineIn the Early 1960’s IBM had a wide range of http://kiranjith83.blogspot.com/2011/10/history-of-virtualization.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-314661482163599344Tue, 11 Oct 2011 09:08:00 +00002011-10-11T14:38:26.395+05:30Cloud computingLinuxUbuntu Grow Your Own Cloud Servers With Ubuntu Have you been wanting to fly to the cloud, to experiment with cloud computing? Now is your chance. With this article, we will step through the process of setting up a private cloud system using Ubuntu Enterprise Cloud (UEC), which is powered by the Eucalyptus platform. The system is made up of one cloud controller (also called a front-end http://kiranjith83.blogspot.com/2011/10/ubuntu-enterprise-cloud-uec-how-to.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-3125163193430411530Thu, 06 Oct 2011 18:26:00 +00002011-10-06T23:56:53.166+05:30LinuxTips n tricksVSFTPIf you are hosting several web sites, for security reason, you may want the webmasters to access their own files only. One of the good way is to give them FTP access by setup of VSFTPD virtual users and directories. This article describes how you can do that easily. (See also: Setup of VSFTPD virtual users – another approach) 1. Installation of VSFTPD For Red Hat, CentOS and Fedora, you may http://kiranjith83.blogspot.com/2011/10/setup-of-vsftpd-virtual-users.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-1185549822702932500Wed, 05 Oct 2011 10:25:00 +00002011-10-05T15:57:58.595+05:30LinuxSecurity The compromise of kernel.org and related machines has made it clear that some developers, at least, have had their systems penetrated. As we seek to secure our infrastructure, it is imperative that nobody falls victim to the belief that it cannot happen to them. We all need to check our systems for intrusions. Here are some helpful hints as proposed by a number of developers on how to http://kiranjith83.blogspot.com/2011/10/hints-on-how-to-check-your-machine-for.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-8503260192093422766Thu, 09 Jun 2011 16:47:00 +00002011-06-09T23:03:23.103+05:30Interview TipsNetworkingSysAdminUtilities Abstract This white paper discusses ICMPv6 and describes the types of ICMPv6 messages. Introducing ICMPv6 Internet Control Message Protocol (ICMP) is communication method for reporting packet-handling errors. ICMP for IPv6 (ICMPv6) is the latest version of ICMP. All IPv6 nodes must conduct ICMPv6 error reporting. ICMPv6 can be used to analyze intranet communication routes and multicast http://kiranjith83.blogspot.com/2011/06/ipv6-chapter-3-icmpv6.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-7220290496053610037Thu, 09 Jun 2011 16:35:00 +00002011-06-09T23:02:18.918+05:30Interview TipsNetworkingTips n tricks Abstract This white paper discusses IPv6 addressing and compares it with IPv4. It outlines the three types of IPv6 address – unicast, multicast, and anycast. It also discusses types of unicast addresses and IEEE 802 addressing. IPv6 addressing Comparing IPv4 and IPv6 addresses IPv4 contains a 32-bit address space, which provides for 2^32 – or 4,294,967,296 – addresses. The IPv6 128-bit http://kiranjith83.blogspot.com/2011/06/ipv6-chapter-2-addressing-architecture.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-7573617197564240520Thu, 09 Jun 2011 16:09:00 +00002011-06-09T23:00:44.580+05:30Interview TipsNetworkingSysAdminUtilitiesTips n tricks IPv6Total of 3.403×10^38 tottal address in IPV6. IPV6 is a new version of the internet protocol, designed as a successor to ipv4. The changes from IPV4 to IPV6 are predominantly in the following areas:Addressing Header Format Flow Extensions and Options Authentication and Privacy 1. The most significant change in the upgrade from IPV4 to IPV6 is the increase in addressing space from 32 bits tohttp://kiranjith83.blogspot.com/2011/06/ipv6-chapter-1-introduction.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-1525536298059604739Fri, 11 Feb 2011 19:56:00 +00002011-02-12T01:26:57.471+05:30ApacheSysAdminUtilitiesTips n trickshttp://www.howtoforge.com/configuring_apache_for_maximum_performancehttp://kiranjith83.blogspot.com/2011/02/apache-tuning-tips.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-4530588399865860628Tue, 08 Feb 2011 17:33:00 +00002011-02-08T23:03:28.847+05:30Interview TipsLinuxTips n tricks <!-- .command { padding: 1em; border: 1px dashed #2f6fab; color: black; background-color: #f9f9f9; line-height: 1.1em; font-family: Courier New, Courier, mono; font-size: 12px; font-style: italic; } .system { color: black; font-family: Courier New, Courier, mono; font-size: 12px; font-style: italic; } .highlight { color:http://kiranjith83.blogspot.com/2011/02/linux-process-tips.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-3801195191982321146Fri, 14 Jan 2011 18:55:00 +00002011-01-26T22:55:48.287+05:30SysAdminUtilitiesTips n tricks <!-- .command { padding: 1em; border: 1px dashed #2f6fab; color: black; background-color: #f9f9f9; line-height: 1.1em; font-family: Courier New, Courier, mono; font-size: 12px; font-style: italic; } .system { color: black; font-family: Courier New, Courier, mono; font-size: 12px; font-style: italic; } .highlight { color:http://kiranjith83.blogspot.com/2011/01/install-packages-via-yum-command-using.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-1316608968835487885Sun, 26 Dec 2010 18:19:00 +00002011-01-26T23:50:26.869+05:30ApacheSecurityUbuntu <!-- .command { padding: 1em; border: 1px dashed #2f6fab; color: black; background-color: #f9f9f9; line-height: 1.1em; font-family: Courier New, Courier, mono; font-size: 12px; font-style: italic; } .system { color: black; font-family: Courier New, Courier, mono; font-size: 12px; font-style: italic; } .highlight { color:http://kiranjith83.blogspot.com/2010/12/installing-and-configuring-modsecurity.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-4951935313074448791Thu, 22 Jul 2010 08:38:00 +00002011-01-27T00:51:42.666+05:30Linux <!-- .command { padding: 1em; border: 1px dashed #2f6fab; color: black; background-color: #f9f9f9; line-height: 1.1em; font-family: Courier New, Courier, mono; font-size: 12px; font-style: italic; } .system { color: black; font-family: Courier New, Courier, mono; font-size: 12px; font-style: italic; } .highlight { color:http://kiranjith83.blogspot.com/2010/07/howto-10-steps-to-configure-tftpboot.htmlnoreply@blogger.com (Anonymous)0tag:blogger.com,1999:blog-6074822044921090.post-335870213093827218Tue, 27 Apr 2010 19:57:00 +00002010-04-28T01:28:47.411+05:30Bashhttp://searchenterpriselinux.techtarget.com/tip/0,289483,sid39_gci1510560,00.html?track=NL-795&amp;ad=763043&amp;asrc=EM_NLN_11432908http://kiranjith83.blogspot.com/2010/04/bash-tip.htmlnoreply@blogger.com (Anonymous)0