linux server

My previous article related to iSCSI storage and NAS storage brought a couple of questions. An interesting question from my mail bag: I’ve 5 Debian Linux servers with HP SAN box. Should I boot from SAN? No, use centralized network storage for shared data or high availability configuration only. Technically you can boot and configure […]

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If your Linux server is opening lots of outgoing network connection, you need to increase local port range. By default range is small. For example squid proxy server can come under fire if it runs out of ports. You can use sysctl command to to modify kernel parameters at runtime. The parameters available are those […]

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This is a reader contributed article. These days almost all server / laptop / desktop system has a gigabit Ethernet card (NIC) pre installed. Most servers are directly connected to internet using 100Mbps connections. You can save real power on your Linux server or desktop by operating at 100Mbps Ethernet speed. For example 1 gigabit […]

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This is a good analysis and sort of demonstration for all new Linux admin. It does shows how to do forensic kind of analysis on a cracked box. A good read for everyone ~ if you want to know how Linux server is cracked and turned into a zombie ;)

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VMware virtualization software is an excllent choice for x86-compatible computers. They have both commercial and free version. I received few email regarding VMWARE on 64 bit Linux. Installing VMWARE server on CentOS 5 or Red hat enterprise Linux 64 bit version is a tricky business. In this small howto I will explain vmware installation on […]

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One of our regular reader hall sends an interesting question: I work for a small company and most user login to centralized Linux server. I’d like to automatically log out all inactive users from server for various reasons. How do I disconnect inactive user sessions? To be frank, I don’t have any clear cut answer […]

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Recently updated/posted Linux and UNIX FAQ (mostly useful to Linux/UNIX new administrators or users) : Update Fedora 7 Linux OpenBSD install BASH shell package Star / Stop FTP server on FreeBSD / OpenBSD How to install Linux / UNIX *.tar.gz tarball files Install Language support in CentOS 5 or Red Hat Enterprise Linux Display or […]

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