Category: Linux Networking

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inetd Vs xinetd in linux

The inetd daemon The inetd daemon is best described as a super-server, created to manage many daemons or services. It listens to multiple ports, and invokes only requested services. This reduces the load that services place on a system, because it means that network services –...

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Linux Admin Reference – NTP Configuration and Troubleshooting – Red Hat Enterprise Linux :

NTP stands for Network Time Protocol, and it is an Internet protocol used to synchronize the clocks of computers to some time reference. NTP is an Internet standard protocol originally developed by Professor David L. Mills at the University of Delaware. Time usually just advances. If you have communicating programs running on different computers, time still...

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Linux Admin Reference – Chroot FTP Services in Red Hat Enterprise Linux

A chroot on Unix operating systems is an operation that changes the apparent root directory for the current running process and its children. A program that is run in such a modified environment cannot name  and cannot access  files outside the designated directory tree. Chroot sftp...

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Linux Admin Reference – Network Bonding – Redhat Enterprise Linux ( RHEL5 / RHEL6)

  Bonding is a feature that can be enabled bu the Linux kernel, to allow system administrators to combine two or more network interface to form a single, logical “bonded” interface, for redundancy or increased throughput purpose. We can configure Linux bonding in 7 different modes. The behavior of the...

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Linux Admin Reference – Sendmail Issues in Redhat Enterprise Linux

Just discussing some of the common sendmail issues and troubleshooting procedures in linux  Problem: Sendmail can not send mail to users in other domains. Problem: Error log in sendmail.log. Problem:Sendmail rejects connection. Problem:Can not send email via web access client. Problem: Sendmail hangs on boot Problem:...

Linux Administration Information Center

Booting Tasks Read – Unexpected Server Reboots of RHEL servers on HP Read – Linux Admin Reference – RedHat Linux Grub Loader Storage Responsibilities Read – Understand Device Mapper and DM-Multipath Read – Identifying Disk Errors in Linux Read – Identify if linux was installed on...

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Linux Network Troubleshooting

Network connection problems include slow connections, as well as complete loss of connectivity. Factors that may cause slow connectivity include incorrectly configured domain name system (DNS) settings, inefficiently configured routing tables, inferior cabling, overloaded servers, and network congestion. The same set of factors, as well as...

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