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How To Restart Linux NFS Server Properly When Network Become Unavailable
How do I restart NFS server when network link goes down between two servers or NFS client / server under CentOS 4.x / RHEL / CentOS Linux 5.x?Read answer to: "How To Restart Linux NFS Server Properly...
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Linux Restart IMAP Services ( dovecot IMAP server )
How do I restart dovecot IMAP4 / IMAP (Internet Message Access Protocol) under RHEL / CentOS / Fedora / Debian / Ubutnu Linux?Read answer to: "Linux Restart IMAP Services ( dovecot IMAP server )"
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Access Any Remote Server Port Without Modifying Firewall Settings
I've couple of remote servers and I'd like to access few admin only application running on port 10000 and 3001. My firewall only allows port 80, 443, 25, 22 and 110 for public access. Do I need to open...
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Red Hat Enterprise Linux / CentOS Linux Enable EPEL (Extra Packages for...
How do I enable EPEL (Extra Packages for Enterprise Linux) repo and install the packages under RHEL / CentOS Linux server systems?Read answer to: "Red Hat Enterprise Linux / CentOS Linux Enable EPEL...
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SSH Authentication refused: bad ownership or modes for file...
I'm trying to login using ssh keys but server is only allows to login me using a password. The following message is logged into server /var/log/secure file:Feb 25 06:36:50 ns5 sshd[26681]:...
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CentOS / RHEL Configure Yum Automatic Update Retrieval and Installation
The yum command line tool is used to install and update software packages under RHEL / CentOS Linux server. I know how to apply updates using yum update command line, but I'd like to use cron to...
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KSH For Loop Array: Iterate Through Array Values
How do I use ksh for loop to iterate thought array values under UNIX / Linux / BSD operating systems?Read answer to: "KSH For Loop Array: Iterate Through Array Values"
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Linux Disable / Remove All NFS Services
NFS was not designed with security in mind, and has a number of weaknesses, both in terms of the protocol itself and because any NFS installation must expose several daemons, running on both servers...
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BIND DNS: Disable Dynamic Updates
BIND9 dynamic updates allow remote servers to add, delete, or modify any entries in my zone file. How do I disable dynamic updates under BIND 9 (named) for any zone?Read answer to: "BIND DNS: Disable...
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Shutdown Linux Server
How do I shutdown my Linux server or computer using command line options?Read answer to: "Shutdown Linux Server"
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nginx: Send HTTP User Agent Requests To Specific Backend Server
I've tons of images, css and javascript hosted at backend server IP 192.168.1.5 and 192.168.1.6. How do I make sure nginx reverse proxy load balancer always send all http_user_agent requests coming...
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FreeBSD: Atheros AR8131 / AR8132 Gigabit Fast Ethernet Driver Configuration
I have installed FreeBSD 8.x on my Laptop with Windows 7 in dual boot mode. But I'm unable to connect to the LAN or Internet using Atheros AR8132 card. How do I configure this card under FreeBSD?Read...
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Linux: Find Out Which Process Is Listening Upon a Port
How do I find out running processes were associated with each open port? How do I find out what process has open tcp port 111 or udp port 7000 under Linux?Read answer to: "Linux: Find Out Which...
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Iptables Drop IP Address
How do I block particular IP addresses or host with the iptables command under Linux? You need to use the following syntax to drop an IP address or host with the iptables command. WARNING! These...
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PHP: Tags Not Working in PHP 5.3.x under UNIX / Linux
I've recently installed php 5.3.5 in my UNIX box and my old working php code not working. It displays code in pages which is in <? ... my code ... ?> php tags. How do I fix this problem?Read...
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Debian / Ubuntu Linux Disable / Remove All NFS Services
NFS was not designed with security in mind, and has a number of weaknesses, both in terms of the protocol itself and because any NFS installation must expose several daemons, running on both servers...
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Linux Deleting Firewall Rules
I would like to to delete my iptables based firewall rules under Linux. How do I delete rules individually or all at once under CentOS or Fedora Linux or RHEL based servers?Read answer to: "Linux...
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Linux / Unix: scp Copy All Hidden Dot Files
I'm using scp command to copy files from one server to another server. The problem is that I'm unable to copy all hidden files (such as .bash_history). How do I copy hidden files using the scp command...
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FreeBSD: Wake Up Servers Using Wake-on-LAN ( WOL ) Command
I know how to send WOL command using Linux. But, how do I send Wake on LAN (WOL) frames to hosts on a local Ethernet network using FreeBSD operating systems to wake up my servers?Read answer to:...
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Install and Use nmon Tool To Monitor Linux Systems Performance
How do I install nmon command under Linux operating systems to find out performance information for my CPU, memory, network, disk, virtual memory, top process and other part of my HP server running on...
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