Networking

Networking: Linux, Apache, htaccess, … , Home and Commercial

Introduction to DNS

June 27, 2016

Domain Name (website name) A domain name is the human-friendly name that we are used to associating with an internet resource (website). For instance, "google.com" is a domain name. The URL "google.com" is associated with the servers owned by Google Inc. The domain name system allows us to reach the Google (website) servers when we type "google.com" into our browsers.   IP Address An...

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mysql: how to update replace all, case insensitive, text substrings

May 6, 2016

in this select statement, SELECT pageid, title, SUBSTRING(contents, POSITION("one two three" IN contents) -0, 13) AS pageContents FROM pagetable WHERE contents LIKE '%one two three%' ; ‘%one two three%’ is case insensitive however, the Position function used to display just that part of "contents" (as pageContents) IS case sensitive and will return the front of the string, not the section you want, if the...

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how to switch from default FTP port in linux

April 20, 2016

updated 2016-07-26 how to change the FTP port (21) in Linux The default port for FTP is # 21. Don’t use FTP.   (use SFTP) It sends usernames and passwords in the clear, which isn’t secure. Instead, look at SFTP which uses the SSH protocol or vsFTPd (Very Secure FTP Deamon) or FTPS or SCP (Secure CoPy). Anonymous FTP Anonymous FTP service: when a...

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How to easily Set Up your Fedora-Linux Home Network

May 19, 2013
How to easily Set Up your Fedora-Linux Home Network

updated 2015-09-20 How To copy and share files between Fedora computers and share a printer How to set up a home network on Fedora 15, 16, 17, 18, 19, 20, 21, 22 (or Ubuntu 9.10 to 11+) with a router. (At the begining of this article, I was still using Fedora 11, 13, and 14 on different pc’s and had live copies of Ubuntu...

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How To automate Linux backups to a remote pc

November 25, 2012

updated 2014-10-09 passwordless ssh: automated Linux shell backups to another computer ssh remote login without a password Accessing a remote site through ssh without a password How to do unattended backups to a remote linux computer Quite often, you want a shell script to ssh into a remote server (your web site?) unattended and do a (regularly scheduled, cron job?) backup, for instance. SSH...

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Internet, Web Site, Security with .htaccess

October 27, 2012

The surest control over security is with /etc/httpd/conf/httpd.conf when you have the entire server, or in .htaccess files otherwise – if you are on shared hosting. Read the post "Unix-Apache .htaccess" for basic information first, if you are not familiar with this. It will be best if you have your site duplicated on your home pc, where you can test out any changes to...

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Unix-Apache .htaccess

September 9, 2012
Unix-Apache .htaccess

hacking, error pages, redirection, time zone, add-on & sub domains & SEO, hot linking – bandwidth stealing. .htaccess files (or "distributed configuration files") allow you to do many different things, … commonly, to have your own custom 404 error pages, to redirect pages, and to enhance security. (for security, see Internet Security Note 1: Unix used .filename extensions before Microsloth Windoze or even DOS...

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how to boot up Fedora (any linux) without password prompting

April 26, 2012

If you always turn on your personal computer and "boot up" in Fedora 11-14 with the same user-id and don’t want the computer stopping at your user-id and password prompt every time, then, open a terminal session and edit /etc/gdm/custom.conf as root. You can insert 2 lines under the heading AutomaticLoginEnable=true AutomaticLogin= Login Window (in any x-window system look around for "Login...

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how to make one of your Fedora pc’s visible on the Internet

December 5, 2011
how to make one of your Fedora pc’s visible on the Internet

How Do I Make my Fedora pc behind my router Visible to the Internet? How to Connect your LAN web server to the Internet If you install the Apache software package on your pc, you can make your pc function like an Internet web site server, create an html page and see it out on the internet – from anywhere. If you have more...

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How to Find Linux CPU Usage

November 29, 2010

To find what is soaking up your cpu How do I Find Unix-Linux CPU Utilization System Monitor on your desktop, you can find all that and more at Applications -> System Tools -> System Monitor. There, you will find each processor, RAM, your operating system, its version, kernel, hard disk space, cpu load averages over the past 1, 5, and 15 minutes, processes running,...

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how to get linux to recognize your modem or router, internet connection

October 26, 2010
how to get linux to recognize your modem or router, internet connection

2009 – 2010 – 2011 How to get Fedora to recognize your internet connection. I installed Fedora and it will not recognize my cat5 (cat5e) ethernet, internet, connection. I installed linux on my pc (Fedora 11, then a year or 2 later, 13, and now fedora 14) and, each time, everything was fine except that Fedora would not communicate with the internet, even-though the...

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help! wireless network not active

October 25, 2010
help! wireless network not active

Laptop with wireless is disabled. unplugged Belkin-n router, and modem, and now the wireless does not work fedora 13: how to "re-enable" wireless NIC ? fedora 13: (re)activate wlan0 "Operation not possible due to RF-kill" fedora 13: "wireless is disabled"; "enable wireless" is grayed out my laptop (Sony Vaio) was networking, communicating with the internet just fine. with or without the CAT5e wire –...

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