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Linux and Unix tutorials for new and seasoned sysadmin

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Tag: wget

How To Install Speedtest-cli On a CentOS / RHEL / Scientific / Fedora Linux To Check Internet Speed

in Categories CentOS, Fedora Linux, Linux, Networking, Python, RedHat and Friends last updated April 28, 2017

I do not want to use Adobe flash based speed testing site due to security concern on my desktop. How do I install Speedtest-cli on a CentOS Linux or Fedora Linux or Red Hat Enterise Linux (RHEL) for checking the Internet speed?

6 Comments

HowTo: Nginx Block User Agent

in Categories Nginx last updated June 27, 2012

How do I block a http user agent or a software agent using Nginx web server under Linux or Unix like operating systems?

10 Comments

Linux Download Password Protected Large ISO Images [ Authentication Credentials ]

in Categories Linux last updated July 28, 2011

I‘m trying to download an ISO image for Enterprise Linux from RHN or Novell Suse. Both providers have placed ISO images behind paywall. I need to provide authentication credentials before downloading all files. How do I download ISO files using the wget command with user name and password?

8 Comments

CentOS / Redhat Linux: Install OpenNTPD To Synchronize The Local Clock

in Categories CentOS, Fedora Linux, Linux, Package Management, RedHat and Friends last updated November 22, 2016

OpenNTPD is a Unix system daemon implementing the Network Time Protocol to synchronize the local clock of a computer system with remote NTP servers. How do I install OpenNTPD under CentOS / RHEL / Fedora Linux instead of default NTPD client / server?

3 Comments

PHP Add Captcha Protection To Web Forms

in Categories Anti Spam, Apache, CentOS, Debian / Ubuntu, Fedora Linux, FreeBSD, Linux, PHP, Programming, RedHat and Friends, Security, Windows last updated September 22, 2009

I own a small business website. However, bots started to abusing my forms such as contact.php. How do I stop bots bots from abusing my site? How do I tell if PHP form is submitted by a person or a script?

26 Comments

OpenBSD Install Ports Tree Collection

in Categories OpenBSD, Package Management, UNIX last updated November 9, 2016

I have installed OpenBSD operating system but ports collection is missing at /usr/ports directory. How do I install ports from ftp / http site under OpenBSD?

5 Comments

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