Bash: Reissue And Repeat A Long Command Without Retyping It on a Linux, OS X & Unix

I'm a new Ubuntu Linux user. In Linux, Apple OS X or Unix-like systems, how do I reissue or repeat a long command without retying it?

You need to use the history command to display or manipulate the history list on a Linux or Unix-like systems. This command displays the list of commands previously typed with line numbers, prefixing each modified entry with a *.

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Apple OS X: Install X Window System XQuartz For SSH X11 Forwarding On a Mavericks or Yosemite

need to tunnel X Window securely over SSH bases session so that I run X program on my remote Linux/Unix server/workstation and get back display to my Apple Macbook pro laptop. I tried the ssh -X user@server1 and ssh -Y user@server2 commands on both OS X Mountain Lion and Apple OS X Mavericks/Yosemite. But, I am unable to use the ssh command with X11.

How do I fix this problem on OS X and enable X11 forwarding with ssh command? How do I install XQuartz (X11.app) server on Apple OS X Mountain Lion or Mavericks or Yosemite?

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Mac OS X: Install wget Network Downloader Utility

recently learned that "wget" can continue getting a partially-downloaded (resume download) file. I am unable to find wget command on Mac OS X. How do I install install wget on Mac OS X (Mountain Lion/ Mavericks / Snow Leopard)? How can I install wget in Mac OS X without 3rd-party repo such as Homebrew or MacPorts?

You can install the latest version of GNU/wget and many other open source software without using Homebrew or MacPorts. The steps are as follows:

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