Page Comparison

This page should serve as a reference for the many "things Linux" we use in this course. It is by no means complete – Linux is **huge** – but offers introductions to many important topics.

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• Macs and Linux have a Terminal program built-in
• Windows options:
  • Windows 10+
    • Command Prompt and PowerShell programs have ssh and scp (may require latest Windows updates)
      • Start menu → Search for Command
    • Putty – http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html
      
      • simple Terminal and file copy programs
      • download either the Putty installer or just putty.exe (Terminal) and pscp.exe (secure copy client)
    • Windows Subsystem for Linux – Windows 10 Professional includes a Ubuntu-like bash shells
      • See https://docs.microsoft.com/en-us/windows/wsl/install-win10
      • We recommend the Ubuntu Linux distribution, but any Linux distribution will have an SSH client

Use ssh (secure shell) to login to a remote computers.

# General form:
ssh <user_name>@<full_host_name>

# For example
ssh abattenh@ls6.tacc.utexas.edu

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• Start the text with a single quote or a double quote
  • press Enter when you want to start a new line
  • keep entering text and Enter until you're satisfied
  • supply the matching single quote or a double quote then Enter

  • example:

echo 'My
name is
Anna'

• Use echo -e
  
  • The -e option tells echo to replace some special backslash escapes characters that represent non-printable characters with their associated ASCII codes
    
    • So \n will be replaced by a newline (linefeed) character and \t will be replaced by a Tab.

  • example:

echo -e "My\nname is\nAnna"

heredoc

Another method for writing multi-line text that can be useful for composing a large block of text in a script, is the heredoc syntax, where a block of text is specified between two user-supplied block delimiters, and that text block is sent to a command. The general form of a heredoc is:

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