Linux - Revision history

Cclark at 00:41, 4 May 2017

2017-05-04T00:41:46Z

Cclark: /* Misc Links */

2015-07-03T15:12:26Z

‎Misc Links

Cclark: /* Misc Links */

2013-03-14T13:33:31Z

‎Misc Links

Cclark at 18:41, 8 March 2013

2013-03-08T18:41:35Z

Cclark: /* Processing Text Files */

2013-02-19T15:37:54Z

‎Processing Text Files

Cclark: /* Processing Text Files */

2013-02-19T15:37:18Z

‎Processing Text Files

Cclark: /* Shell Scripts */

2013-02-19T15:32:38Z

‎Shell Scripts

Cclark: /* Other */

2013-02-19T15:30:38Z

‎Other

Cclark: /* variables */

2013-02-12T15:12:33Z

‎variables

Cclark: /* Shell Scripts */

2013-02-12T15:12:18Z

‎Shell Scripts

@@ Line 1: / Line 1: @@
 ==Misc Links==
 These topics have their own pages.
 [[Gnuplot]]

← Older revision		Revision as of 15:12, 3 July 2015
Line 11:		Line 11:

	[[LaTeX\|Latex]]		[[LaTeX\|Latex]]
		+
		+	[[Power User Tools]]

	==The Command Line==		==The Command Line==

← Older revision		Revision as of 13:33, 14 March 2013
Line 9:		Line 9:

	[http://en.wikibooks.org/wiki/Octave_Programming_Tutorial Octave Tutorial]		[http://en.wikibooks.org/wiki/Octave_Programming_Tutorial Octave Tutorial]
		+
		+	[[LaTeX\|Latex]]

	==The Command Line==		==The Command Line==

@@ Line 1: / Line 1: @@
 ==Misc Links==
 These topics have their own pages.
@@ Line 8: / Line 7: @@
 [[Common C, C++, FORTRAN Libraries]]
 ==The Command Line==

@@ Line 96: / Line 96: @@
 : <code>gawk</code> can be used to re-order columns easily
 : <code>gawk</code> can be used to "transform" columns easily (for example, multiply a column by 2)
-: <code>gawk</code> gawk can be used to do ''much'' more than just print columns from a file. [[Command Line Examples: gawk |here]]
+: <code>gawk</code> gawk can be used to do ''much'' more than just print columns from a file. see a list of examples [[Command Line Examples: gawk |here]]
 ===Pipes===

← Older revision		Revision as of 15:32, 19 February 2013
Line 145:		Line 145:
	</code>		</code>

−	~~====variables====~~	+	See the page on <code>bash</code> shell scripting [[BASH Scripting\|here]] for information on writing scripts.
−	~~Bash supports several "programming" concepts, including variables. However,~~ the ~~syntax for using variables in bash can seem a little strange. When setting variables, use only the variable name~~
−	~~and make sure there is not a space between the variable name and the equal sign. When deferencing a variable, put the variable name in~~ <code>~~${}~~</code>~~. Variable substitution will be performed inside of double~~
−	~~quotes, but not inside of single quotes. Here is an example:~~
−	~~<code>~~
−	~~#! /bin/bash~~
−
−	~~msg="hello world"~~
−
−	~~echo "i am supposed to give you this message: ${msg}" # will print: i am supposed to give you this message: hello world~~
−	~~echo 'i am supposed to give you this message: ${msg}' # will print: i am supposed to give you this message: ${msg}~~
−	~~echo "i am supposed to give you this message: '${msg}'" # will print: i am supposed to give you this message: 'hello world'~~
−	~~echo "i am supposed to give you this message: \"${msg}\"" # will print" i am supposed to give you this message: "hello world"~~
−
−	~~The~~ shell ~~automatically sets several special variables. These special variables <code>${1}, ${2}, ...<code> contain the arguments that were given to your script.~~
−	~~<code>~~
−	~~#! /bin/bash~~
−
−	~~echo "arg 1: $1"~~
−	~~echo "arg 2: $2"~~
−	~~echo "arg 3: $3"~~
−	~~echo "not sure about the rest"~~
−	~~</code>~~
−
−	~~====conditionals (<code>if</code> statements)====~~
−	~~Bash also supports running code "conditionally". This is useful for checking that the correct number of arguments where given to your script, or~~
−
−	~~====Other====~~
−	~~You may (or may not) find some more information on~~ [[BASH Scripting\|~~the scripting page~~]].

← Older revision		Revision as of 15:30, 19 February 2013
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	====Other====		====Other====
−	You may (or may not) find some more information on [[Scripting\|the scripting page]].	+	You may (or may not) find some more information on [[BASH Scripting\|the scripting page]].

@@ Line 167: / Line 167: @@
   echo "arg 3: $3"
   echo "not sure about the rest"
 ====conditionals (<code>if</code> statements)====

@@ Line 159: / Line 159: @@
   echo "i am supposed to give you this message: \"${msg}\""  # will print" i am supposed to give you this message: "hello world"
 ====Other====
 You may (or may not) find some more information on [[Scripting|the scripting page]].