Introduction to Linux in HPC/Text display search - Revision history

Martin-leweling-e14f@uni-muenster.de: Fixed the answer 4 to question no. 2, so that at least one answer is correct.

2020-12-11T08:41:38Z

Fixed the answer 4 to question no. 2, so that at least one answer is correct.

2020-12-04T15:22:41Z

Remove slide page reference

2020-12-04T15:21:47Z

Tweak sorting

2020-12-04T15:04:59Z

Fix DISPLAYTITLE

2020-11-27T08:14:03Z

2020-11-27T08:12:25Z

2020-11-27T08:08:56Z

2020-11-27T08:01:38Z

2020-11-23T08:47:54Z

Fit video canvas to 16:9 ratio

2020-11-19T11:00:49Z

Remove unwanted initial line breaks

@@ Line 40: / Line 40: @@
 - <code>command | filename</code>
 ||
-+ <code>command 2>$1 > filename</code>
++ <code>command > filename 2>&1</code>
-|| Explanation: The <code>2>$1</code> operator redirects the error of command into filename which is given after the command <code>></code>. If filename exists already, its contents will be overwritten.
+|| Explanation: The first <code>></code> operator redirects the standard output of command into filename. The second <code>></code> operator redirects the standard error (2) of command into the file descriptor <code>(&)</code> of standard output (1), which in this case is the same as filename. If filename exists already, its contents will be overwritten.
 </quiz>
 {{hidden end}}

@@ Line 61: / Line 61: @@
 {{hidden end}}
-=== Exercises in Terminal (slide 65) === <!--T:5-->
+=== Exercises in Terminal === <!--T:5-->
 . Create a file using cat (some filename) and write some text in it as below. than use grep to find and display the line number and the line with the word Alan in the file.

@@ Line 1: / Line 1: @@
-[[Category:Tutorials]]<nowiki />
+[[Category:Tutorials|Text Display and Search (linux)]]<nowiki />
 {{DISPLAYTITLE:Text Display and Search}}<nowiki />
 {{Syllabus Introduction to Linux}}<nowiki />

@@ Line 1: / Line 1: @@
 [[Category:Tutorials]]<nowiki />
-{{DISPLAYTITLE:<span style="position:absolute; top:-9999px;">Introduction to Linux in HPC/</span>Text display search}}<nowiki />
+{{DISPLAYTITLE:Text Display and Search}}<nowiki />
 {{Syllabus Introduction to Linux}}<nowiki />
 __TOC__

@@ Line 36: / Line 36: @@
 - <code>command > filename</code>
 ||
-+ <code>command 2> filename</code>
+- <code>command 2> filename</code>
 ||
-+ <code>command | filename</code>
+- <code>command | filename</code>
 ||
 + <code>command 2>$1 > filename</code>

@@ Line 29: / Line 29: @@
 {{hidden begin
-|title = 2. How do I find all files containing specific text on Linux? </br>
+|title = 2. Which is the correct way to redirect stdout and stderr to the same file?
 HINT: use  <code>grep</code> command
 }}
@@ Line 44: / Line 61: @@
 {{hidden end}}
 === Exercises in Terminal (slide 65) === <!--T:5-->

@@ Line 3: / Line 3: @@
 {{Syllabus Introduction to Linux}}<nowiki />
 __TOC__
 === Video === <!--T:5-->

@@ Line 6: / Line 6: @@
 === Video === <!--T:5-->
-<youtube width="600" height="400" right>LO1dkFm0GUE</youtube>
+<youtube width="600" height="340" right>LO1dkFm0GUE</youtube>
 ([[Media:HPC.NRW_Introduction_to_Linux_in_HPC_05_Text_Display_and_Search.pdf | Slides as pdf]])