Difference between revisions of "Introduction to Linux in HPC/Text display search"
Introduction to Linux in HPC/Text display search
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m (Remove slide page reference) |
m (Fixed the answer 4 to question no. 2, so that at least one answer is correct.) |
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- <code>command | filename</code> | - <code>command | filename</code> | ||
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− | + <code>command 2> | + | + <code>command > filename 2>&1</code> |
− | || Explanation: The <code> | + | || 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> | </quiz> | ||
{{hidden end}} | {{hidden end}} |
Latest revision as of 09:41, 11 December 2020
Tutorial | |
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Title: | Introduction to Linux in HPC |
Provider: | HPC.NRW
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Contact: | tutorials@hpc.nrw |
Type: | Multi-part video |
Topic Area: | HPC Platforms |
License: | CC-BY-SA |
Syllabus
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1. Background and History | |
2. The Command Line | |
3. Linux Directory Structure | |
4. Files | |
5. Text display and search | |
6. Users and permissions | |
7. Processes | |
8. The vim text editor | |
9. Shell scripting | |
10. Environment variables | |
11. System configuration | |
12. SSH Connections | |
13. SSH: Graphics and File Transfer | |
14. Various tips |
This part of the tutorial introduces the text input and output of the Linux console as well as common text based operations. It explains how different types of in- and output can be handled as well as different ways of text based console commands, their usage and their differences.
Video
Quiz
Exercises in Terminal
1. 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. the best way to predict the future is to invent it – Alan Kay
ExpandAnswer: |