skill-tree:use:1:1:b
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| skill-tree:use:1:1:b [2020/07/19 21:16] – lucy | skill-tree:use:1:1:b [2025/11/06 13:30] (current) – external edit 127.0.0.1 | ||
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| - | # USE1.1-B Command Line Interface | + | # USE1.1 Command Line Interface |
| - | # Background | + | |
| HPC systems are usually accessed via a Linux-based Command Line Interface (CLI) that is provided by a shell. | HPC systems are usually accessed via a Linux-based Command Line Interface (CLI) that is provided by a shell. | ||
| At its core, a shell is simply a convenient tool that you can use to execute commands on a Linux computer. | At its core, a shell is simply a convenient tool that you can use to execute commands on a Linux computer. | ||
| The shell provides a textual interface allowing to interact with the operating system and performing all possible operations, i.e., accessing and manipulating files, and running programs. | The shell provides a textual interface allowing to interact with the operating system and performing all possible operations, i.e., accessing and manipulating files, and running programs. | ||
| + | However, there are various misconceptions that new users typically face when handling a shell such as the Bash. | ||
| + | Particularly, | ||
| + | |||
| + | Part of this skill is the general principles of the interaction with a shell, to execute and to stop programs. | ||
| - | Part of this module is the general principles of the interaction with a shell. They are illustrated on the widely available bash shell. | + | ## Requirements |
| - | # Aim | ||
| - | * To describe the key principles of a shell. | ||
| - | * To execute basic programs and manipulate their input/ | ||
| + | ## Learning Outcomes | ||
| - | # Outcomes | + | * Use the bash shell to execute individual programs with arguments. |
| - | | + | * List the set of basic programs and their tasks: |
| - | * Describe the meaning of the exit code of a program. | + | |
| - | * Run multiple programs after another depending on the exit code ;, &&, ||. | + | |
| - | | + | |
| * pwd | * pwd | ||
| + | * ls | ||
| + | * cd | ||
| * whoami | * whoami | ||
| * sleep | * sleep | ||
| Line 25: | Line 26: | ||
| * clear | * clear | ||
| * man | * man | ||
| + | * vi, vim, emacs, nano | ||
| * exit | * exit | ||
| - | | + | |
| - | * Interrupt or abort a program execution: | + | * Demonstrate interrupting or aborting of a program execution using CTRL-C. |
| - | * CTRL-C | + | * Use the available help of a program (--help argument and the man pages). |
| - | * CTRL-Z | + | * Use the shell history to search and execute previously executed commands. |
| - | * using kill -9 | + | * Demonstrate setting and printing shell variables. |
| - | | + | * Show all currently set variables and set as well as unset one manually. |
| - | * Identify potential special characters that must be handled with care. | + | * Identify potential special characters that must be handled with care. |
| - | * Utilize escaping to ensure correct handling of arguments. | + | * List strings that could refer to files/ |
| - | * Understand wildcard characters to select a group of files/ | + | * Utilize escaping to ensure correct handling of arguments. |
| - | * * | + | * Understand wildcard characters to select a group of files/ |
| - | | + | |
| - | * Use text editors, | + | |
| - | # Subskills | ||
skill-tree/use/1/1/b.1595186190.txt.gz · Last modified: 2020/07/19 21:16 by lucy