Differences

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--- skill-tree:use:1:1:b [2020/07/19 21:18] – lucy
+++ skill-tree:use:1:1:b [2025/11/06 13:30] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
-# 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.
 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.
+However, there are various misconceptions that new users typically face when handling a shell such as the Bash.
+Particularly, dealing with control characters and the format expected when executing programs with arguments can be error-prone.
-Part of this module is the general principles of the interaction with a shell. They are illustrated on the widely available bash shell.
+Part of this skill is the general principles of the interaction with a shell, to execute and to stop programs.
-# Aim
+## Requirements
-  * To describe the key principles of a shell.
-  * To execute basic programs and manipulate their input/output.
-# Outcomes
+## Learning Outcomes
-  * Utilize the bash shell to execute individual programs with arguments.
-  * Describe the meaning of the exit code of a program.
+* Use the bash shell to execute individual programs with arguments.
-  * Run multiple programs after another depending on the exit code ;, &&, ||.
+* List the set of basic programs and their tasks:
-  * List the set of basic programs and their tasks:
     * pwd
+    * ls
+    * cd
     * whoami
     * sleep
@@ Line 25: / Line 26: @@
     * clear
     * man
+    * vi, vim, emacs, nano
     * exit
-  * Utilize the available help of a program (--help argument and the man pages).
+    * ...
-  * 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.
-  * Use the shell history to search and execute previously executed commands.
+* 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/directories
-  * Understand wildcard characters to select a group of files/directories:
+* Utilize escaping to ensure correct handling of arguments.
-    * *
+* Understand wildcard characters to select a group of files/directories: "*", "?", "[-,]"
-    * [,-]
-  * Use text editors.
-# Subskills
-  * [[skill-tree:use:1:1:i]]