Command Line Navigation¶
This badge is to learn how to navigate using the command line (CLI).
Commands used when navigating in the CLI:
Navigation requires an understanding of the above commands and of file system paths, both relative and absolute.
Absolute power corrupts absolutely¶
Absolute paths are the full name to a file or directory starting from root.
If I want to navigate to a folder in my Documents folder (on a Mac), the absolute path would look something like:
$ cd /Users/Amanda/Documents/Thesis/
It’s all relative¶
Relative paths are partial path names relative to where you are in the directory structure.
If I am in /Users/Amanda, then the way to get to my Thesis folder using the relative path would look something like:
$ cd Documents/Thesis
If I am in my Thesis folder and I want to move to a different folder within my Documents directory, I would do something like:
$ cd ../IF
The double dot notation is shorthand for “go up a directory,” which is this case is Documents. From there, I can then go down into my IF directory (and play some text adventure games).
Here is a more complicated example: from my IF directory, I could get to a folder of pictures in my Pictures directory (absolute path: /Users/Amanda/Pictures/atlanta) by typing:
$ cd ../../Pictures/atlanta/
The first .. takes me up to Documents, the second .. takes me up to my user directory (Amanda) and from there I can go down into Pictures and then into atlanta.
Open a command line window. Explore your file system in the CLI using the following commands and using absolute and relative path names:
ls means “list” and it will show you the list of files in the directory you are in. Try using some optional arguments such as -a, -p, or -l. What do they show you that just running ls without arguments doesn’t?
pwd means “print working directory,” which is fairly self explainitory. Try typing it in different directories. What does it return?
cd means “change directory,” which is also fairly self explainitory. Try typing in cd by itself. Where does it bring you? Try navigating to a directory within your files system and list the files in that directory. Use absolute and relative paths to visit several different directories on your file system.
Here’s an example of what your CLI screen might look like after completing the above work:
amanda-nyrens-macbook-pro:~ Amanda$ pwd /Users/Amanda amanda-nyrens-macbook-pro:~ Amanda$ ls Calibre Library Documents Icon? Movies Pictures Sites VirtualBox VMs Desktop Downloads Library Music Public Speelies mydir amanda-nyrens-macbook-pro:~ Amanda$ cd Desktop/ amanda-nyrens-macbook-pro:Desktop Amanda$ ls command.txt git-amanda pystar python amanda-nyrens-macbook-pro:Desktop Amanda$ ls -l total 424 -rw-rw-rw- 1 Amanda staff 213063 Jul 27 1999 command.txt drwxr-xr-x 6 Amanda staff 204 Mar 22 16:18 git-amanda drwxr-xr-x 7 Amanda staff 238 Apr 9 09:31 pystar drwxr-xr-x 33 Amanda staff 1122 Apr 9 09:23 python amanda-nyrens-macbook-pro:Desktop Amanda$ cd git-amanda/pystar_amanda/ amanda-nyrens-macbook-pro:pystar_amanda Amanda$ ls -a . .. .DS_Store .git README.rst docs utils web amanda-nyrens-macbook-pro:pystar_amanda Amanda$ pwd /Users/Amanda/Desktop/git-amanda/pystar_amanda amanda-nyrens-macbook-pro:pystar_amanda Amanda$ cd ../../../Documents/Thesis/ amanda-nyrens-macbook-pro:Thesis Amanda$ ls -lrt total 86920 -rwxrwxrwx@ 1 Amanda staff 24576 Oct 4 2005 thesis proposal.doc -rw-r--r--@ 1 Amanda staff 12562780 Feb 15 2006 ES2e-CH18.pdf -rw-rw---- 1 Amanda staff 4197 Mar 8 2006 thesis references-Converted.txt -rw-r--r--@ 1 Amanda staff 3475730 Mar 9 2006 chester_2003.pdf -rw-r--r--@ 1 Amanda staff 908091 Mar 9 2006 evaluating sand and clay models.pdf -rw-r--r--@ 1 Amanda staff 34304 Mar 19 2006 thesis budget.xls -rw-r--r--@ 1 Amanda staff 0 Mar 24 2006 Icon? -rw-r--r--@ 1 Amanda staff 37376 Mar 29 2006 Manuscript preparation WORD.doc -rw-r--r--@ 1 Amanda staff 31744 Mar 29 2006 Remaining Important Dates for Departmental Honors Students 2005-06.doc -rw-r--r--@ 1 Amanda staff 3064448 Apr 9 2006 storti salvini mcclay.pdf -rwxrwxrwx@ 1 Amanda staff 39424 Apr 13 2006 thrust analysis.xls -rw-r--r--@ 1 Amanda staff 9557504 Apr 30 2006 Thesis.doc drwxr-xr-x 38 Amanda staff 1292 Apr 30 2006 Images -rw-r--r--@ 1 Amanda staff 14669824 May 7 2006 thesis.ppt amanda-nyrens-macbook-pro:Thesis Amanda$ pwd /Users/Amanda/Documents/Thesis amanda-nyrens-macbook-pro:Thesis Amanda$
Table Of Contents
- Advice for Organizers
- Safer Space
- Advice for Learners
- Advice for Guides
- Setup Your Machine!
- Pre-Workshop Assessment
- Post-Workshop Assessment
- Previous Pystars
- Notes and Tools
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