C:\>cmd-line.com

"Let's learn the Command-Line Interface!"

GNU Linux (BASH)

open source operating system with advanced command-line interface

GNU Linux (BASH) - Linux Mint [Debian-based distro]
karol@aspireOne:~$ pwd
/home/karol
karol@aspireOne:~$ whatis pwd
pwd (1)              - print name of current/working directory
karol@aspireOne:~$ whatis whatis
whatis (1)           - display one-line manual page descriptions
karol@aspireOne:~$ whatis ls
ls (1)               - list directory contents
karol@aspireOne:~$ ls
Apps  Desktop  Documents  Downloads  Music  Pictures  Public  Templates  Videos
karol@aspireOne:~$ ls -l
total 36
drwxrwxr-x 11 karol karol 4096 Nov 23 19:44 Apps
drwxr-xr-x  5 karol karol 4096 Dec 10 13:29 Desktop
drwxr-xr-x  3 karol karol 4096 Oct 24 15:51 Documents
drwxr-xr-x  3 karol karol 4096 Dec  9 20:13 Downloads
drwxr-xr-x  7 karol karol 4096 Dec  8 08:21 Music
drwxr-xr-x  3 karol karol 4096 Oct 24 13:35 Pictures
drwxr-xr-x  2 karol karol 4096 Oct 24 13:21 Public
drwxr-xr-x  2 karol karol 4096 Oct 24 13:21 Templates
drwxr-xr-x  2 karol karol 4096 Dec  5 21:39 Videos
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Windows command prompt

classic command prompt for the most popular PC operating system

Windows 10 - Command Prompt
C:\Users\Karol>dir
 Volume in drive C is Win10
 Volume Serial Number is 73ED-CC22

 Directory of C:\Users\Karol

29.09.2020  17:59    <DIR>          .
29.09.2020  17:59    <DIR>          ..
30.09.2020  01:04    <DIR>          3D Objects
30.09.2020  01:04    <DIR>          Contacts
30.09.2020  08:47    <DIR>          Desktop
30.10.2020  21:36    <DIR>          Documents
30.09.2020  01:25    <DIR>          Downloads
30.09.2020  01:04    <DIR>          Favorites
30.09.2020  01:04    <DIR>          Links
30.09.2020  01:04    <DIR>          Music
29.09.2020  18:00    <DIR>          OneDrive
30.09.2020  01:04    <DIR>          Pictures
30.09.2020  01:04    <DIR>          Saved Games
30.09.2020  01:04    <DIR>          Searches
30.09.2020  01:04    <DIR>          Videos
               0 File(s)              0 bytes
              15 Dir(s)  85 197 561 856 bytes free

C:\Users\Karol>
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MS-DOS / PC-DOS & FreeDOS

text-based & single-tasking operating system for PC

FreeDOS
  Name           Total           Conventional       Upper Memory                
  --------  ----------------   ----------------   ----------------              
  SYSTEM      16,784   (16K)     10,480   (10K)      6,304    (6K)              
  COMMAND      4,064    (4K)          0    (0K)      4,064    (4K)              
  UDVD2        2,000    (2K)          0    (0K)      2,000    (2K)              
  FDAPM          928    (1K)          0    (0K)        928    (1K)              
  CTMOUSE      3,104    (3K)          0    (0K)      3,104    (3K)              
  SHSUCDX     11,008   (11K)          0    (0K)     11,008   (11K)              
  Free       710,896  (694K)    640,496  (625K)     70,400   (69K)              
  Drives Assigned                                                               
Drive  Driver   Unit                                                            
  D:   FDCD0001   0                                                             
2 drive(s) available.                                                           
                                                                                
Done processing startup files C:\FDCONFIG.SYS and C:\AUTOEXEC.BAT               
                                                                                
Type HELP to get support on commands and navigation.                            
                                                                                
Welcome to the FreeDOS 1.2 operating system (http://www.freedos.org)            
                                                                                
C:\>ver                                                                         
                                                                                
FreeCom version 0.84-pre2 XMS_Swap [Aug 28 2006 00:29:00]                       
C:\>
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PowerShell

object-oriented command interpreter

PowerShell

PS C:\Users\Karol> get-childitem


    Directory: C:\Users\Karol


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
d-r---       30.09.2020     02:04                3D Objects
d-r---       30.09.2020     02:04                Contacts
d-r---       30.09.2020     09:47                Desktop
d-r---       30.10.2020     21:40                Documents
d-r---       30.09.2020     02:25                Downloads
d-r---       30.09.2020     02:04                Favorites
d-r---       30.09.2020     02:04                Links
d-r---       30.09.2020     02:04                Music
d-r---       29.09.2020     19:00                OneDrive
d-r---       30.09.2020     02:04                Pictures
d-r---       30.09.2020     02:04                Saved Games
d-r---       30.09.2020     02:04                Searches
d-r---       30.09.2020     02:04                Videos


PS C:\Users\Karol>
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