Yes. Just about everything to do with Linux on the command line is case sensitive, including commands and file names.
All unix commands are case sensitive.
Yes.
You can view the history of commands entered on a Linux system with the history command.
The history command displays all commands that have been entered into the terminal.
Yes they are case sensitive.. :-)
You can easily cycle through previously entered commands by pressing the Up key.
Innumerable. Remember that any program on Linux can be launched from the command line, so there are as many commands as there are programs.
The 'man' or the 'info' command have documentation about utilities and commands in the system.
the command 'cd ~' will get you there .
No, but the grand majority of them do. For more information: $ man command $ command --help
su command is used to change the user.
You get a command not found. Linux is case sensitive. So, for example: The command "systemctl" will not be the same as "SystemCTL" to a shell in Linux. One will work, the other will return an error saying there's no such command.
The very first one, period. The first shell for Unix didn't originally have a name but has since been referred to as the Thompson shell. The first shell ported to Linux was bash.
Many Linux users find the command line quicker than using the Graphic User Interface (GUI).