Why does typing 'Ip address show' on a Linux system often yield 'Ip: command not found'?

Why does typing 'Ip address show' on a Linux system often yield 'Ip: command not found'?

• A. Linux/UNIX commands are case sensitive.
• B. The command is deprecated.
• C. You need root privileges.
• D. The command 'Ip' is valid.

Answer: (A)

When you type a command in Linux, the shell looks for an executable that matches exactly what you typed in the search PATH. Linux treats upper- and lower-case letters as distinct, so “Ip” is not the same as the actual command “ip.” The correct way to query network addresses is to use the lowercase command name (ip address show or ip addr show). Since there’s no executable named “Ip” in PATH, you get the message that the command was not found. This is a matter of case sensitivity, not deprecation or required root privileges.

When you type a command in Linux, the shell looks for an executable that matches exactly what you typed in the search PATH. Linux treats upper- and lower-case letters as distinct, so “Ip” is not the same as the actual command “ip.” The correct way to query network addresses is to use the lowercase command name (ip address show or ip addr show). Since there’s no executable named “Ip” in PATH, you get the message that the command was not found. This is a matter of case sensitivity, not deprecation or required root privileges.