The command `history | grep passwd` performs the following: 1. **`history`**:...

The command history | grep passwd performs the following:

1. history: Lists the command history of the current shell session. This displays all previously executed commands, typically numbered.

2. | (pipe): Passes the output of the history command as input to the next command.

3. grep passwd: Filters the output from the history command to show only lines that contain the string passwd.

In summary:

This command searches your shell's command history and shows all commands that include the word passwd. For example, it can help find commands like passwd (used to change user passwords) or any others containing passwd.