Linux Command record artifact history command basics 6

5. Command completion

Internal commands are built-in with shell;

An external command is in a path with the same executable name as the command.

Program;

6. hash table, which allows you to quickly search for historical cache content;

-R: clears the cache;

-D COMMAND: clears the specified COMMAND cache;

7. Path completion

Perform path search based on the given headers;

8. Command history

Bash and all commands are cached in the memory. By default, 1000 commands are cached.

(Echo $ HISTSIZE );

History: View history commands (echo $ history );

Echo $ HISTFILE );

! COMMAND

Call the last parameter of the previous command:

ESC + release +. Or! + $;

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