8.1 Shell Introduction 8.2 command History 8.3 command completion and alias 8.4 wildcard 8.5 input/output weight

8.1 Shell Introduction

Shell Introduction

8.2 Command History

Command-history

History environment variables

Empty the history configuration file

Modify the history file

Enable the history variable to take effect

Enable history to take effect

Can only append, cannot delete

8.3 Command Completion and aliases

Command completion and aliases

8.4 Wildcard Characters

Wildcard characters

8.5 Input and output redirection

Input and output redirection

Error output redirection

Append redirect

A > indicates the correct redirect

2 >> indicates append redirect

2> Error Redirection

2>> Error Append redirect

&>: means to output both correct and incorrect output to a single place

Append Error Redirection:

Correct and incorrect output to 2 different files respectively

8.1 Shell Introduction 8.2 command History 8.3 command completion and alias 8.4 wildcard 8.5 input/output weight