Linux bash features (20170419)

Character processing commands

TR: Character conversion or character deletion command

-D: Delete all characters that appear in the character set

Bash and its features

Shell: Shell

Gui:gnome, KDE, Xface

Cli:sh, CSH, ksh, bash

The difference between a program and a process

Bash:

1: Command history

2: Pipeline, redirect

3: Command Alias

4: Command line editing

5: Command line expansion

6: File name wildcard

7: Support Variables

8: Support Programming (shell script)

command-line editing:

Cursor Jump:

CTRL + A: Jump to the beginning of the command line

Ctrl+e: Jump to the end of the command line

Ctrl+u: Delete the cursor to the beginning of the command line

CTRL+K: Delete the cursor to the end of the command line

Ctrl+l: Clear Screen

Command history:

View the execution command history:

-C: Empty history command

-d:offset[n]: Remove the command from the pinned position

-W: Save command history to File

Environment variables

Path: Command Search Path

Histsize: Command history size (buffer size)

The use of command history tips

！ N: Execution of the nth rule of the command history

!: Executes the previous command

！ -N: Executes the last nth of the command history

！ String: The most recent command in the command history that starts with the specified string

！ $: Reference the last parameter of the previous command

Features of command completion

Features of Path completion

Linux bash features (20170419)