[Bird Brother Linux Video tutorial finishing]03_02_linux file management commands and bash features detailed

First, text sorting

Sort by default is not sorted by numeric size, and is sorted by Aciis table.

-N: Sort by numeric size;

-R: Descending sort

-T: Field delimiter

-K: Which field is the keyword to sort

[Email protected] ~]# sort-t:-k3-n/etc/passwd

Root:x:0:0:root:/root:/bin/bash

Bin:x:1:1:bin:/bin:/sbin/nologin

-U: The same row is only displayed once after sorting

-F: Ignore character capitalization when sorting

Uniq

The same row that is not adjacent is not a duplicate row

-D: Show only duplicate rows

-D: Show all duplicate rows

-C: Displays the number of duplicate rows in the file

Ii. Text Statistics

WC (Word count)

Number of lines of words bytes

-L: Show only rows

-W: Displays only the number of words

-C or-M: shows only the number of bytes

-L: The longest line includes the number of characters

Three, character processing commands

TR convert or delete characters

TR [OPTION] ... SET1 [SET2]

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

Four, bash and its characteristics

Shell: Shell

Program-Process

A process is a copy of a program, and a process is a program execution instance

Process: In each process it appears that the current host has only the kernel and the current process

shell--Child Shell Pstree View

Bash Features:

1. Command history

View command history: Historical

-C: Empty command history

-D OFFSET [n]: Delete the specified location history command

-W: Save the Command history to the history file

command history buffer Size: histsize echo $HISTSIZE

Command history Usage Tips:

!n: Execute nth command in command history

!-n: Executes the last nth command in the command history

!: Execute Last Command

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

!$ or ESC,.: Reference the last parameter of the previous command

Command completion: Tab key or two tabs

Path Completion: Ibid.

2. Pipelines, redirects

3. Command aliases

4. Command-line editing

1). Cursor Jump

A.ctrl+a: Jump to the beginning of the command

B.ctrl+e: Jump to the end of the command line

C.ctrl+u: Delete cursor to beginning of line

D.CTRL+K: Delete cursor to end of line

E.ctrl+l: Clear Screen

5. Command line expansion

6. File name Wildcard

7. Variables

8. Programming

This article is from the "Linux Blind Advanced Road" blog, please be sure to keep this source http://blindbird.blog.51cto.com/12338383/1878932

[Bird Brother Linux Video tutorial finishing]03_02_linux file management commands and bash features detailed