Three or four unit (man vim management input and output)

Unit Three

1. Man

Man->>manual # # #man是手册缩写

Man Man # # # # #查看man命令的帮助

Man passwd # # #查看passwd命令的帮助

The level of man

1 system commands

2 System interface

3 Function libraries

4 special files, such as device files

5 files

6 games

7 Package for the system

8 System Administration Commands

9 cores

Man 5 passwd # help #查看/etc/passwd file

Man 1 passwd # #查看passwd命令的帮助, 1 can be omitted

A shortcut to the man page

Down Key # #向上或向下一行

Pageup|pagedown # #向下一个屏幕或者向上一个屏幕

D|u # #向下或者向上半个屏幕

G|GG # #跳转页面到man最下面或最上面

/keyword # #搜索关键字, keywords are highlighted, n is matched, n up

Q # #退出帮助页面

Unit Four

I. Managing input and OUTPUT

In a Linux system, the correct output number is 1, the error output number is 2

Perform "student" with ordinary users in the system

Find/etc-name passwd

Because the student user rights issue will have the following output

Find: '/etc/pki/ca/private ': Permission denied # #没有进入权力, error

Find: '/etc/pki/rsyslog ': Permission denied

Find: '/etc/audit ': Permission denied

/ETC/PASSWD # #正确输出

Find: '/ETC/POLKIT-1/RULES.D ': Permission denied

Find: '/etc/polkit-1/localauthority ': Permission denied

Find: '/etc/dhcp ': Permission denied

Find: '/etc/selinux/targeted/modules/active ': Permission denied

Find: '/etc/lvm/archive ': Permission denied

Find: '/etc/lvm/backup ': Permission denied

Find: '/etc/lvm/cache ': Permission denied

Find: '/ETC/GRUB.D ': Permission denied

/ETC/PAM.D/PASSWD # #正确输出

Find: '/etc/audisp ': Permission denied

Find: '/etc/firewalld ': Permission denied

Find: '/etc/cups/ssl ': Permission denied

Find: '/etc/ipsec.d ': Permission denied

Find: '/etc/libvirt ': Permission denied

Find: '/ETC/SUDOERS.D ': Permission denied

Find: '/etc/named ': Permission denied

Find/etc-name passwd > File # #重定向正确输出

Find/etc-name passwd 2> File # #重定向错误输出

Find/etc-name passwd &> File # #重定向所有输出

Note: 2>,&> will overwrite the contents of the source file.

>file # #清空file

Find/etc-name passwd >> File # #追加正确输出

Find/etc-name passwd 2>> File # #追加错误输出

Find/etc-name passwd &>> File # #追加所有输出

Note:>> 2>> &>> does not overwrite the contents of the source file, it will characters the corresponding output word to the end of the file.

| The function of a pipe is to change the output of the previous command into the input of the post-pipeline command.

Ls/bin | Wc-l # #统计ls The number of lines that the/bin command outputs

The wrong output in the system is not available through the pipeline.

Use 2>&1 to change the wrong output number from 2 to 1.

Tee copy output to specified location

Date |tee file |wc-l # # #tee命令复制date命令的输出到file中, and count the number of output rows

Two. Vim

# # # #1. Vim Command mode # # #

Vim can be configured to work in Vim's command mode

: Set Nu # #行号添加

: Set Nonu # #取消行号

: Set Mouse=a # #添加鼠标选择

: Set Cursorline # #行线显示

The above settings are temporary,

Permanent setting mode

VIM/ETC/VIMRC # # #此文件为vim的配置文件, at the end of this file add the above parameters, add to the number of files do not need:

# # # #2. Vim Command mode keyword search # # # # #

/keywords

N Match down

N Up match

Character Management in 3.vim command mode

1. Copying of characters

YL # #复制一个字母

Y3L # #复制3个字母

YW # #复制一个单词

Y3W # #复制3个单词

YY # #复制一行

Y3Y # #复制3行

P # #复制完成后按 "P" paste

2. Deletion of characters

DL # #删除一个字母

D3L # #删除3个字母

DW # #删除一个单词

D3W # #删除3个单词

DD # #删除一行

D3D # #删除3行

3. Cutting of characters

CL # #剪切一个字母

C3L # #剪切3个字母

CW # #剪切一个单词

C3W # #剪切3个单词

CC # #剪切一行

C3C # #剪切3行

ESC---> P # #剪切过后会进入到插入模式, be sure to exit insert mode when performing a paste action

4.vim Visualization Mode

Press "CTRL + V" in command mode to enter the visual mode

In visual mode, you can select characters in the area

Bulk add characters in visual mode

*>> Ctrl + V Select the column to which you want to add characters

*>> Press "I" into insert mode, write the characters to be added

*>> Press ESC

5. Bulk modification of characters

:%s/original character/replace character # #只替换每一行中出现的第一个原有字符

:%s/original character/replace character/g # #替换所有

:%s/\t//g # #把全文的tab键替去掉, \ t = Tab key

:%s/^\ *//g # #把全文行首的空格去掉, "^\ *" indicates the space at the beginning of the line

:%s/^\#\ */#/g # #把全文 # After the space is removed

6.vim Split-screen function

Ctrl+w S # # #上下分屏

Ctrl+w V # # #左右分屏

Ctrl+w C # # #关闭光标所在屏幕

Ctrl+w up or down # # #光标移动到指定屏幕

7.vim cursor Movement

in command mode

: Number # #移动到指定的行

G # #文件最后一行

GG # #文件第一行

In insert mode

I # #光标所在位置插入

I # #光标所在行行首

A # #光标所在字符的下一个位置

A # #光标所在行行尾

O # #光标所在行下一行

O # #光标所在行上一行

S # #删除光标所在字符插入

S # #删除光标所在行插入

Exit mode of 8.vim

: Q # #当用vim打开文件但没有对字符作任何操作时可直接退出

: q! # #当用vim打开文件并对字符作操作, quit all operations

: Wq # #保存退出

: wq! # #强行保存退出, effective for Superuser and file owner

# # # #9. Vim Handbook # # #

Vimtutor # #vim的手册

: Q # #退出vimtutor

Three. Gedit

CTRL + N # #在gedit中打开一个新的tab

Ctrl+s # #保存文件

Ctrl+o # #打开文件

Ctrl+x # #剪切字符

Ctrl + V # #粘贴字符

CTRL + C # #复制字符

Yelp Help:gedit # #gedit的图形手册

# #end # #

Three or four unit (man vim management input and output)