Linux Rookie Learning Path >>4

# # 1 # # Management 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 passwd2> File # #重定向错误输出
Find/etc-name passwd &> File # #重定向所有输出
Note:2>,&> will overwrite source file contents
>file # #清空file
Find/etc-name passwd >> File # #追加正确输出
Find/etc-name passwd2>> File # #追加错误输出
Find/etc-name passwd &>> File # #追加所有输出
Note:>>2>> &>> does not overwrite the source file content, 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.
Use2>&1The wrong output number can be changed 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

# 2 # # 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-keyword search in vim command mode
/keywords
N Match down
N Up match

####3 Management of characters in the. Vim Command mode
1 . Copying of characters
YL # #复制一个字母
y3l # # Copy 3 Letters
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 . Character deletion
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 . Character Cut
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 you perform 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 modifier 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's 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 moves
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 # # Next position of the character where the cursor is located
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

# # # #8. Vim's exit mode
: 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
# 3 #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 # #

Linux Rookie Learning Path >>4