How to use linux less command

linux less command is used to browse files at will, and supports page turning and search. It also supports page up and page down. Its usage is such as "less log2013.log" means viewing "log2013.log" " file, "ps -ef |less" means to view process information through ps and display it in paging using less.

#The operating environment of this tutorial: linux5.9.8 system, Dell G3 computer.

How to use the linux less command?

Linux less command detailed explanation

less is similar to more, less can browse files at will, supports page turning and search, and supports page up and page down. Page.

Syntax

less [参数] 文件

Parameter description:

-b Set the size of the buffer

-e When the file display ends , automatically exit

-f Force open special files, such as peripheral device codes, directories and binary files

-g Only mark the last searched keyword

-i Ignore the search The case of

-m displays the percentage similar to the more command

-N displays the line number of each line

-o will output less The content is saved in the specified file

-Q Does not use warning sound

-s Displays consecutive empty lines as one line

-S If the line is too long, the excess part will be discarded

-x Display the "tab" key as the specified number space

/String: Function to search down for "string"

?String : Function to search "string" upwards

n: Repeat the previous search (related to / or ?)

N: Repeat the previous search in reverse direction (related to / or ?)

b Turn up one page

d Turn back half a page

h Display help interface

Q Exit less command

u Go to Scroll half a page forward

y Scroll forward one line

Space key scrolls one page

Enter key scrolls one line

[pagedown]: Scroll down One page

[pageup]: Scroll up one page

Example

1. View the file

less log2013.log

2. View process information with ps and paging through less Display

ps -ef |less

3. View the command history usage record and display it through less paging

[root@localhost test]# history | less
22  scp -r tomcat6.0.32 root@192.168.120.203:/opt/soft
23  cd ..
24  scp -r web root@192.168.120.203:/opt/
25  cd soft
26  ls
……省略……

4. Browse multiple files

less log2013.log log2014.log

Instructions:

After inputting: n, switch to log2014.log

After inputting: p, switch to log2013.log

Additional remarks

1. Full screen navigation

ctrl F - Move forward one screen

ctrl B - Move one screen backward

ctrl D - Move forward Half screen

ctrl U - Move half screen backward

2. Single line navigation

j - Next line

k - Previous line

3. Other navigation

G - Move to the last line

g - Move to the first line

q / ZZ - Exit less command

4. Other useful commands

v - Use the configured editor to edit the current file

h - Display the help document of less

&pattern - Display only lines matching the pattern, Instead of the entire file

5. Mark navigation

When using less to view a large file, you can mark it at any position, and you can navigate to the text position marked with a specific mark through the command:

ma - Use a to mark the current position of the text

'a - Navigate to the mark a

Recommended learning: "Linux Video Tutorial"

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