Detailed explanation of Linux view commands: Revealing the secrets of common parameters and options

"Linux View Command Detailed Explanation: Common Parameters and Options Revealed"

In the Linux system, the view command is one of the operations we often use. The view command can help us view the content of files, directory structure and other information, and facilitate our work. This article will introduce in detail the common viewing commands and their commonly used parameters and options. Let us reveal the secrets of these commands together!

1. ls command

The ls command is one of the most commonly used viewing commands, used to display the file and directory list in the current directory. Commonly used parameters and options include:

• -l: Display file information in a detailed list
• -a: Display all files , including hidden files
• -h: Display file size in human-readable format
• -t: Sort by modification time
• -r: Reverse sorting

Sample code:

ls -l
ls -a
ls -lh
ls -lt
ls -lr

2. cat command

cat command is used to view files The content, common parameters and options include:

• -n: Display the line number
• -b: Display the line that is not a blank line No.
• -s: Compress multiple blank lines
• -E: Display a $

at the end of each line

Sample code:

cat -n file.txt
cat -b file.txt
cat -s file.txt
cat -E file.txt

3. less command

The less command is used to view long text files and can scroll through the file contents. Commonly used parameters and options include:

• Space key: Page down
• b key: Page up
• /Keyword: Search keyword
• -N: Display line number
• -i: Ignore Case

Sample code:

less file.txt
less -N file.txt
less -i file.txt

4. head and tail commands

The head and tail commands are used to view the first few lines and the last few lines of the file respectively. . Commonly used parameters and options include:

• -n NUM: Display the first/last NUM lines of the file
• -f: Real-time tracking Changes in the content of files

Sample code:

head -n 10 file.txt
tail -n 10 file.txt
tail -f file.log

The above are several common viewing commands and their commonly used parameters and options. By learning these commands, we can view files more efficiently Content and directory structure. I hope this article is helpful to you. If you have any questions or doubts, please leave a message to discuss!

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