Study Notes for Linux _ Day4 and Study Notes _ day4

Study Notes for Linux _ Day4 and Study Notes _ day4

The fourth day, continue learning. Today, I saw a saying, "What do you think is what you think? ", This sentence is a bit interesting !!!

 

1. Command for viewing File Content

File dest: view the file type. In Linux, file types include text files, directories, linked files (hard links and soft links), script files (executable files), and binary files.

Cat dest: view all contents of the file.

Cat-n dest: view all the content of the file and add a row number to each row. The-n parameter adds a line number to all rows, provided that each row has a line break.

More dest: view the file content by page. You can press space or enter to continue browsing and press q or Q to exit.

Tail dest: view the content of the last 10 rows. The default value is the last 10 rows. Tail actually means the tail, so...

Tail-n num dest: view the content of the last num row. You can also write it as tail-num dest, where num is the parameter value.

Tail-f dest: dynamically view the file content. This command can detect system logs in real time.

Head dest: view the content of the first 10 rows. The default value is the first 10 rows.

Head-n num dest: view the content of the previous num row. You can also write it as head-num dest, where num is the parameter value.

Next, demonstrate the effect of each command

File dest, 4-1, a Unicode-encoded text file

　　　　

Figure 4-1

Cat dest, 4-2 shown

　　　　

Figure 4-2

Cat-n dest, 4-3

　　　　

Figure 4-3

More dest, 4-4

　　　　

Figure 4-4

Tail dest, as shown in 4-5

　　　　

Figure 4-5

Tail-n num dest, as shown in 4-6

　　　　

Figure 4-6

Head dest, 4-7

　　　　

Figure 4-7

Head-n num dest, as shown in 4-8

　　　　

Figure 4-8

 

 

Happy Day4 !!!!