Comprehensive analysis of Linuxcpio operating mode

In the IT field, Linux, as an open source operating system, is widely used in servers, personal computers and other fields. In Linux systems, there are many practical commands that can help users manage files, directories, data, etc. Among them, the cpio command is a very practical backup and recovery tool that can help users operate files more efficiently.

1. Basic concept of cpio command

The cpio command is a command line utility for copying file data. It can copy files to other locations or Extract files from archive files. It is designed for processing archive files in Unix systems and supports a variety of different operating modes.

2. Common operating modes of the cpio command

In the Linux system, the cpio command provides several common operating modes, which are:

a Operation mode (archive mode): Create an archive file and copy files to the file.
i Operation mode (extract mode) : Extract files from archive files.
t Operation mode (table mode) : List all files in the archive.
r Operation mode (replace mode) : Replace the corresponding file of the existing file in the archive file with a new file.
u Operation mode (update mode) : Only changes relative to the corresponding files in the archive will be added.
l Operation mode (link mode) : Create a hard link.
m Operation mode (make directories mode) : Create directories.

Below we will demonstrate the usage of these operation modes through specific code examples:

3. Example demonstration

a Operation mode

echo "hello world" > file.txt
cpio -o > archive.cpio < file.txt

i Operating Mode

cpio -i < archive.cpio
cat file.txt

t Operating Mode

cpio -t < archive.cpio

r Operating Mode

echo "hello again" > file.txt
cpio -o < archive.cpio < file.txt

u Operation mode

echo "hello Linux" > file.txt
cpio -u < archive.cpio < file.txt

l Operation mode

ln file.txt link.txt

m Operation mode

cpio -md < directory.cpio

4. Summary

Through the introduction of this article, we have learned about the basic concepts and common operation modes of the cpio command. Through actual code example demonstrations, I hope readers can have a deeper understanding and mastery of how to use the cpio command in Linux systems. In daily work, reasonable use of cpio commands can help users manage files and directories more efficiently and improve work efficiency. I hope this article is helpful to everyone, thank you for reading.

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