CPIO: An Archive Format for Files and Directories
An Introduction to CPIO
CPIO, short for "copy in, copy out," is an archive format that collects any number of files, directories, and other file system objects into a single file. It is a platform-independent format that can be read and written on a variety of operating systems.
Creating CPIO Archives
To create a CPIO archive, you can use the `cpio` command with the `-c` flag. This flag tells `cpio` to create a new archive file. You can specify the name of the archive file after the `-c` flag. For example, to create an archive called `my_archive.cpio` containing the files `file1.txt`, `file2.txt`, and `file3.txt`, you would use the following command: ``` cpio -c my_archive.cpio file1.txt file2.txt file3.txt ```
Extracting Files from CPIO Archives
To extract files from a CPIO archive, you can use the `cpio` command with the `-i` flag. This flag tells `cpio` to extract the files from the archive. You can specify the name of the archive file after the `-i` flag. For example, to extract the files from the `my_archive.cpio` archive, you would use the following command: ``` cpio -i my_archive.cpio ```
CPIO File Format
A CPIO archive consists of a series of records, each of which contains a header and a data block. The header contains information about the file, such as the file name, size, and permissions. The data block contains the actual data of the file. The CPIO file format is a flexible format that can be used to store a variety of different types of files. It is a common format for backups and for distributing software.
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