10. cp (Copy)

The cp command is the standard tool for copying files and directories in Linux. Its basic syntax is cp [SOURCE] [DESTINATION].

Basic File Copying

To copy a file, you specify the source file and the destination directory or path.

cp mycoolfile /home/pete/Documents/cooldocs

In this example, mycoolfile is the source file, and /home/pete/Documents/cooldocs is the destination directory. You can also copy a file and give it a new name in the destination.

cp mycoolfile /home/pete/Documents/mycoolfile_backup

Using Wildcards for Bulk Copying

Wildcards are special characters that help you select multiple files based on patterns, providing great flexibility.

• *: Matches any sequence of characters.
• ?: Matches any single character.
• []: Matches any one of the characters enclosed in the brackets.

For example, to copy all JPEG images from your current location to the Pictures directory:

cp *.jpg /home/pete/Pictures

Copying Directories Recursively

If you try to copy a directory using cp without any options, you will receive an error. To copy a directory and all of its contents, including subdirectories, you must use the -r (recursive) flag.

cp -r Pumpkin/ /home/pete/Documents

This command copies the Pumpkin directory and everything inside it to your Documents directory.

Handling File Overwrites

By default, cp will overwrite a file at the destination if it has the same name. To prevent accidental data loss, use the -i (interactive) flag, which prompts for confirmation before overwriting.

cp -i mycoolfile /home/pete/Pictures

Conversely, if you want to force an overwrite without any prompts, you can use the cp -f flag. This is useful in scripts where user interaction is not possible.

cp -f mycoolfile /home/pete/Pictures

Preserving File Attributes with cp -p

When you copy a file, its metadata, such as modification time and ownership, is typically updated. To preserve these original attributes, the cp -p flag is essential. Using cp -p in linux ensures that the copy is an exact replica, not just in content but also in its metadata.

The cp -p flag is particularly useful for backups or when migrating files where preserving timestamps is critical.

cp -p mycoolfile /home/pete/backups/

This command demonstrates how to use linux cp -p to copy mycoolfile while preserving its mode, ownership, and timestamps.