Linux

cp — Copy Files and Directories in Linux

Learn to copy files and directories with cp: recursive copies, preserving permissions, safe overwrite options, and archive mode for backups.

January 12, 20255 min read

LinuxFilesCommands

cp copies files and directories. The key rule to remember: you always need -r to copy a directory. Without it, cp refuses to copy directories at all.

Options

cp Options

Option	Long Form	Description
`-r`, `-R`	`--recursive`	Copy directories recursively (required for dirs)
`-i`	`--interactive`	Prompt before overwriting
`-f`	`--force`	Force overwrite without prompting
`-n`	`--no-clobber`	Never overwrite existing files
`-u`	`--update`	Copy only when source is newer than destination
`-v`	`--verbose`	Show each file as it's copied
`-p`	`--preserve`	Preserve permissions, ownership, timestamps
`-a`	`--archive`	Archive mode = `-dR --preserve=all` — best for backups

How Destination Works

How cp behaves depends on whether the destination already exists and whether it's a directory:

Destination is a directory → file is copied into that directory keeping its name
Destination doesn't exist → file is copied with the new name
Destination exists as a file → file is overwritten (unless -n or -i)

cp-examples.sh

# ─── Copying files ───────────────────────────────────────────
cp file.txt backup.txt               # Copy and rename (backup.txt is new name)
cp file.txt /path/to/dir/            # Copy into directory (keeps name: dir/file.txt)
cp file.txt /path/to/dir/newname.txt # Copy into directory with new name
cp file1.txt file2.txt dir/          # Copy multiple files into a directory

# ─── Copying directories ─────────────────────────────────────
cp -r folder/ folder_backup/         # Copy entire directory tree
cp -r dir1 dir2 destination/         # Copy multiple directories
cp -rv folder/ backup/               # Verbose: see each file copied

# ─── Safety ──────────────────────────────────────────────────
cp -i source.txt dest.txt            # Ask before overwriting
cp -n source.txt dest.txt            # Never overwrite (silently skip)
cp -u source.txt dest.txt            # Only copy if source is newer

# ─── Preserving attributes ───────────────────────────────────
cp -p file.txt backup.txt            # Preserve: permissions, owner, timestamps
cp -a folder/ backup/                # Archive mode — preserves EVERYTHING
                                     # Use -a for backups, system copies

Use -a for Backups

cp -a (archive mode) is the recommended way to make a backup copy of a directory. It recursively copies everything and preserves file permissions, ownership, timestamps, and symlinks exactly. A plain cp -r might change timestamps or miss symlinks.

Common Patterns

# Backup a config file before editing it
cp /etc/nginx/nginx.conf /etc/nginx/nginx.conf.bak
# Now you can safely edit nginx.conf

# Copy all .txt files to a directory
cp *.txt /backup/

# Interactive copy (safe for important files)
cp -ri important-folder/ backup-folder/

# Sync: only copy newer files
cp -ru source/ destination/

# Create a hard link instead of copying (saves disk space)
cp -l file.txt hardlink.txt

# Create a symlink instead of copying
cp -s /path/to/original symlink.txt

Quick Check

You run `cp config.yaml /backup/` and `/backup/` is an existing directory. Where does the file end up?

Exercise

Create a file with some content: echo "important data" > data.txt
Make a backup: cp data.txt data.txt.bak
Create a directory backup/ and copy data.txt into it
Now try: cp -n data.txt backup/data.txt — what happens (does it overwrite)?
Create a directory src/ with a few files, then copy the whole thing with -a flag