How to rename a file in Linux?

In Linux, the mv command is used to rename a file or move it to another location.

Syntax of the command:

# Rename a file
mv <old_name> <new_name>

# Move a file to another directory while keeping the name
mv <file_name> <target_directory>/

# Move a file to another directory and rename it
mv <file_name> <target_directory>/<new_name>

Examples:

Rename the file old_file.txt to new_file.txt in the current directory:
```
mv old_file.txt new_file.txt
```
Move the file my_document.pdf from the current directory to /home/user/documents/:
```
mv my_document.pdf /home/user/documents/
```
Move the file report.csv from the current directory to /archive/ and rename it to final_report_2023.csv:
```
mv report.csv /archive/final_report_2023.csv
```

If the specified <new_name> or <target_directory>/<new_name> already exists, the file will be overwritten by default.

Useful options for mv:

-i (interactive): Prompts for confirmation before overwriting an existing file.
-f (force): Forces overwriting of existing files, suppressing prompts (-i).
-u (update): Moves/renames the file only if the source file is newer than the destination or if the destination does not exist.
-v (verbose): Outputs detailed information about the actions being performed.

Examples of using options:

# Prompt for confirmation before overwriting
mv -i my_file.txt existing_file.txt

# Force overwrite
mv -f important.log /var/log/important.log