# Cheatsheet & Examples: cut

The `cut` command is used to extract specific parts of a file, such as columns, bytes, or characters, based on provided criteria.

## Extract specific fields by default delimiter (tab)

Example Usage:
`cut -f1,3 file.txt`

What it does:
Extracts the first and third fields (columns) from each line of `file.txt`, using tab as the delimiter.

Command-line Arguments Explained:
- `-f1,3`: Specifies the fields to extract (1st and 3rd) separated by commas.
- `file.txt`: The input file from which to extract the fields.

## Extract specific fields by custom delimiter

Example Usage:
`cut -d: -f2 file.txt`

What it does:
Extracts the second field from each line of `file.txt`, using a colon (`:`) as the delimiter.

Command-line Arguments Explained:
- `-d:`: Sets the delimiter to a colon (`:`) instead of the default tab.
- `-f2`: Specifies the field (second) to extract.
- `file.txt`: The input file.

## Extract specific bytes

Example Usage:
`cut -b3-5 file.txt`

What it does:
Extracts bytes from positions 3 to 5 (inclusive) of each line in `file.txt`.

Command-line Arguments Explained:
- `-b3-5`: Defines the byte range to extract (3 to 5).
- `file.txt`: The input file.

## Extract specific characters

Example Usage:
`cut -c1-2,5 file.txt`

What it does:
Extracts characters from positions 1 to 2 and position 5 of each line in `file.txt`.

Command-line Arguments Explained:
- `-c1-2,5`: Defines character ranges to extract (1-2 and 5).
- `file.txt`: The input file.

## Exclude specific fields

Example Usage:
`cut -f1 --complement -d: file.txt`

What it does:
Extracts all fields except the first from each line of `file.txt`, using a colon (`:`) as the delimiter.

Command-line Arguments Explained:
- `-f1`: Specifies the field to exclude (first).
- `--complement`: Tells `cut` to exclude the specified field instead of including it.
- `-d:`: Sets the delimiter to a colon (`:`).
- `file.txt`: The input file.

## Suppress lines without the delimiter

Example Usage:
`cut -d: -f2 -s file.txt`

What it does:
Extracts the second field from each line of `file.txt` but skips lines that do not contain the colon (`:`) delimiter.

Command-line Arguments Explained:
- `-d:`: Sets the delimiter to a colon (`:`).
- `-f2`: Specifies the field (second) to extract.
- `-s`: Skips lines that do not match the delimiter.
- `file.txt`: The input file.

## Output with custom delimiter

Example Usage:
`cut -d: -f1,3 --output-delimiter=, file.txt`

What it does:
Extracts the first and third fields from `file.txt` using a colon (`:`) as the delimiter and outputs them separated by a comma (`,`).

Command-line Arguments Explained:
- `-d:`: Sets the delimiter to a colon (`:`).
- `-f1,3`: Specifies the fields (1st and 3rd) to extract.
- `--output-delimiter=,`: Changes the output delimiter to a comma (`,`).
- `file.txt`: The input file.

## Extract fields from standard input

Example Usage:
`cat file.txt | cut -f1,4`

What it does:
Pipes the contents of `file.txt` into `cut` and extracts the first and fourth fields from each line.

Command-line Arguments Explained:
- `cat file.txt`: Passes the file's contents to `cut` via a pipe.
- `-f1,4`: Specifies the fields (1st and 4th) to extract.
- `|`: Pipes the output of `cat` to `cut`.

## Extract a range of fields

Example Usage:
`cut -f1-3 file.txt`

What it does:
Extracts the first, second, and third fields from each line of `file.txt` using the default tab delimiter.

Command-line Arguments Explained:
- `-f1-3`: Defines a field range (1st to 3rd).
- `file.txt`: The input file.

## Extract bytes with offset

Example Usage:
`cut -b5- file.txt`

What it does:
Extracts bytes starting from position 5 to the end of each line in `file.txt`.

Command-line Arguments Explained:
- `-b5-`: Defines a byte range starting at position 5 and continuing to the end.
- `file.txt`: The input file.

## Extract characters with offset

Example Usage:
`cut -c5- file.txt`

What it does:
Extracts characters starting from position 5 to the end of each line in `file.txt`.

Command-line Arguments Explained:
- `-c5-`: Defines a character range starting at position 5 and continuing to the end.
- `file.txt`: The input file.