---
name: "leon"
section: "1"
platform: "linux"
package: "gatb-core"
version: "1.4.2+dfsg-13+b4"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/leon"
---

# leon(1)

reference free compression for NGS reads

## NAME

leon - reference free compression for NGS reads

## OPTIONS

### leon options

- **-file**

  (1 arg) :    input file (e.g. FASTA/FASTQ for compress or .leon file for decompress)

- **-c**

  (0 arg) :    compression

- **-d**

  (0 arg) :    decompression

- **-nb-cores**

  (1 arg) :    number of cores (default is the available number of cores)  \[default '0'\]

- **-lossless**

  (0 arg) :    switch to lossless compression for qualities (default is lossy. lossy has much higher compression rate, and the loss is in fact a gain. lossy is better!)

### compression options

- **-kmer-size**

  (1 arg) :    size of a kmer  \[default '31'\]

- **-abundance**

  (1 arg) :    abundance threshold for solid kmers (default inferred)  \[default ''\]

- **-init-iterator**

  (0 arg) :    init iterator for ibank mode

- **-seq-only**

  (0 arg) :    store dna seq only, header and quals are discarded, will decompress to fasta (same as **-noheader** **-noqual**)

- **-noheader**

  (0 arg) :    discard header

- **-noqual**

  (0 arg) :    discard quality scores

## AUTHOR

This manpage was written by Andreas Tille for the Debian distribution and can be used for any other usage of the program.