| More docs on the ARB website. See also index of helppages. Last update on 14. Feb 2019 .

Main topics:

- ARB: a Short Introduction
- Glossary

Related topics:

- GDE Extended Menu
- ARB: Database
- ARB environment variables

# ARB: Basic ARB-Shell Commands

- OCCURRENCE
- COMMANDS
- NOTES
- WARNINGS
- BUGS

## OCCURRENCE

### shell

## COMMANDS

### 'arb [filename]'

Starts the main program ARB_NT which also includes the database server.
The database server is memory based. That means:

- All changes are only temporary until the database is saved.
- The database is a single file which can be copied, deleted, renamed ...

The database file should have the suffix '.arb'.

### 'arb_clean'

Stops all your ARB processes and removes all temporary files in the /tmp directory. It does not kill non-arb processes. That means if you start programs via the GDE interface you have to stop them yourself: (phylip, desoete, ...)

    enter 'ps -ux'   or 'ps -f'
    search the process-id PID and kill it with
    'kill -9 PID'

### 'arb_panic'

Sends a signal (HANGUP) to ARB_NT to force saving the database in ASCII mode. Because arb_panic bypasses any running operation of ARB_NT,
THE SAVED DATABASE MAY CONTAIN INCONSISTENT DATA.
It interactively asked for file name and whether it should kill arb after saving.

### 'arb_2_ascii filename [dest_filename]'

Converts any ARB database to ASCII format.
Also tries to recover corrupt files (if dest_filename is skipped). Backup first!!!

### ´arb_2_bin [-m] [-r] [-c][tree_xxx] database [newdatabase]´

Purpose: Converts a database to binary format

    Options:
             -m            create map file too
             -r            try to repair destroyed database
             -c[tree_xxx]  optimize database using tree_xxx or largest tree

## NOTES

### It is very useful to start a performance meter to see whether there are running background jobs (fastdnaml, phylip...)

### All arb_... commands show some basic usage info if you call them with parameter '--help'

i.e. arb_ntree --help

## WARNINGS

### Don't destroy an existing arb file with arb_panic.

## BUGS

### No bugs known