map_reads_to_reference.py: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/lib/qiime/bin/map_reads_to_reference.py - from package: qiime

You may install the required package with command apt-get install {package}

Error in other languages:
map_reads_to_reference.py: bevel nie gevind nie
map_reads_to_reference.py: comandă negăsită
map_reads_to_reference.py: comando não encontrado
map_reads_to_reference.py: commande introuvable
map_reads_to_reference.py: command not found
map_reads_to_reference.py: käsku ei ole
map_reads_to_reference.py: không tìm thấy lệnh
map_reads_to_reference.py: komanda nerasta
map_reads_to_reference.py: Kommando nicht gefunden.
map_reads_to_reference.py: kommandot finns inte
map_reads_to_reference.py: komut yok
map_reads_to_reference.py: nie znaleziono polecenia
map_reads_to_reference.py: níor aimsíodh an t-ordú
map_reads_to_reference.py: no se encontró la orden
map_reads_to_reference.py: no s'ha trobat l'ordre
map_reads_to_reference.py: opdracht niet gevonden
map_reads_to_reference.py: parancs nem található
map_reads_to_reference.py: perintah tidak ditemukan
map_reads_to_reference.py: príkaz nenájdený
map_reads_to_reference.py: příkaz nenalezen
map_reads_to_reference.py: команда не найдена
map_reads_to_reference.py: командата не е открита
map_reads_to_reference.py: 命令找不到
map_reads_to_reference.py: コマンドが見つかりません