add_qiime_labels.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/add_qiime_labels.py - from package: qiime

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

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