compute_core_microbiome.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/compute_core_microbiome.py - from package: qiime

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

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