load_remote_mapping_file.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/load_remote_mapping_file.py - from package: qiime

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

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