qiime: 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/bin/qiime - from package: qiime

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

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