ParsInsert: 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/parsinsert - from package: parsinsert
/usr/lib/qiime/bin/ParsInsert - from package: qiime

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

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