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