maq_eval.pl: command not found

Have You tried accessing the binary with the full path?

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/maq_eval.pl - from package: maq

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