cue2toc: 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 CentOS possible default full paths are:

/usr/bin/cue2toc - from package: cdrdao

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/cue2toc - from package: cue2toc

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

Error in other languages:
cue2toc: bevel nie gevind nie
cue2toc: comandă negăsită
cue2toc: comando não encontrado
cue2toc: commande introuvable
cue2toc: command not found
cue2toc: käsku ei ole
cue2toc: không tìm thấy lệnh
cue2toc: komanda nerasta
cue2toc: Kommando nicht gefunden.
cue2toc: kommandot finns inte
cue2toc: komut yok
cue2toc: nie znaleziono polecenia
cue2toc: níor aimsíodh an t-ordú
cue2toc: no se encontró la orden
cue2toc: no s'ha trobat l'ordre
cue2toc: opdracht niet gevonden
cue2toc: parancs nem található
cue2toc: perintah tidak ditemukan
cue2toc: príkaz nenájdený
cue2toc: příkaz nenalezen
cue2toc: команда не найдена
cue2toc: командата не е открита
cue2toc: 命令找不到
cue2toc: コマンドが見つかりません