shellex: 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/shellex - from package: shellex

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

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