alevt: 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/alevt - from package: alevt

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

On Debian possible default full paths are:

/usr/bin/alevt - from package: alevt
/usr/bin/alevt - from package: dvb-apps

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

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