alevt-date: 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-date - from package: alevt

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

On Debian possible default full paths are:

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

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

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