zrun: 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/zrun - from package: moreutils

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

On Debian possible default full paths are:

/usr/bin/zrun - from package: moreutils

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

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