zarafa-archiver: 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/zarafa-archiver - from package: zarafa-archiver

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

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