archivemount: 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/archivemount - from package: archivemount

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

On Debian possible default full paths are:

/usr/bin/archivemount - from package: archivemount

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

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