akonadictl: 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/akonadictl - from package: akonadi

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

On Debian possible default full paths are:

/usr/bin/akonadictl - from package: akonadi-server

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

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