kctreemgr: 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/kctreemgr - from package: kyotocabinet

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

On Debian possible default full paths are:

/usr/bin/kctreemgr - from package: kyotocabinet-utils

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

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