kcforestmgr: 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/kcforestmgr - from package: kyotocabinet

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

On Debian possible default full paths are:

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

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

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