kcforesttest: 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/kcforesttest - from package: kyotocabinet

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

On Debian possible default full paths are:

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

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

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