kccachetest: 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/kccachetest - from package: kyotocabinet

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

On Debian possible default full paths are:

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

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

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