tchtest: 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/tchtest - from package: tokyocabinet

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

On Debian possible default full paths are:

/usr/bin/tchtest - from package: tokyocabinet-bin

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

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