tctmgr: 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/tctmgr - from package: tokyocabinet

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

On Debian possible default full paths are:

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

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

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