cached: 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/sbin/cached - from package: dpsearch

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

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