ibdmchk: 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/ibdmchk - from package: ibutils

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

On Debian possible default full paths are:

/usr/bin/ibdmchk - from package: ibutils

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

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