ibdmsh: 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/ibdmsh - from package: ibutils

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

On Debian possible default full paths are:

/usr/bin/ibdmsh - from package: ibutils

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

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