ibtracert: 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/ibtracert - from package: infiniband-diags

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

On Debian possible default full paths are:

/usr/sbin/ibtracert - from package: infiniband-diags

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

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