dump_lfts.sh: 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/dump_lfts.sh - from package: infiniband-diags

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

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