obnam-viewprof: 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/obnam-viewprof - from package: obnam

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

On Debian possible default full paths are:

/usr/bin/obnam-viewprof - from package: obnam

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

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