teem-nrrdSanity: command not found

Have You tried accessing the binary with the full path?

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 Debian possible default full paths are:

/usr/lib/debug/usr/bin/teem-nrrdSanity - from package: libteem2-dbg
/usr/bin/teem-nrrdSanity - from package: teem-apps

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