stripfits: 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 Debian possible default full paths are:

/usr/bin/stripfits - from package: qfits-tools

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

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