bossash: 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/bossash - from package: bossa-cli

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

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