debsigs-autosign: 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/debsigs-autosign - from package: debsigs

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

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