systemd-stdio-bridge: 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/systemd-stdio-bridge - from package: systemd

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

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