swclock: 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

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:

/lib/rc/sbin/swclock - from package: openrc

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