slashtime: 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/slashtime - from package: slashtime

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

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