splitkeys: 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/splitkeys - from package: onak

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

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