gpgsplit: 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 CentOS possible default full paths are:

/usr/bin/gpgsplit - from package: gnupg2

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/gpgsplit - from package: gnupg

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

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