posplit: 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/posplit - from package: translate-toolkit

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

On Debian possible default full paths are:

/usr/bin/posplit - from package: translate-toolkit

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

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