sgmlspl: 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/sgmlspl - from package: perl-SGMLSpm

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

On Debian possible default full paths are:

/usr/bin/sgmlspl - from package: sgmlspl

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

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