slmseg: command not found

Have You tried accessing the binary with the full path?

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/slmseg - from package: sunpinyin-utils

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