xsunpinyin: 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/xsunpinyin - from package: xsunpinyin

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

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