sxid: 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/sxid - from package: sxid

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