lsxid: 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/sbin/lsxid - from package: util-vserver

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