jabber-querybot: 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/jabber-querybot - from package: jabber-querybot

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