squatter: 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

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/lib/cyrus/bin/squatter - from package: cyrus-imapd

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