squizz: 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/bin/squizz - from package: squizz

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