listimages: 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/listimages - from package: libcam-pdf-perl

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