imextract: command not found

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/imextract - from package: wcstools

You may install the required package with command apt-get install {package}

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