jcat: 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/jcat - from package: sleuthkit

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

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