acat: 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 CentOS possible default full paths are:

/usr/bin/acat - from package: atool

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/acat - from package: atool

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

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