precat: 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/precat - from package: aspell

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

On Debian possible default full paths are:

/usr/bin/precat - from package: aspell

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

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