catman: 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/catman - from package: man-db

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

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