decomment: 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/decomment - from package: pmccabe

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

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