showfeat: 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/showfeat - from package: emboss

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

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