featmerge: 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/featmerge - from package: emboss

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

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