recountdiff: 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/recountdiff - from package: patchutils

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

On Debian possible default full paths are:

/usr/bin/recountdiff - from package: patchutils

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

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