bspatch: 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/bspatch - from package: bsdiff

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

On Debian possible default full paths are:

/usr/bin/bspatch - from package: bsdiff

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

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