bsearch: 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/bsearch - from package: heimdal-workstation

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

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