bshdoc: 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/bshdoc - from package: bsh

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

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