indxbib: command not found

Have You tried accessing the binary with the full path?

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/indxbib - from package: groff

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

On Debian possible default full paths are:

/usr/bin/indxbib - from package: groff

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