cindex: 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 Debian possible default full paths are:

/usr/bin/cindex - from package: codesearch

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

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