csvtool: 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/csvtool - from package: ocaml-csv

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

On Debian possible default full paths are:

/usr/bin/csvtool - from package: csvtool

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

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