csv: 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/csv - from package: csv

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