finch: 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/finch - from package: finch

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

On Debian possible default full paths are:

/usr/bin/finch - from package: finch

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

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