keychain: 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/keychain - from package: keychain

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

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