seqret: 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/seqret - from package: emboss

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

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