dasdseq: 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/dasdseq - from package: hercules

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

On Debian possible default full paths are:

/usr/bin/dasdseq - from package: hercules

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

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