skipseq: 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/skipseq - from package: emboss

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

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