dailystrips-update: 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/dailystrips-update - from package: dailystrips

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

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