dash-search: 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/dash-search - from package: cruft

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

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