swish-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/swish-search - from package: swish-e

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

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