skksearch: 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/sbin/skksearch - from package: skksearch

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

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