link-parser: 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/link-parser - from package: link-grammar

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

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