digitaglinktree: 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 CentOS possible default full paths are:

/usr/bin/digitaglinktree - from package: digikam

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/digitaglinktree - from package: digikam

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

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