impressive-gettransitions: 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/impressive-gettransitions - from package: impressive

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

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