ansel-exif-to-tags: 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/ansel-exif-to-tags - from package: php-horde-ansel

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

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