ibus-sharada-braille-preferences: 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/ibus-sharada-braille-preferences - from package: ibus-sharada-braille

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

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