caret_command: 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/caret_command - from package: caret
/usr/lib/caret/bin/caret_command - from package: caret

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

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