hledger-interest: 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/hledger-interest - from package: hledger-interest

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

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