avarice: 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 CentOS possible default full paths are:

/usr/bin/avarice - from package: avarice

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/avarice - from package: avarice

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

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