jinfo: 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/lib/debug/usr/lib/jvm/java-7-openjdk-amd64/bin/jinfo - from package: openjdk-7-dbg
/usr/lib/jvm/java-7-openjdk-amd64/bin/jinfo - from package: openjdk-7-jdk

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

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