/var/log/secure 在 14.04 中不存在，还有其他选择吗？

在阅读有关 Linux 的信息时，尤其是有关 Linux 的信息sudo时，我得到：

/var/log/secure当尝试在sudo bash未成功验证用户身份的情况下执行时，系统日志文件中会出现如下消息（通常是）：

authentication failure; logname=op uid=0 euid=0 tty=/dev/pts/6 ruser=op rhost= user=op
conversation failed
auth could not identify password for [op]
op : 1 incorrect password attempt ;
TTY=pts/6 ; PWD=/var/log ; USER=root ; COMMAND=/bin/bash

然后我在我的 shell 提示符下尝试了它：

anupam@JAZZ:~$ sudo bash
[sudo] password for anupam: 
root@JAZZ:~# 

然后当我寻找时/var/log/secure，它不在那里

anupam@JAZZ:~$ more /var/log/secure
/var/log/secure: No such file or directory
anupam@JAZZ:~$ ls /var/log
alternatives.log       auth.log         dmesg           gpu-manager.log  mysql.log              pm-suspend.log.2.gz  upstart
alternatives.log.1     auth.log.1       dmesg.0         hp               mysql.log.1.gz         samba                wtmp
alternatives.log.2.gz  auth.log.2.gz    dmesg.1.gz      installer        mysql.log.2.gz         speech-dispatcher    wtmp.1
apache2                auth.log.3.gz    dmesg.2.gz      jetty            mysql.log.3.gz         syslog               Xorg.0.log
apport.log             auth.log.4.gz    dmesg.3.gz      kern.log         mysql.log.4.gz         syslog.1             Xorg.0.log.old
apport.log.1           boot.log         dmesg.4.gz      kern.log.1       mysql.log.5.gz         syslog.2.gz          Xorg.1.log
apport.log.2.gz        bootstrap.log    dpkg.log        kern.log.2.gz    mysql.log.6.gz         syslog.3.gz          Xorg.1.log.old
apport.log.3.gz        btmp             dpkg.log.1      kern.log.3.gz    mysql.log.7.gz         syslog.4.gz
apport.log.4.gz        btmp.1           dpkg.log.2.gz   kern.log.4.gz    pm-powersave.log       syslog.5.gz
apport.log.5.gz        ConsoleKit       faillog         lastlog          pm-powersave.log.1     syslog.6.gz
apport.log.6.gz        cups             fontconfig.log  lightdm          pm-powersave.log.2.gz  syslog.7.gz
apport.log.7.gz        dbconfig-common  fsck            mysql            pm-suspend.log         udev
apt                    dist-upgrade     gdm             mysql.err        pm-suspend.log.1       unattended-upgrades

/var/log/secure我的系统中有其他选择吗？